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 TROUBLE-SHOOTING GUIDE
CAUSE
INDICATED BY
REMEDY
COOLANT TEMPERATURE
TOO HIGH
1. Defective temperature gauge
a) Check gauge grounding
b) Check if sender lead is
shorted to ground
c) Replace defective gauge
2. Defective thermostat
-
Replace thermostat
3. Defective water pump
-
Replace water pump
4. Restricted or damaged water
-
Inspect rad hoses, changing if
line
necessary
5. Restricted air flow through
-
a) Remove restrictions
radiator
b) Steam clean radiator
c) Inspect and adjust fan
belts
6. Insufficient coolant
-
Add coolant
COOLANT IN LUBRICATION
OIL:
1. Defective oil cooler
-
Replace oil cooler core
2. Failure of cylinder head gasket
-
Install new gasket
3. Cracked or defective cylinder
-
Install new parts as necessary
head or block
OIL IN COOLING SYSTEM:
1. Defective oil cooler
-
Replace oil cooler core
2. Failure of cylinder head
-
Install new gasket
gasket
LOSS OF POWER:
1. Air system
-
Check for air intake restriction
2. Fuel system
a) Air in fuel system
Locate and correct leak.
Bleed fuel system
b) Dirty fuel filter
Change fuel filter
c) Restricted or broken fuel
Blow out all fuel lines with
lines
compressed air.
Bleed fuel system
d) Water in fuel
Drain, clean and refill fuel
tank
e) Cannot reach governed
Check and adjust throttle
RPM
linkage
3. Excess engine lubrication
High reading on dipstick
Remove extra oil
oil
4. Insufficient transmission
Low reading on dipstick
Fill transmission to proper
fluid
level
Rev.760501
400-5.3
K300
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