SYSTEMS AND SCHEDULED MAINTENANCE
26
Operator’s Manual Marine Diesel Gensets
Revision 2. 10/2017
MAINTENANCE TASK. COMPRESSION PRESSURE INSPECTION
Start by:
1. Make sure the genset oil level, air
cleaner, starting motor and battery
are well-conditioned.
2. Start the genset and allow it to warm
up thoroughly, until 50ºC or more
coolant temperature.
Measure the compression pressure on all
cylinders:
1. Remove the injection nozzle from the
cylinder head where the compression
pressure is to be measured.
2. Attach the compression pressure gauge.
3. Disconnect the stop solenoid connector (the fuel supply shut off) and crank the genset
by means of the starter, and read the compression pressure gauge indication when the
genset is running at specified speed.
4. If the compression pressure is lower than repair limit, check the genset parts affected.
-
It is not a good practice to measure the compression pressure on only few cylinders,
and presume the compression on the remaining cylinders.
-
Compression pressure varies with genset speed. Check genset speed when
measuring the compression pressure.
-
The compression pressure will be slightly higher in a new or overhauled genset due to
new piston rings, valve seats, etc.
Model
Compression pressure
85 GT/GTC - 100 GTA/GTAC - 115 GT/GTC
- 120 GTA/GTAC
3,0 a 3,8 MPa
(30,6 a 38,7 kgf/cm2)
Summary of Contents for 100 GTA
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