Operation8016−1/A1
Winterthur Gas & Diesel Ltd.
4/ 10
Key to Fig. 1
1 Oil pipe − TC outlet 17 Supply pipe − vibration damper
2 Oil pipe − TC inlet 18 Vibration damper − crankshaft
3 Main collector (dirty oil, piston 19 Axial damper
underside) 20 Main bearing
4 Main collector (leak oil − gland box) 21 Thrust bearing
5 Oil inlet pipe 22 Axial damper monitor
6 Oil pipe (bearing drive, supply 23 Adjustable orifice (MHI turbochargers)
unit, servo oil) 24 Adjustable built-in orifice
7 Oil pipe (main bearing) (ABB turbochargers)
8 Supply pipe (main bearing) 25 Supply pipe (piston cooling,
9 Supply pipe (thrust bearing) crosshead bearing)
10 Supply pipe (axial damper) 26 Bottom end bearing
11 Toggle lever
12 Bottom end bearing
13 Nozzle DO Dirty oil − piston underside
14 Crosshead pin LD Leakage oil outlet − gland box
15 Ball valve (oil samples OD Oil drain
piston underside) OI Inlet from main oil supply
16 Ball valve (piston underside) TCO Oil pipe − TC outlet
3. Servo Oil System
The servo oil system controls the exhaust valve movement. Oil from the lubricating oil
system is used in the servo oil system.
3.1 Servo Oil
Oil flows through the oil pipe (1, Fig. 3) (bearing drive) and the supply pipe (14) to the
servo oil pumps (17).
Note: Do not operate the engine if the oil does not flow to the servo oil pumps.
The servo oil pumps supply oil at sufficient pressure through the HP servo oil
pipes (11) to the servo oil rail. The necessary oil pressure is related to the engine
load.
The leakage oil pipe (12) is located at a connecting block near the servo oil pumps.
The flow sensors (20) (installed upstream of each servo oil pump) monitor the oil
supply to the servo oil pumps.
Note: If a servo oil pump becomes defective, an alarm is activated through the
alarm and monitoring system (see 5551−1 Servo Oil Pump ).
Servo oil flows from the servo oil rail to the Valve Control Units (VCU) and their
4/2-way control valves.
Lubricating Oil System
2015-03
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