POWER TRAIN GRT9165 SERVICE MANUAL
7-22
Published 10-01-2020 Control # 699-00
Water Pump
The pump should be checked carefully for leaks and proper
lubrication. Replace or rebuild if leaking, cracked, or worn.
Fans and Belts
The fan should be checked for cracked or broken blades.
Refer to Engine Drive Belts, page 7-4.
Thermostat
The thermostat is nonadjustable and is incorporated in the
cooling system for the purpose of retarding or restricting the
circulation of coolant during engine warm up. Engine
overheating and loss of coolant is sometimes due to an
inoperative thermostat. To check for this condition, remove
the thermostat and test by submerging it in hot water and
noting the temperature at which the thermostat opens and
closes. Use an accurate high temperature thermometer for
making this test.
Hoses and Clamps
Hoses and their connections must be checked regularly
because they are often the source of hidden trouble. Hoses
may often times appear in good condition on the outside
while the inside will be partially deteriorated. If there are any
doubts about a hose doing its job, replacement should be
made. The clamps should be inspected to make sure they
are strong enough to hold a tight connection.
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