Section02ENGINE
Subsection 01 (LEAK TEST)
• If there is no leak at the tested location, con-
tinue pumping to maintain pressure and con-
tinue with next items until leak is found.
Tools
Check all tools used for the test:
– exhaust plates and the cap on the fitting
– plugs in intake rubber boots
– hose pincher on impulse hose
– rubber caps on inlet and outlet fittings of oil
injection system
– RAVE plates (if so installed)
– pump and hose.
Engine
Check the following:
– Spark plugs base and insulators.
– All jointed surfaces:
• cylinder head
• cylinder
• RAVE valve cover (if so installed)
• injectors area
• decompressor areas
• cylinder crankcase halves (joint)
• counter balancing shaft outer seals and their
filling tubes
• crankshaft seals (PTO and MAG sides)
• oil injection pump mounting flange (O-ring)
• coolant pump housing
• crankcase grease reservoir fitting.
– Small injection oil lines coming from pump.
A32C1GA
1
2
1
TYPICAL
1. Injection nipples
2. Small injection oil lines
Check for air bubbles or oil column going toward
pump. It indicates defective check valve in injec-
tion nipples.
Check pump shaft gear oil reservoir.
Pump Shaft Oil Gear Reservoir
Install air pump on adapter and pressurize as
above.
A32C1HA
If pressure drops, it indicates a defective crank-
shaft inner seal.
2
A32C1IA
1
TYPICAL — CRANKSHAFT INSTALLED IN UPPER
HALF CRANKCASE
1. Crankshaft inner seal on PTO side
2. Crankshaft inner seal on MAG side
– Check leak indicator hole below coolant pump
housing with soapy water.
12 mmr2005-113
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