Weichai America Corp.
Revision: August 2019 24
9. Replace Engine Breather Filter
A. Unscrew breather housing top counter-clockwise.
B. Pull top of filter element up and remove filter.
C. Install new filter element and breather housing top.
10. Inspect Belts, Pipes, Clamps and Hoses
A. Inspect hoses, pipes, clamps, for loose connections, aging, corrosion or leaks.
B. Check the belt for fraying or damage. Replace if necessary.
C. Look for fluid leaks under and around the engine.
11. Inspect Ignition System
A. Complete procedure #7 above, and also inspect coils for cracks, heat duress, and any
damage.
B. Ensure all connections are secure.
C. Ensure the high tension leads are routed around any heat sources, circuit boards or
sharp objects that might damage the leads or if COP assure tight mounting.
12. Check Coolant Conditioner
A. When coolant is at room temperature or below, remove a sample of coolant and
measure the levels of coolant additives with a test strip (applies to conventional
coolants only).
B. Replace coolant or additive package if necessary or every two years. Ensure 50/50
mixture
C. Remove thermostat &replace with new as needed or every two years during coolant
change & flush.
D. Run engine until thermostat opens, and allow engine to cool to inspect coolant level.
E. Reinstall radiator cap tightly.
13. Inspect Water Pump
A. Check the water pump and gasket for leak.
B. Inspect water pump weep holes for signs of leakage under pressure while pressure test
cooling system.
14. Test and/or Replace Batteries
A. Disconnect negative cables from batteries.
B. Disconnect positive cables from batteries.
C. Test each battery individually.
D. Remove old batteries (if necessary) and install new one (s).
E. Connect positive cables. Clean if required.
F. Connect negative cables. Clean if required.
G. Start engine and test alternator for proper operation.
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