Download Arrow VM1012-B Specifications

ENGINE
NS/GS
9 - 37
GENERAL INFORMATION (Continued)
Type . . . . . . . . . . . . . . . . . . . . . . . . 425CLIEE (36B)
Injection Pump . . . . . . . . . . . . . . . . . . Rotary Pump
Electronically Controlled.
Lubrication . . . . . . . . . . . . . Pressure Lubrication by
Rotary Pump, Full-Flow Filtration.
Engine Rotation . . . . . . . . . . . . . . Clockwise Viewed
From Front Cover.
ENGINE IDENTIFICATION
The engine model code (3-digit number/letter code)
and serial number are stamped on the forward facing
side of the engine block (Fig. 1).
DESCRIPTION AND OPERATION
Fig. 1 Engine Code Location
LUBRICATION SYSTEM
The pressurized system (Fig. 2) uses a rotary pump
(3) located in the front of the engine block, driven by
a gear which meshes directly with the crankshaft
gear. All the oil sent to every lubricated part is filtered. The pump sends the oil through a pressure
relief valve (2) to the filter (7) and through galleries
in the crankcase to the crankshaft bearings (8), camshaft bearings (11) and turbocharger (10). The piston
pins, connecting rod small ends and insides of the
pistons are lubricated and cooled by oil sprayed out
from jets (9) in the crankshaft mounting blocks. The
lubricating oil is sent to the rockers (12) through an
external pipe (Fig. 3). A valve in the filter cartridge
enables the oil to be circulated even when the cartridge is clogged.
Sump inlet (1). Pressure relief valve (2). Oil pump
(3). Oil cooler (6). Filter cartridge (7). Crankshaft
bearings (8). Jet valve (9). Turbocharger bearings
(10). Camshaft bearings (11). Rockers (12).
Fig. 3 Lubrication Lines
Fig. 2 Lubrication System