KIT-MAINTENANCE 2405914 - Caterpillar

Illustration 1 g02214517
(1) Gauge adapter (P/N:30691-21100) (2) Compression gauge (P/N:33391-02100)
Remove the glow plugs from all cylinders.
Attach the compression gauge adapter to the cylinder, and connect compression gauge.
Crank the engine with the starter, then read the compression gauge indication while the engine is running at the specified speed.
If the compression pressure is lower than the limit, overhaul the engine.
Table 1
Item     Standard     Limit    
Compression pressure    
2.94 MPa (427.00 psi)    
2.550 MPa (370.000 psi)    Note: Measure the compression pressure with the engine running at 150 to 200 rpm. Measure the compression pressure with the oil and coolant temperature at 20 to 30 °C (68 to 86 °F).