Engine System, Diesel 243Service Manual – CS7000
Compression Test
1. Begin with a fully charged battery.
2. Remove the air cleaner assembly. Cover the air inlet opening to prevent foreign objects from falling into
the engine.
3. Remove the glow plug electrical connector nuts and connector “rail”.
4. Insulate the electric terminal that feeds the rail to prevent it from shorting to ground.
5. Clean the area around the glow plugs to prevent any debris from falling into the engine cylinders when
they are removed. Remove the glow plugs.
6. To test the compression of one of the cylinders, screw in an appropriate adapter into the glow plug
threads in the cylinder head and attach a suitable compression gauge. Pictured are Snap-On Diesel
Compression gauge EEPD500 used with compression test adapter tting TU-15-35 and coupler M3569.
Remove nuts
Remove
connector
“rail”
Insulate
Terminal
Snap-On
TU-15-35
Snap-On
M3569
Snap-On
EEPD500
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