ARMY TM 9-6115-464-12
AIR FORCE TO 35C2-3-445-1
NAVY NAVFAC P-8-624-12
4-61 ENGINE TESTING.
a.
b.
c.
d.
e.
f.
g.
h.
i.
j.
k.
1.
4-82
Check that the generator set is properly grounded (para 2-4d.).
Connect a 15 KW load to the load terminal board (para 2-4e.).
Start the engine (para 2-6) and allow it to operate approximately 15 minutes at no load governed speed.
Refer to paragraph 2-2 and check that all engine instruments indicate normal operation.
Listen for abnormal sounds, such as “knocking”, while the engine is operating.
Observe the exhaust for excessive smoke.
Visually check for excessive vibration while the engine operates.
Refer to paragraph 2-6 and apply the load to the generator.
Repeat steps d. through g. above.
Stop the generator set (para 2-7).
If any abnormalities were noted during test operation, refer to Table 4-1 for reference to the applicable
maintenance paragraph.
Test cylinder compression pressure as follows:
(1)
(2)
(3)
(4)
(5)
(6)
(7)
Disconnect fuel pump solenoid (pump will be in off position and will not pump fuel).
Refer to paragraph 4-37 and remove fuel injection nozzle holders.
Use fully charged batteries and take readings at cranking speed (150 to 200 RPM).
Do not operate starter more than 15 seconds at a time to prevent overheating of starter. Allow one
(1) minute between cranking cycles to allow starter to cool.
Readings on the gage can be used as reference between cylinders. Maximum pressure difference
between cylinders is 20 percent. An extremely low reading in any one cylinder would indicate valve,
head gasket or piston ring blow-by.
Refer to paragraph 4-37 and install fuel injection nozzle holders.
Connect fuel pump solenoid.
