MVT26
October 2003 Section 3 Page 17
3.1.2 Lubrication System
3.1.2.1 Description.
The compressor is provided with forced-feed lubrication. The oil pressure is produced by a low revving
gear pump. The oil pressure is between 44 psi and 87 psi (3 to 6 bar).
(See Figure 3.1-3). The oil pump (1) is coupled to and driven by the crankshaft. It pumps oil from the
crankcase through an oil filter (2) and the oil pressure regulating valve (3) to the 4th stage cylinder. The
oil is then distributed by the guide piston of the 4th stage and lubricates all the moving parts of the com-
pressor block. The oil pressure sensor (5) allows mounting for an optional oil pressure gauge or electronic
pressure monitoring.
CAUTION
This oil pump must be operated in the correct direction of rotation, other wise no oil pressure will
be built up and the compressor may be damaged.
Figure 3.1-3 Lubrication Oil System
1. Oil Pump
2. Oil Filter
3. Oil Pressure Regulating Valve
4. Injection Line to 4th Stage
5. Oil Pressure Sensor
1
2
3
4
5
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