Weichai America Corp.
Revision: October 2018 23
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.
12. Check 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.
13. 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.
14. Inspect Turbocharger
A. Remove coupling from turbocharger compressor inlet housing to gain access to the
compressor wheel shaft.
B. Look for oil contamination.
C. Look for compressor wheel damage to blades.
D. Wiggle the shaft radially and axially to determine if there is excessive play in the turbo
bearings.
E. If there is excessive play in the bearings or wear or damage, replace turbo.
Illustration 11: Axial play
Illustration 12: Radial play
Document Courtesy of Fly Parts Guy Co.
www.FlyPartsGuy.com
Document Courtesy of Fly Parts Guy Co.
www.FlyPartsGuy.com
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