Cushman 646442 Owner's Manual page 172

9
HAULER 4X4 DIESEL
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Problem
3. Engine power is insufficient
(Knocking, vibration, smoke)
4. Engine is overheated
Poor injection nozzle condition or carbon accumulated onto it

Improper valve clearance

Clogged radiator grille and core

Insufficient or leaking coolant (Loose hose connection)

Broken cooling fan

Defected temperature sensor

Improper mixing ratio of antifreeze

Defected radiator cap

Improper bleeding after coolant change

Faulty cooling fan motor or switch

Aged or faulty water pump

Air in coolant line

Thermostat malfunction

check item Maintenance code
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Q
Q
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