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Hydraulic Troubleshooting
M30 SERVICE INFORMATION
Hydraulic Pump Flow Rates, Common Abbreviations
Hydraulic Pump Flow Rates (typical)
PROPEL
PUMP
ACCESSORY PUMPS
ENGINE
14.5 to 15 GPM
(54.8 to 56.7 LPM)
maximum
Gas/LPG: 2700 RPM
Diesel: 2800 RPM
9.5 to 10 GPM
(35.9 to 37.8
LPM)
6 to 6.3 GPM
(22.7 to 23.8
LPM)
4 to 4.2 GPM
(15.1 to 15.9
LPM)
PUMP
1
PUMP
2
PUMP
3
Commonly Used Abbreviations
AUX
CIR
CK
CM
CONV
CU
CV
CYL
DC
DC
E
FLTR
GPM
HTX
IN
LH
LPM
LS
M
H
Auxiliary
Cubic Inch Dis placem ent per Revolution
Check Valve
Centim eters
Conveyor
Cubic
Control Valve
Cylinder
Dis connect Coupler (Hydraulic)
Direct Current (Electrical)
Engine (Com bus tion)
Filter
Gallons Per Minute
Heat Exchanger
Inches
Left Hand
Liters Per Minute
Load Sens e
Motor (Com bus tion)
MFLD
MTR
OR
PC
PMP
PR
PSI
PTO
PWM
RES
RH
RPM
RV
SC
STRN
SV
SW
TV
V
Manifold
Motor (Hydraulic)
Orifice
Pilot Port Check Valve
Pum p
Pres s ure Relief Valve
Pounds Per Square Inch
Power Take Off
Puls e Width Modulation
Res ervoir
Right Hand
Revolutions Per Minute
Relief Valve
Spring Loaded Check Valve
Strainer
Solenoid Valve
Switch
Throttle Valve
Volts
Typical Hydraulic Manifold Port Markings
C
G
LS
Hydraulic Cylinder Connection
Test Port
Load Sense Port
M
P
R or T
Hydraulic Motor Connection
Pump Connection
Return Port (To Tank)
M30 9003947 (6--08)
114
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