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RK
RK Series
Series Pumps
Pumps
Operating
Operating Instructions
Instructions and
and Parts
Parts Manual
Manual
Plunger Pumps
Please read and save these instructions. Read carefully before attempting to assemble, install,
operate or maintain the product described. Protect yourself and others by observing all safety
information. Failure to comply with instructions could result in personal injury and/or property
damage! Retain instructions for future reference.
Description
Plunger Pumps are designed for a wide variety of high
pressure washing applications. They are constructed of
die-cast bodies and feature a forged brass head. Internal
components include special thick solid ceramic plungers
for long life and durability. Precision cast cooling fins
are anodized for maximum heat dissipation. Oversized
tapered roller bearings and the precision supports assure
proper shaft alignment and maximum life. Valve cages
of special designed Ultra-Form provide positive seating
and extended life. One-piece connecting rods are either
a special alloy aluminum or bronze oversized for strength
and load disbursement. These pumps are designed for
gearbox , belt drive, or coupling drive systems, electric
motor 182-184 frame driven systems, or gasoline engine
driven systems.
RK 1450 rpm N Version
Model
Max GPM Max PSI
RK11.14N
2.9
2000
RK11.20HN
2.9
2900
RK13.12N
3.43
1740
RK13.20HN
3.43
2900
RK14.16N
3.7
2300
RK15.15N
3.96
2200
RK15.20HN
3.96
2900
RK15.28HN
3.96
4000
RK18.20HN
4.75
2900
RK18.28H
4.75
4000
RK21.20HN
5.55
2900
RKA 1750 rpm N Version
Model
Max GPM Max PSI
RKA3.5G25N
3.5
2500
RKA3.5G30N
3.5
3000
RKA3.5G40HN
3.5
4000
RKA4G20N
4.0
2000
RKA4G30N
4.0
3000
RKA4G30HN
4.0
3000
RKA4G35N
4.0
3500
RKA4G40HN
4.0
4000
RKA4.5G17N
4.5
1700
RKA4.5G25HN
4.5
2500
RKA4.5G35HN
4.5
3500
RKA5.5G13N
5.5
1300
RKA5.5G20HN
5.5
2000
RKA5.5G30HN
5.5
3000
Figure 1 -RKHN
Figure 2 - RK-F17
Figure 3 - RK-F24
Model
Max GPM Max PSI
RKA6.5G20HN
6.6
2000
RKA7G20HN
7.1
2000
RKA 1750 rpm E Version 1-1/8”
Model
Max GPM Max PSI
RKA3.5G30E-F17
3.5
3000
RKA3.5G30HE-F17
3.5
3000
RKA3.5G40HE-F17
3.5
4000
RKA4G20E-F17
4.0
2000
RKA4G30E-F17
4.0
3000
RKA4G30HE-F17
4.0
3000
RKA5.5G13E-F17
5.5
1300
RKA6.5G20HE-F17
6.6
2000
RKA7G20HE-F17
7.1
2000
RKV 3400 rpm D Version - 1”
Model
Max GPM Max PSI
RKV3.5G30AD-F24 3.5
3000
RKV3.5G35D-F24
3.5
3500
RKV3.5G40HD-F24 3.5
4000
RKV4037
3.5
3700
RKV4G30AD-F24
4.0
3000
RKV4G32D-F24
4.0
3200
RKV4G35HD-F24
4.0
3500
RKV4G40HD-F24
4.0
4000
RKV4.5G22D-F24
4.5
2200
RKV4.5G40HD-F24 4.5
4000
RKV5G40HD-F24
5.0
4000
RKV5.5G40HD-F24 5.5
4000
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High
Performance
Pumps
RK Series Pumps
Operating Instructions and Parts Manual
Plunger
Pumps
2+
MM
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Nozzle
#
2.0
2.25
2.5
2.75
3.0
3.25
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.5
8.0
8.5
9.0
9.5
10.0
11.0
12.0
12.5
13.0
1000
PSI
1.00
1.13
1.25
1.38
1.50
1.63
1.75
2.00
2.25
2.50
2.75
3.00
3.25
3.50
3.75
4.00
4.25
4.50
4.75
5.00
5.50
6.00
6.25
6.50
12001400
PSI PSI
1.10 1.18
1.23 1.33
1.37 1.48
1.51 1.63
1.64 1.77
1.78 1.92
1.92 2.07
2.19 2.37
2.46 2.66
2.74 2.96
3.01 3.25
3.29 3.55
3.56 3.85
3.83 4.14
4.11 4.44
4.38 4.73
4.66 5.03
4.93 5.32
5.20 5.62
5.48 5.92
6.02 6.51
6.57 7.10
6.85 7.40
7.12 7.69
SPRAY NOZZLE CHART
Gallons Per Minute
1600 1800 2000 2200 2400 2600 2800 3000 3200 3400 3600 3700 4000 4200
PSI
PSI PSI PSI PSI
PSI PSI PSI PSI PSI
PSI
PSI PSI
PSI
1.26 1.34 1.41 1.48 1.55 1.61 1.67 1.73 1.79 1.84 1.90 1.92 2.00 2.05
1.42 1.51 1.59 1.67 1.74 1.81 1.88 1.95 2.01 2.07 2.13 2.16 2.25 2.31
1.58 1.68 1.77 1.85 1.94 2.02 2.09 2.17 2.24 2.30 2.37 2.40 2.50 2.56
1.74 1.84 1.94 2.04 2.13 2.22 2.30 2.38 2.46 2.54 2.61 2.64 2.75 2.82
1.90 2.01 2.12 2.22 2.32 2.42 2.51 2.60 2.68 2.77 2.85 2.89 3.00 3.07
2.06 2.18 2.30 2.41 2.52 2.62 2.72 2.81 2.91 3.00 3.08 3.13 3.25 3.33
2.21 2.35 2.47 2.60 2.71 2.82 2.93 3.03 3.13 3.23 3.32 3.37 3.50 3.59
2.53 2.68 2.83 2.97 3.10 3.22 3.35 3.46 3.58 3.69 3.79 3.85 4.00 4.10
2.85 3.02 3.18 3.34 3.49 3.63 3.76 3.90 4.02 4.15 4.27 4.33 4.50 4.61
3.16 3.35 3.54 3.71 3.87 4.03 4.18 4.33 4.47 4.61 4.74 4.81 5.00 5.12
3.48 3.69 3.89 4.08 4.26 4.43 4.60 4.76 4.92 5.07 5.22 5.29 5.50 5.64
3.79 4.02 4.24 4.45 4.65 4.84 5.02 5.20 5.37 5.53 5.69 5.77 6.00 6.15
4.11 4.36 4.60 4.82 5.03 5.24 5.44 5.63 5.81 5.99 6.17 6.25 6.50 6.66
4.43 4.70 4.95 5.19 5.42 5.64 5.86 6.06 6.26 6.45 6.64 6.73 7.00 7.17
4.74 5.03 5.30 5.56 5.81 6.05 6.27 6.50 6.71 6.91 7.12 7.21 7.50 7.69
5.06 5.37 5.66 5.93 6.20 6.45 6.69 6.93 7.16 7.38 7.59 7.69 8.00 8.20
5.38 5.70 6.01 6.30 6.58 6.85 7.11 7.36 7.60 7.84 8.06 8.18 8.50 8.71
5.69 6.04 6.36 6.67 6.97 7.26 7.53 7.79 8.05 8.30 8.54 8.66 9.00 9.22
6.01 6.37 6.72 7.05 7.36 7.66 7.95 8.23 8.50 8.76 9.01 9.14 9.50 9.73
6.32 6.71 7.07 7.42 7.75 8.06 8.37 8.66 8.94 9.22 9.49 9.62 10.00 10.25
6.96 7.38 7.78 8.16 8.52 8.87 9.20 9.53 9.84 10.14 10.44 10.58 11.00 11.27
7.59 8.05 8.49 8.90 9.30 9.67 10.04 10.39 10.7311.06 11.38 11.54 12.00 12.30
7.91 8.39 8.84 9.27 9.68 10.0810.46 10.83 11.1811.52 11.86 12.02 12.50 12.81
8.22 8.72 9.19 9.64 10.07 10.4810.88 11.26 11.6311.99 12.33 12.50 13.00 13.32
Operating Instructions and Parts Manual
4400
PSI
2.10
2.36
2.62
2.88
3.15
3.41
3.67
4.20
4.72
5.24
5.77
6.29
6.82
7.34
7.87
8.39
8.91
9.44
9.96
10.49
11.54
12.59
13.11
13.63
4600
PSI
2.14
2.41
2.68
2.95
3.22
3.49
3.75
4.29
4.83
5.36
5.90
6.43
6.97
7.51
8.04
8.58
9.12
9.65
10.19
10.72
11.80
12.87
13.40
13.94
RK Series Pumps
5000
PSI
2.40
2.52
2.80
3.07
3.35
3.63
3.91
4.47
5.03
5.59
6.15
6.71
7.27
7.83
8.39
8.94
9.50
10.06
10.62
11.18
12.30
13.42
13.98
14.53
Plunger Pumps
4800
PSI
2.19
2.46
2.74
3.01
3.29
3.56
3.83
4.38
4.93
5.48
6.02
6.57
7.12
7.67
8.22
8.76
9.31
9.86
10.41
10.95
12.05
13.15
13.69
14.24
Operating Instructions and Parts Manual
RK Series Pumps
First Choice When Quality Matters
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RK Series Pumps
Operating Instructions and Parts Manual
Plunger Pumps
Formulas
Nozzles:
Impact Force (lbs.) = .0526 x GPM x √PSI
Nozzle # = GPM x 4000
√ PSI
GPM= Nozzle # x
PSI
√4000
PSI = (GPM/Nozzle #)2 x 4000
Horse Power:
GPM x PSI = Hydraulic HP
1714
GPM x PSI = EBHP
1457
EBHP x 1457 = GPM
PSI
EBHP x 1457 = PSI
GPM
HP loss due to altitude = 3% per 1000 FT
above sea level
Pump Speed and Flow:
Rated GPM = Desired GPM
Rated RPM Desired RPM
Conversions
Gallons x 3.785412 = Liters
Gallons x 128 = Oz.
PSI x .06896 = Bar
Bar x 14.5038 = PSI
1 inches = 25.4 millimeters
Liters x .2642 = Gallons (US)
Ft. Lbs. x 1.356 = Newton Meters
Inch Lbs. x .11298 = Newton Meters
Newton Meters x .737562 = Ft. Lbs. (force)
Newton Meters x 8.85 = In. Lbs. (force)
Temperature = 1.8(C° + 17.78) = F°,.555(F°
- 32) = C°
1 U.S. Gallon of freshwater = 8.33 lbs.
1 PSI = 2.31 feet of water
1 PSI = 2.04 inches of mercury
1 Foot of water = .433 PSI
1 Foot of water = .885 inches of mercury
1 Meter of water = 3.28 feet of water
Kilograms x 2.2 = Lbs.
Motor Pulley Ø = Pump Pulley Ø
Pump RPM
Motor RPM
General Safety Information
WARNINGS
Gasoline Drive Pumps
The pump is designed to pump nonflammable or non-explosive fluids.
These pumps are intended to pump
clean filtered water only.
Do not operate in or around an
explosive environment.
Always wear safety glasses
or goggles and appropriate
clothing.
Do not alter the pump from the
manufacturers design.
Do not allow children to operate
the pump.
Never point the high-pressure
discharge at a person, any part of
the body or animals.
Do not operate gasoline engines in a
confined area; always have adequate
ventilation.
Do not exceed the pump
specifications in speed or pressure.
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RK Series Pumps
Operating Instructions and Parts Manual
Plunger Pumps
General Safety Information
(continued)
Maximum water temperature is
140°F.
All positive displacement plunger
pumps must have a safety relief valve
installed on the discharge side of the
pump, this valve could be either an
unloader or regulator and must be of
adequate flow and pressure for the
pump.
Adequate protective guards must
cover all moving parts. Perform
routine maintenance on the pump and
components.
Use only components that are rated
for the flow and pressure of the pump,
this would include hose, fittings, safety
valves, spray guns etc.
Electric Drive Pumps
Your power supply must conform to the
system requirements.
The motor must be grounded. Use
GFCI plugs and receivers.
Do not handle the pump/motor with
wet hands.
Only use power cords that are in
good condition.
Never pull the unit by the power
cord.
Special Features
Wet End
Manifold: Forged Brass: Strength
and no porosity – long life. higher
hydrostatic pressures – safety,
performance.
Inlet and Discharge Ports: Heavy
bosses for added strength. Offset
Discharge Ports: High efficiency,
smooth flow. Bolts: Eight bolts, 8mm,
grade 8.8.
Valves: Valve Caps: Stainless steel on
pumps rated at 3200 PSI and higher,
better hydrostatic loads. Machined
brass on pumps <3200 PSI. Ultra Form
Cages: Durable, strength, and long life.
Poppets, Seat and Spring: 303 and 400
series stainless steel.
Packing and Plungers: High Pressure
Packing: “V” style (D-1) Buna-N (cotton
duct weave base) strong and tightens
under load. Low Pressure Seals: “U”
cup double lip Buna-N for a good
positive seat. Support and Guides:
Machined brass, 1-piece construction
to assure proper plunger alignment
and to maximize packing and seal life.
Plungers: Are a special aluminum oxide
blend, solid ceramic for long life, strong
durability and more resilient.
Drive End
Never spray or clean the unit with water
Bearings: Oversized tapered roller
bearing for maximum life and load
disbursement.
Failure to follow these warnings
may result in personal injury or
damage to property.
Bearing Support: Precision die-cast
and machined to assure concentricity
and alignment.
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Operating Instructions and Parts Manual
Plunger Pumps
Special Features (continued)
Extra Features
Crankcase: Precision die-cast,
large cooling fins and anodized (for
maximum heat dissipation).
Dyno Proven: All pumps are dyno
tested to assure the theoretical design
meets the actual design.
Rear Cover: Precision die-cast, O-ring
sealed and bayonet style sight glass for
positive sealing and locking (no threads
to loosen).
Valve Design: Each pump series has a
valve design that optimizes its highest
efficiency.
Plunger Rods: Stainless steel
construction for strength (no plating to
scrape off), back-up and O-ring plunger
sealing system.
Rod Pins: Precision ground and
hardened steel, oversized for load
disbursement.
Connecting Rods: One-piece special
allow aluminum (3XU51, 3XU60 and
3XU68) or bronze (3XU52, 3XU54,
3XU61and 3XU62) for higher pressure,
oversized for maximum strength, load
disbursement, and life. Heavy pin area
construction, for added load strength.
Crankshaft: Forged, precision ground
and hardened for extremely long life
and durability.
Oil Seals and O-rings: Triple lip oil
seals, long life and much less leak
prone. All are constructed of BunaN rubber. The O-rings have stainless
steel garder springs to assure constant
tension on the sealing surface.
Oil Drains: Quantity of two (2). One in
the rear cover and one in the bottom of
the crankcase.
Oil Capacity: 15.5 oz.
Installation
Direct Drive Electric and Gasoline
Pumps
1. Install the shaft key into the
keyway and apply a light coating
of anti-seize on the
engine shaft.
2. Align the two key
ways and push the
pump completely
onto the engine. (See
Figure 4 & 5)
Figure 4
3. Install all four (4)
bolts and tighten
evenly.
4. Remove the red
shipping oil cap
and install the black
crankcase vent cap.
(See Figure 6)
Figure 5
5. Install the
appropriate
unloader valve and
other accessories.
Figure 6
6. Install the appropriate water inlet
and discharge fittings.
7. Connect the water supply hose and
high-pressure discharge hose/spray
gun.
8. Turn on the water supply.
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Operating Instructions and Parts Manual
Plunger Pumps
Installation (continued)
9. Open the spray gun to purge the
system of any air.
10. Start the engine.
11. Adjust the engine speed and
unloader valve.
Belt Drive Systems
1. Mount the pump
securely to the base
plate. (See Figure 7)
For new installation
a mounting rail kit
is required, refer to parts
breakdown.
3. Flush the pump with fresh water
before the next use.
4. In freezing conditions failure to
do this may cause internal pump
damage.
5. For long periods of storage in
non-freezing areas the solution
will keep the seals and O-rings
lubricated.
Service Pumps
Servicing the Valves
2. Install the pump pulley on the
crankshaft. It should be
as far onto the shaft as
possible.
The inlet and discharge valves in this
series pumps are all the same. The
valves are located under the six 24mm
hex plugs. The inlet valves are located
on the lower row and the discharge
valves are located on the top row of the
pump head.
3. Align the pulleys so they
are in line. (See Figure
8)
Tools required: 24mm socket, ratchet,
needle nose pliers, mechanics pick and
torque wrench.
4. Use a belt tension
gauge to assure
proper tension
(too much tension
can cause bearing
failure or damage
the belts as well as
cause other problems).
(See Figure 9)
Figure 7
Figure 8
Valve Removal:
1. Remove the valve cap.
Figure 9
5. Installation complete.
Winter or Long Time Storage
1. Drain all of the water out of the
pump.
2. Run a 50% solution of a RV or
non-toxic/biodegradable antifreeze
through the pump.
2. Inspect the
valve cap Oring for any
damage, replace
if necessary. (See
Figure 10)
3. Use the needle nose
pliers to remove the
valve. (See Figure
11)
Figure 10
Figure 11
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Operating Instructions and Parts Manual
Plunger Pumps
Service Pumps (continued)
4. Use a small probe to
move the poppet up
and down to assure
that the valve is
functioning properly
and that no debris is
stuck in the valve. (See
Figure 12)
Tools required: 6mm hex socket, ratchet,
(2) long screwdrivers, reversible pliers,
mechanics pick and torque wrench.
Disassembly:
1. First remove the eight 6mm head
bolts. (See Figure 17)
Figure 12
2. Place the screwdrivers
as shown between the
head and crankcase of the
pump, lifting one up and
the other down. The head
should start to lift off of Figure 17
the plungers. (See
Figure 18)
5. Using the
mechanics pick
remove the
valve seat O-ring
and inspect for
Figure 13
any damage, replace if
3. When you remove
necessary. (See Figure 13)
the head you may
Valve Assembly:
notice that some of
the water seals have
1. Install the valve
stayed on the plungers
Figure 18
seat O-ring
and some in
squarely into the
the head. (See
bottom of the
Figure 19) To
manifold. (See
remove the
Figure 14)
seals from the
Figure
14
2. Insert the valve assembly
plungers simple
squarely into the
Figure 19
turn the assemblies and
port pushing it into
pull off.
the O-ring. (See
4.
If the seal assemblies are in the
Figure 15)
head use the reversible pliers to
3. Install the valve cap
grab the seal retainer
and torque to the
Figure 15
on the inside bore
proper specification.
(NOTE: Use a rag so
(See Figure 16) (See
you do not mar the
parts breakdown)
piston guide area),
Servicing the
twist the retainer in
Figure 20
Packings/Seals
either direction
To access the water
seals for inspection or
replacement, you will first
Figure 16
need to remove the head of
the pump.
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RK Series Pumps
Operating Instructions and Parts Manual
Plunger Pumps
Service Pumps (continued)
(NOTE: This is done
to free the retainer
O-ring which is stuck
to the manifold) and
lift out. (See Figure
20 & 21)
5. With your fingers
pull the high pressure
seal and head ring
out of the head. (See
Figure 22)
6. The low-pressure seal
is located in the brass
seal retainer. Using
the mechanics
pick go in
between the
seal and retainer,
twist and pull, the
seal will come out
of the gland. (See
Figure 23 & 24)
7. Remove the seal
retainer O-ring with
the mechanics pick. (See
Figure 25)
Assembly:
1. Install the plastic
head ring into the
head (the flat side is
on the bottom). (See
Figure 26)
2. Install the highpressure seal. Place
the seal so the open
“V” portion is toward
the head ring. You
need to place the
Figure 21
seal at an angle and
pull and push to
work the seal into
position with your
fingers (do not use
and tools you may
damage the seal).
Make sure the seal is
totally seated
against the head
ring. (See Figure
27 & 28)
Figure 27
3. Installing the
low-pressure seal.
You want the open
side of the seal to
Figure 22
be pointed toward
the water side of
the head (toward the
high-pressure seal) and
the flat side toward the
drive end of the pump.
Figure 23
Place the seal into the
gland at an angle, with
your finger push the
exposed side of the
seal towards the center
Figure 24
and work the seal (See
Figure 29, 30 & 31) into
position. After the seal
is in the gland you can
work it into it proper
position.
Figure 28
Figure 29
Figure 30
Figure 25 4. Install the retainer O-ring.
Figure 31
(See Figure 32)
Figure 26
Figure 32
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RK Series Pumps
Operating Instructions and Parts Manual
Plunger Pumps
Service Pumps (continued)
3. Twist and pull the plunger
off the plunger rod.
5. Squarely seat the
4. Remove the plunger
retainer into the head
rod O-ring seal and split
and push with even
back-up ring with the
pressure until it snaps
Figure 36
mechanics pick. (See Figure
into position. (See Figure Figure 33
36 & 37)
33)
5. Remove brass slinger.
Servicing the Plungers
At this point clean any
If the plungers are not damaged they
thread locker that is
do not need any servicing.
left on the plunger
Figure 37
Tools required: 16mm socket, ratchet,
rod and retaining nut
mechanics pick, taper blade gasket
threads. (See Figure
scraper, thread sealant and torque
38)
wrench.
NOTE: Be very careful when working
with the plungers, they are made from
ceramic which is brittle and can be
damaged.
Any time you remove a plunger it is
recommended you replace the slinger
washer, O-ring and top plunger washer.
The washers are a cushion for the
ceramic plunger and compress when
first used and the O-ring will take a
set to create a seal and usually will not
spring back to its original shape. By not
replacing these parts you run the risk of
breaking a plunger or having a
water leak.
Disassembly:
1. Remove the plunger
retainer nut. (See
Figure 34)
Assembly:
1. Install the slinger
washer. (See Figure
39)
2. Install the plunger
rod O-ring and split
back-up ring. Place a
Figure 39
light film of oil on the Oring and back-up ring.
(See Figure 40)
NOTE: The O-ring is
closest to the threaded
end of the rod.
3. Install the plunger by
pushing straight down
and twisting slightly
in either direction
(See Figure 41)
Figure 34 2. Insert the gasket scraper
between the copper
washer and plunger to
remove the washer. (See
Figure 35)
Figure 38
Figure 40
(NOTE: Be sure that
Figure 41
the back-up ring is fully
seated). Make sure you fully seat
the plunger.
Figure 35
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RK Series Pumps
Operating Instructions and Parts Manual
Plunger Pumps
Service Pumps (continued)
Oil Change
4. Install the small copChange oil after first 50 hours of use.
per washer on top
Then every 500 hours. Refer to parts
of the plunger and
breakdown for oil type.
place a small quantity
of thread sealant in the Figure 42
thread. Install the plunger
nut and tighten to the
required torque. (See
Figure 42 & 43) (See parts
breakdown)
Pump head to drive end
Installation
Figure 43
1. Turn the crankshaft to
align the plungers as
shown. (See Figure 44)
2. Place the head evenly
onto the plungers and
push it until it makes
contact with the drive
end of the pump. (See
Figure 45)
3. Torque the head
bolt as shown in the
tightening sequence
diagram. (See Figure
46 & 47) (See parts breakdown).
Figure 44
Figure 45
Figure 46
Figure 47
NORTH
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First Choice When Quality Matters
RK Series Pumps
Operating Instructions and Parts Manual
Plunger Pumps
Troubleshooting
Symptom
Possible Cause(s)
Oil leak between
crankcase and pumping section
Frequent or premature failure of the
packing
Worn rod oil seals
Corrective Action
Replace crankcase piston rod
seals
1
Cracked, damaged or worn
plunger
1
Replace plungers
2
Overpressure to inlet
manifold
2
Reduce inlet pressure
3
Material in the fluid being
pumped
3
Install proper filtration on pump
inlet plumbing
4
Excessive pressure and/or
temperature of fluid being
pumped
4
Check pressures and fluid inlet
temperature; be sure they are
within specified range
5
Running pump dry
5
Do not run pump without water
Pump runs but produces no flow
Pump is not primed
Flood suction then restart pump
Pump fails to prime
Air is trapped inside pump
Disconnect discharge hose from
pump. Flood suction hose,
restart pump and run pump until
all air has been evacuated
Pump looses prime,
chattering noise,
pressure fluctuates
Low pressure at
nozzle
Pressure gauge fluctuates
Low pressure
1
Air leak in suction hose or
inlet
1
Remove suction line and inspect
it for a loose liner or debris
lodged in hose. Avoid all unnecessary bends. Do not kink hose
2
Clogged suction strainer
2
Clean strainer
1
Unloader valve is by-passing
1
Make sure unloader is adjusted
property and by-pass seat is not
leaking
2
Incorrect or worn nozzle
2
Make sure nozzle is matched
to the flow and pressure of the
pump. If the nozzle is worn,
replace
3
Worn packing or valves
3
Replace packing or valves
1
Valves worn or blocked by
foreign bodies
1
Clean or replace valves
2
Packing worn
2
Replace packing
1
Worn nozzle
1
Replace with nozzle of proper
size
2
Belt slippage
2
Tighten or replace with correct
belt
NORTH
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First Choice When Quality Matters
RK Series Pumps
Operating Instructions and Parts Manual
Plunger Pumps
Troubleshooting (cont.)
Symptom
Low pressure (cont.)
Pump runs extremely
rough, pressure very
low
Possible Cause(s)
Air leak in inlet plumbing
3
Disassemble, reseal and reassemble
4
Relief valve stuck, partially
plugged or improperly
adjusted valve seat worn
4
Clean and adjust relief valve;
check for worn or dirty valve
seats
5
Worn packing. Abrasive
in pumped in cavitation.
Inadequate water
5
Install proper filter suction at
inlet manifold must be limited to
lifting less than 20 feet of water
or 8.5 psi vacuum
6
Worn inlet, discharge valve
blocked or dirty
6
Replace inlet and discharge valve
1
Inlet restrictions and/or air
leaks.
1
Clean out foreign material
2
Stuck inlet or discharge
valve
2
Replace worn valves
Water leakage from
under manifold
Slight leak, oil leaking in the area of
crankshaft
Worn packing or cracked
plunger
Loud knocking noise
in pump
Install new packing or plunger
1
Worn crankshaft seal or
improperly installed oil seal
o-ring
1
Remove oil seal retainer and
replace damaged 0-ring and/or
seals
2
Bad bearing
2
Replace bearing
Excessive play in the
end of the crankshaft
pulley
Water in crankcase
Corrective Action
3
Worn main bearing from
excessive tension on drive
belt
Replace crankcase bearing and/or
tension drive belt
1
Humid air condensing into
water inside the crankcase
1
Change oil intervals
2
Worn packing and/or
cracked plunger
2
Replace packing. Replace
plunger
1
Cavitation or sucking air
1
Check water supply is turned on
2
Pulley loose on crankshaft
2
Check key and tighten set screw
3
Broken or worn bearing
3
Replace bearing
NORTH
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First Choice When Quality Matters
RK Series Pumps
Operating Instructions and Parts Manual
RK
1450 rpm Pumps
Plunger
34
17
29
18
40
22
19
21
20
24
2
1
3
4
11
12
14 15
13
3
1
25
27
26
43
28
42
87
23
38
42
77
26(3)
39 19 41
4(6)
17
2
50
32
49
47
78
44(6)(6)
Repair Kits
2727
(3)
(3)
2626
(3)
(3)
2525
(3)
(3)
2424
(3)
3131
(3)
(3)
(3)
Pistons
Pistons
KitKit
2546
- Ø-18
2546
Ø 18
2323
(3)
(3) Kit 2547 - Ø 20
Kit 2547 - Ø 20
KitKit
2759
- Ø-22
2759
Ø 22
1515
(3)
(3)
31(3)
16(3)
19(2) Oil Seals
Kit 1855
34
34
39
39
14(3)(3)
14
12(3)(3)
12
34
39
WaterSeals
Seals
Water
Kit1857
1857- -Ø Ø18
18
Kit
Kit
1887
20
Kit 1887 - -Ø Ø20
Kit1888
1888- -Ø Ø22
22
Kit
11(3)
16(3)(3)
16
19(2)(2) Oil Seals
19
Oil Seals
Kit1855
1855
Kit
Support Rings
Kit 1829 - Ø 18
Kit 1815 - Ø 20
Kit 1816 - Ø 22
3434
1414
(3)
(3)
1212
(3)
(3)
27(3)
26(3)(3)27(3)
26
25
(3)
14(3)
25(3)
24(3)(3)
31(3)(3)
12(3)24
31
Water Seals
Pistons
Kit 1857
- Ø 18
Pistons
Kit2546
2546
-Ø Ø18
18
KitKit
1887
- Ø -20
23(3)(3)
23
Kit2547
2547
-Ø Ø20
20
KitKit
1888
- Ø -22
Kit
2759
Ø
22
Kit 2759 - Ø 22
15(3)(3)
15
27(3)
Pistons
Kit 2546 - Ø 18
Kit 2547 - Ø 20
Kit 2759 - Ø 22
15(3)
48
Valves
Valves
Kit2864
2864
Kit
Valves
Valves
KitKit
2864
2864
23(3)
44
33(6)(6)
4(6)
3(6)3(6) 4(6)
24(3)
Valves
Kit 2864
4
89
25(3)
3(6)
43
46
88
"N" VERSION
37
42
86
35
31
16
45
5 6
36
30
Water
Seals
Water
Seals
KitKit
1857
- Ø-18
1857
Ø 18
KitKit
1887
- Ø-20
1887
Ø 20
KitKit
1888
- Ø-22
1888
Ø 22
3939
Special Parts / Kits
1616
(3)
(3)
Code
Description
1919
(2)
(2)Oil Seals
Oil Seals
2809
Viton water seals Ø18
KitKit
1855
2810
Viton
water seals Ø20
1855
2811
2819
2820
1837
2633
2633H
1111
(3)
(3)
Viton water seals Ø22
Kit for up to 180° F Ø18 High Temp
Kit for up to 180° F Ø20 High Temp
Rail Kit 5/8” - 2 Rails & 4 Bolts
Rail Kit 1-3/4” - 2 Rails & 4 Bolts
Rail Kit 2-5/8” - 2 Rails & 4 Bolts
11(3)(3)
11
Qty. Rings
Support
Rings
Support
1 - -Ø Ø18
Kit1829
1829
18
Kit
1
Kit1815
1815- -Ø Ø20
20
Kit
Kit1816
1816
22
1 - -Ø Ø22
Kit
1
1
1
1
1
Support
Rings
Support
Rings
KitKit
1829
- Ø-18
1829
Ø 18
KitKit
1815
Ø 20
1815 - Ø 20
KitKit
1816
- Ø-22
1816
Ø 22
NORTH
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First Choice When Quality Matters
RK Series Pumps
Operating Instructions and Parts Manual
Plunger Pumps
Pos. Code Description
2
1
3
4
6
14
16
17
18
19
20
21
22
23
24
26
27
28
29
31
32
34
35
36
38
39
5
11
12
13
15
25
30
37
960160
960090
960850
1380740
960090T
960850T
1389051
880830
880581
1380690
820510
960110
840300
840320
880320
840290
840330
1380090
1380150
1380160
961240
880330
840280
840340
1383130
850370
1380050
640030
2280240
1382770
880130
962010
962000
1380940
1380930
1382360
1380950
600180
1380920
1380060
1383020
1383050
1080401
1381850
1780510
1789010
1343510
2280070
2280060
1380520
180340
Qty.
O-Ring Ø17.86x2.62
6
Valve cap - Brass
(478 in/lbs) 6
Valve cap - SS
(478 in/lbs) F 6
Valve cap - NP
(478 in/lbs) 6
Valve cap - 1/4” threaded - Brass (478 in/lbs) 1
Valve cap - 1/4” threaded - SS (478 in/lbs) 1
Complete valve
6
O-Ring Ø15.54x2.62
6
Plug 1/4” G - Brass
2
Plug 1/4” G NP
F2
O-Ring Ø10.82x1.78
2
Support ring
Ø18 n 3
Support ring
Ø20³ 3
Support ring
Ø22« 3
High pressure packing
Ø18 n 3
High pressure packing
Ø20³ 3
High pressure packing
Ø22« 3
Piston guide
Ø18 n 3
Piston guide
Ø20 3
Piston guide
Ø22« 3
O-Ring Ø31.47x1.78
3
Low pressure seal
Ø18 n 3
Low pressure seal
Ø20³ 3
Low pressure seal
Ø22« 3
Oil seal
3
Bolt M8x16
(217 in/lbs) 8
Closed bearing support
1
O-Ring Ø59.99x2.62
2
Bearing
1
Pump housing
1
Vented oil cap
1
Nut M8
(106 in/lbs) 3
Washer Ø8.1
3
Ceramic piston
Ø18 n 3
Ceramic piston
Ø20³ 3
Ceramic piston
Ø22« 3
Spacer
3
O-Ring Ø7.66x1.78
3
Guiding piston
3
Piston pin
3
Con rod - Bronze > 3000 PSI
3
Con rod - Aluminum < 3000 PSI
3
Back-up ring
3
Washer
8
O-Ring
1
Complete cover
1
Bolt M6x14
(89 in/lbs) 6
Crankshaft 24mm
«1
Crankshaft 24mm
n³ 1
Key
1
Oil seal
1
Pos. Code Description
40
1380120
1380130
1380530
1382810
41 1380040
42 740290
43 1980740
44 1260470
1380141
Z-Bracket 1-3/4
Z-Bracket
1980740
1981180
47 180101
820361
960870
1381070
1381071
1380020
1380680
50 820150
77 840370
1389270
1389272
1389271
1389212
1389220
86 1260250
87 1260430
88 1780690
89 1140450
45
46
48
49
78
Qty.
Shim 0.10 mm
Shim 0.20 mm
Shim 0.25 mm
Shim 0.05 mm
Open bearing support
O-Ring Ø14x1.78 Plug 3/8” G
Bolt M8x10
Rail 5/8”
Rail 1-3/4”
Rail 2-5/8”
Plug 3/8” G
Plug 3/8” G NP
O-Ring Ø17.5x2
Plug 1/2” G
Plug 1/2” G NP
Pump head - NP
Pump head - Brass
Pump head - Brass
Pump head - NP
Head bolt M8x70
Bearing
Complete pump head
Complete pump head
Complete pump head
Complete pump head
Complete pump head
Oil sight glass
Snap ring
Contrast disc
O-Ring Ø20.24x2.62
1-3
1-3
1-3
1-3
(217 in/lbs) 1
3
2
4
2
2
2
1
F1
1
1
F1
Ø18 F 1
Ø18 1
Ø20-22 1
Ø20-22 1
(217 in/lbs) 8
1
Ø18 1
Ø18 H 1
Ø18 F 1
Ø20 H 1
Ø22 H 1
1
1
1
1
AR64516 Oil
Oil Capacity - 15 oz
1
Legend
Ø 18
For n
Ø
20
Ø
22
For ³
RK15.15
RK18.20H
RK15.20H
RK18.28H F
RK15.28HF
For «
RK21.20H
FOver 3600psi
NORTH
AMERICA
First Choice When Quality Matters
RK Series Pumps
Operating Instructions and Parts Manual
RKA
1750 rpm Pumps
Plunger
17
18
40
19
22
20
21
23
24
25
28
27
26
29
30
34
36
86
43
42
35
87
88
89
75
78
2
1
3
4
5
3
1
11
12
13
59
16
15
14
60
37
38
42
6
39
43
45
4
3(6)
19 41
17
42
2
69
50
49
"E" VERSION
27(3)
26(3)
63
1725(3)
64
24(3)
4(6)
44
"N" VERSION
47
62
Valves
Kit 2864
77
46
61
75(3)
Pistons
Kit 2546 - Ø 18
Kit 2547 - Ø 20
Kit 2759 -65
Ø 22
23(3)
TYPE F17
15(3)
48
61
27(3)
26(3)(3)27(3)
26
34
25(3)(3)
25
44(6)(6)
33(6)(6)
Valves
Valves
Repair
Kits
Kit 2864
Kit 2864
2727
(3) (3)
2626
(3) (3)
2525
(3) (3)
2424
(3) (3)
7575
(3) (3)
4(6)4(6)
3(6)3(6)
Valves
Valves
KitKit
2864
2864
Pistons
Pistons
KitKit
2546
- Ø-18
2546
Ø 18
2323
(3) (3) Kit 2547 - Ø 20
Kit 2547 - Ø 20
KitKit
2759
- Ø-22
2759
Ø 22
6161
1515
(3) (3)
Water
Seals
Water
Seals
KitKit
1857
- Ø-18
1857
Ø 18
KitKit
1887
1887Ø-20
Ø 20
KitKit
1888
- Ø-22
1888
Ø 22
Code
2809
2810
2811
2819
2820
1837
2633
2633H
61
61
15(3)(3)
15
WaterSeals
Seals
Water
Kit1857
1857- -Ø Ø18
18
Kit
Kit
1887
20
Kit 1887 - -Ø Ø20
Kit1888
1888- -Ø Ø22
22
Kit
16(3) 19
Oil Seals
Kit 1855 - N
Kit 1856 - E
34
34
62(E)(E)
62
14(3)(3)
14
12(3)(3)
12
11(3)
16(3)(3)19
19
16
Support Rings
Kit 1829 - Ø 18
Kit 1815 - Ø 20
Kit 1816 - Ø 22
OilSeals
Seals
Oil
Kit1855
1855- -NN
Kit
Kit1856
1856- -EE
Kit
3434
6262
(E) (E)
1414
(3) (3)
1212
(3) (3)
14(3)
24(3)
75(3)(3)
75
12(3)24(3)
Water
Seals
Pistons
Pistons
KitKit
1857
- Ø -18
Kit
2546
-Ø Ø18
18
2546
23(3)(3)
KitKit
1887
- Ø -20
Kit
2547
-Ø Ø20
20
23
2547
KitKit
1888
- Ø -22
Kit
2759
-Ø Ø22
22
2759
62(E)
1616
(3) (3)
1919
OilOil
Seals
Seals
KitKit
1855
- N- N
1855
KitKit
1856
- E- E
1856
Special Parts / Kits
Description
Viton water seals Ø18
Viton water seals Ø20
Viton water seals Ø22
Kit for up to 180° F Ø18 High Temp
(3)Ø(3)
Kit for up to 180°11F11
20 High Temp
Rail Kit 5/8” - 2 Rails & 4 Bolts (N only) Support
Rings
Support
Rings
Rail Kit 1-3/4” - 2 Rails
& 4 Bolts
(N only)
KitKit
1829
- Ø-18
Ø (N
18only)
Rail Kit 2-5/8” - 2 Rails
&1829
4 Bolts
Kit 1815 - Ø 20
Kit 1815 - Ø 20
KitKit
1816
- Ø-22
1816
Ø 22
Legend
Ø 18
For m
Qty.
1
1
1
1
1
1
1
1
Ø
11(3)(3)
11
18
Ø
20
Ø
22
Support
Rings
Support
Rings
For
l
For n
For ³
Kit1829
1829- -Ø Ø18
18
Kit
RKA3.5G22 RKA4G20
RKA5.5G13
RKA6.5G13
Kit1815
1815- -Ø Ø20
20
Kit
Kit1816
1816- -Ø Ø22
22
RKA3.5G25 RKA4G30A
RKA5.5G20H
RKA6.5G20H
Kit
RKA3.5G30H RKA4G30
RKA5.5G26H
RKA3.5G40H RKA4G30H RKA5.5G30H
RKA4G35H
For «
RKA4G40HF
RKA7G13
For r
RKA7G20H
RKA4.5G17 RKA4.5G25H For u
RKA4.5G30HFRKA4G35NL
RKA4.5G35H
RKA4.5G40HF
FOver 3600psi
NORTH
AMERICA
First Choice When Quality Matters
RK Series Pumps
Operating Instructions and Parts Manual
Plunger Pumps
Pos. Code Description
2
1
3
4
6
14
16
17
18
19
20
21
22
23
24
26
27
28
29
34
35
36
38
39
5
11
12
13
15
25
30
37
40
960160
960090
960850
1380740
960090T
960850T
1389051
880830
880581
1380690
820510
960110
840300
840320
880320
840290
840330
1380090
1380150
1380160
961240
880330
840280
840340
1383130
850370
1380050
640030
2280240
1382770
880130
962010
962000
1380940
1380930
1382360
1380950
600180
1380920
1380060
1383020
1383050
1780510
1789010
1343510
2280100
2280090
2280070
2280060
2280110
1380520
180340
1380120
1380130
1380530
1382810
Qty.
O-Ring Ø17.86x2.62
6
Valve cap - Brass
(478 in/lbs) 6
Valve cap - SS
(478 in/lbs)F 6
Valve cap - NP
(478 in/lbs) 6
Valve cap - 1/4” threaded - Brass(478 in/lbs) 1
Valve cap - 1/4” threaded - SS (478 in/lbs) 1
Complete valve
6
O-Ring Ø15.54x2.62
6
Plug 1/4” G - Brass
2
Plug 1/4” G NP
F2
O-Ring Ø10.82x1.78
2
Support ring
Ø18 mrlu 3
Support ring
Ø20 n 3
Support ring
Ø22 ³« 3
High pressure packing Ø18 mrlu 3
High pressure packing
Ø20 n 3
High pressure packing Ø22 ³« 3
Piston guide
Ø18 mrlu 3
Piston guide
Ø20 n 3
Piston guide
Ø22 ³« 3
O-Ring Ø31.47x1.78
3
Low pressure seal Ø18 mrlu 3
Low pressure seal
Ø20 n 3
Low pressure seal Ø22 ³« 3
Oil seal
3
Bolt M8x16
(217 in/lbs) 8
Closed bearing support
1
O-Ring Ø59.99x2.62
2
Bearing
1
Pump housing
1
Vented oil cap
1
Nut M8
(106in/lbs) 3
Washer Ø8.1
3
Ceramic piston Ø18 mrlu 3
Ceramic piston
Ø20 n 3
Ceramic piston
Ø22 ³« 3
Slinger
3
O-Ring Ø7.66x1.78
3
Guiding piston
3
Piston pin
3
Con rod - Bronze > 3000 PSI
3
Con rod - Aluminum < 3000 PSI 3
O-Ring
1
Complete cover
1
Bolt M6x14
(89 in/lbs) 6
Crankshaft 24mm
m1
Crankshaft 24mm
l1
Crankshaft 24mm
rn³ 1
Crankshaft 24mm
«1
Crankshaft 24mm - NL u1
Key
1
Oil seal
1
Shim 0.10 mm
1-3
Shim 0.20 mm
1-3
Shim 0.25 mm
1-3
Shim 0.05 mm
1-3
Pos. Code Description
41 1380040
42 740290
43 1980740
44 1260470
1380141
Z-Bracket 1-3/4
Z-Bracket
1980740
1981180
47 180101
820361
960870
1381071
1381070
1380020
1380680
1383010
1383310
50 820150
2280260
2280200
2280270
2280280
60 1380320
61 621170
62 1380220
63 1380210
64
1591
65 620610
69 1381850
1389270
1389272
1389271
1389208
1389212
1389268
1389269
75 1080401
77 840370
86 1260250
87 1260430
88 1780690
89 1140450
45
46
48
49
59
71
Qty.
Open bearing support(217 in/lbs) 1
O-Ring Ø14x1.78 3
Plug 3/8” G
2
Bolt M8x10
4
Rail 5/8”
(N Version only) 2
Rail 1-3/4”
(N Version only) 2
Rail 2-5/8”
(N Version only) 2
Plug 3/8” G
1
Plug 3/8” G NP
F1
O-Ring Ø17.5x2
1
Plug 1/2” G
1
Plug 1/2” G NP
F1
Pump head - Brass
Ø18 1
Pump head - NP
Ø18 F 1
Pump head - Brass
Ø20 1
Pump head - NP
Ø20 1
Pump head - Brass
Ø22 1
Pump head -NP
Ø22 1
Head bolt M8x70
(217 in/lbs) 8
Hollow shaft Ø1-1/8”
m1
Hollow shaft Ø1-1/8”
lu 1
Hollow shaft Ø1-1/8”
n³ 1
Hollow shaft Ø1-1/8”
«1
Bearing
1
Oil seal
1
O-Ring Ø72.75x1.78
1
Compete cover
1
Electric Flange F17
1
Bolt
4
Washer
8
Complete pump head - Brass Ø18 1
Complete pump head - NP Ø18 1
Complete pump head - NP Ø18 F 1
Complete pump head - Brass Ø20 1
Complete pump head - NP Ø20 1
Complete pump head - Brass Ø22 1
Complete pump head - NP Ø22 1
Back-up ring
3
Bearing
1
Oil sight glass
1
Snap ring
1
Contrast disc
1
O-Ring Ø20.24x2.62
1
AR64516 Oil
Oil Capacity - 15 oz
1
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First Choice When Quality Matters
RK Series Pumps
Operating Instructions and Parts Manual
RKV
3400 rpm Pumps
Plunger
17
30
29
18
40
28
22
19
36
34
20
21
24
23
25
26
27
35 42
43
75
86
2
1
3
4
13
14
15
69
73
"D" VERSION
60
43
61
3(6)
71
4(6)62
Valves
Kit 1828
42
4
1
27(3)
88
26(3) 89
87
25(3)
42
6
5
3
11
12
16
24(3)
75(3)
Pistons
Kit 2546
23(3)
46
2
50
72
15(3)
49
47
48
77
33(6)(6)
25(3)(3)
25
24(3)
12(3)24(3)
44(6)(6)
Valves
Valves
Kit1828
1828
Kit
Repair Kits
4(6)4(6)
3(6)3(6)
Valves
Valves
KitKit
1828
1828
2727
(3)
(3)
2626
(3)
(3)
2525
(3)
(3)
2424
(3)
7575
(3)
(3)
(3)
Pistons
Pistons
KitKit
2546
2546
2323
(3)
(3)
6161
1515
(3)
(3)
Water
Seals
Water
Seals
KitKit
1857
1857
23(3)(3)
23
WaterSeals
Seals
Water
Kit1857
1857
Kit
62
16(3) 19
62
62
16(3)(3) 19
19
16
Oil Seals
Kit 1856
34
34
14(3)(3)
14
12(3)(3)
12
34
7570
(3)
75
(3)
Water Pistons
Seals
Pistons
Kit 1857
Kit2546
2546
Kit
61
61
15(3)(3)
15
14(3)
61
TYPE F24
OilSeals
Seals
Oil
Kit1856
1856
Kit
11(3)
Support Rings
Kit 1829
3434
6262
1414
(3)
(3)
1212
(3)
(3)
27(3)
26(3)(3)27(3)
26
1616
(3) 19
(3) 19
11(3)(3)
11
Special Parts / Kits
OilOil
Seals
Seals
KitKit
1856
1856
Code
2809
2819
Description
SupportRings
Rings
Support
Kit1829
1829
Kit
Qty.
Viton water seals Ø18
1
Kit for up to 180° F Ø18 High Temp 1
1111
(3)
(3)
Support
Rings
Support
Rings
KitKit
1829
1829
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First Choice When Quality Matters
RK Series Pumps
Operating Instructions and Parts Manual
Plunger Pumps
Pos. Code Description
2
1 960160
960090
960850
960090T
960850T
3 889052
4 880830
880581
1380690
6 820510
11 960110
12 880320
13 1380090
14 961240
15 880330
16 1383130
17 850370
18 1380050
19 640030
20 2280240
21 1382770
22 880130
23 962010
24 962000
25 1380940
26 1380950
27 600180
28 1380920
29 1380060
1383020
1383050
34 1780510
35 1789010
36 1343510
1380120
1380130
1380530
1382810
42 740290
43 1980740
1980740
1981180
47 180101
820361
960870
1381071
1381070
50 820150
60 1380320
61 621170
62 1380220
5
30
40
46
48
49
Qty.
O-Ring Ø17.86x2.62
6
Valve cap - Brass (478 in/lbs) ml 6
Valve cap - SS (478 in/lbs) ³n«ux 6
Valve cap - 1/4” threaded - Brass(478 in/lbs) 1
Valve cap - 1/4” threaded - SS (478 in/lbs) 1
Complete valve
6
O-Ring Ø15.54x2.62
6
Plug 1/4” G - Brass
mln 2
Plug 1/4” G - NP
³«ux 2
O-Ring Ø10.82x1.78
2
Support ring
3
High pressure packing
3
Piston guide
3
O-Ring Ø31.47x1.78
3
Gasket
3
Oil seal
3
Bolt M8x16
(217in/lbs) 8
Closed bearing support
1
O-Ring Ø59.99x2.62
2
Bearing
1
Pump housing
1
Vented oil cap
1
Nut M8
(106 in/lbs) 3
Washer Ø8.1
3
Ceramic piston
3
Slinger
3
O-Ring Ø7.66x1.78
3
Guiding piston
3
Piston pin
3
Con rod - Bronze
3
Con rod - Aluminum
3
O-Ring
1
Complete cover
1
Bolt M6x14
(89 in/lbs) 6
Shim 0.10 mm
1-3
Shim 0.20 mm
1-3
Shim 0.25 mm
1-3
Shim 0.05 mm
1-3
O-Ring Ø14x1.78 3
Plug 3/8” G - Brass
2
Plug 3/8” G - Brass
mln 1
Plug 3/8” G - NP
³«ux 1
O-Ring Ø17.5x2
1
Plug 1/2” G - Brass
mln 1
Plug 1/2” G - NP
³«ux 1
Pump head - Brass
mln 1
Pump head - NP
³«ux 1
Head bolt M8x70
(217 in/lbs) 8
Bearing
1
Oil seal
1
O-Ring Ø72.75x1.78
1
Pos. Code Description
69
2280140
2280130
2280590
2280600
70
1597
72 1381850
73 820440
75 1080401
2289208
2289209
2289221
86 1260250
87 1260430
88 1780690
89 1140450
77
Qty.
Hollow shaft Ø1
m³ 1
Hollow shaft Ø1
ln« 1
Hollow shaft Ø1
u1
Hollow shaft Ø1
x1
Gas engine flange F24
1
Washer
8
Set screw M6x6
1
Back-up ring
3
Complete pump head
ml 1
Complete pump head
n1
Complete pump head ³«ux 1
Oil sight glass
1
Snap ring
1
Contrast disc
1
O-Ring Ø20.24x2.62
1
AR64516
Oil
Oil Capacity - 15 oz
1
Legend
Ø 18
For m
Ø
18
Ø
18
Ø
18
RKV3.5G25
RKV3.5G30
For l
For u
For x
RKV4G30A RKA4.5G32 RKV5.5G40H
RKV4G30
RKV4.5G40H
RKV4G36
RKV4G37
For n
RKV4G32
For ³
For «
RKV3.5G35H RKV4G35H
RKV3.5G40H RKV4G40H
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First Choice When Quality Matters
RK Series Pumps
Operating Instructions and Parts Manual
Plunger Pumps
Instructions for Adjusting Gymatic Unloader Valves
Please follow these easy steps to adjust the
pressure:
Step 1:
Remove black cap (pos. #1) from knob.
Step 2:
Loosen bolt (pos. #2) with 6mm hex
wrench.
Step 3:
Loosen nut (pos. #3) to top of (pos. #2)
bolt.
Step 4:
Turn the black knob (pos. #4) clockwise
until it stops.
Step 5:
Start machine hold trigger on open
position and turn (pos. #2) bolt
until no further increase of pressure is
noticed, continue to hold trigger open and turn counterclockwise until a slight drop in
pressure is felt.
Step 6:
Spin (pos. #3) nut down. While holder
(pos. #2) bolt
in place with hex wrench, use special
tool (AR1560590)
Or extended 13mm socket wrench to
hand tighten
(pos. #3) nut against (pos. #4) black
knob.
Step 7:
Replace (pos. #1) black cap.
NOTE:
Now pressure can be decreased by
turning black knob (pos. #4) counterclockwise,
but the pressure cannot be increased to a rating
higher than what max is set at by technician.
1
2
3
4
Mounting Bolt Torque Specifications
Inlet 354 in/lbs30 ft/lbs
Discharge
221 in/lbs19 ft/lbs
AR1560590
Nut holder for adjusting Gymatic Unloader
NORTH
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First Choice When Quality Matters
RK Series Pumps
Operating Instructions and Parts Manual
Plunger Pumps
Torque Specifications
RK
Oil
Capacity
Manifold
(Head)
in/lbs:(ft/lbs)
Piston
Rear
Nut
Cover
15
217/(18)
106/(8.8)
89/(7.5)
Side
Cover
Valve
Cap
Connecting
Rods
217/(18)
478/(40)
N/A
Limited Warranty
Annovi Reverberi (A.R.) Cam Shaft Plunger Pumps are warranted for a period of
five years and Axial Radial Pumps are warranted for a period of one year to the
original purchaser. Electric Pressure Washers are warranted for a period of one
year to the original purchaser. This is from the date shipped from factory or U.S.
Warehouse. AR, ArrowLine and GF accessories are warranted for a period of
90 days.
Warranty covers manufacturing defects or workmanship; that may develop
under normal use and service in a manner up to the directions and usage
recommended by the manufacturer.
Warranty does not apply to misuse or when pump or accessory is altered or used
in excess of recommended speeds, pressures, temperatures or handling fluids
not suitable for pump or accessory material construction. Warranty does not
apply to normal wear (such as but not limited to: seals/packings, valves, plungers
and sealing o-rings), freight damage, freezing damage or damage caused by
parts or accessories not supplied by AR North America, Inc.
Liability of manufacturer for warranty is limited to repair or replacement of parts
only at the option of the manufacturer when such products are found to be of
original defect or workmanship at the time it was shipped from factory. This
warranty is in lieu of all other warranties, expressed or implied, including any
warranty of merchantability and of any and all other obligations or liabilities on
the part of the manufacturers or equipment.
Warranty Returns
Items returned for warranty consideration must have a Returned
Merchandise Authorization (RMA) number. All unauthorized returns
will be refused and shipped back to sender. Please fax requests to:
763-398-2009 or e-mail to [email protected].
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First Choice When Quality Matters