117
3. Start the engine and run at 3000 RPM. With the oil
temperature at 60° C (140° F), the oil pressure gauge
must read as specified.
NOTE: If the oil pressure is lower than specified,
check for low oil level, or defective oil pump.
NOTE: If the oil pressure is higher than specified,
check for too heavy engine oil weight (see General
Information), clogged oil passage, clogged oil filter,
or improper installation of the oil filter.
Liquid Cooling System
RADIATOR
Removing
1. Drain the coolant at the engine.
2. Remove the front body panel/rack.
3. Remove the upper and lower coolant hoses.
4. Remove the cap screws and nuts securing the radia-
tor to the frame.
5. Disconnect the fan wiring from the main wiring har-
ness; then remove the radiator/fan assembly and
account for the grommets and collars.
6. Remove the fan/fan shroud assembly from the radia-
tor.
Cleaning and Inspecting
1. Flush the radiator with water to remove any contaminants.
2. Inspect the radiator for leaks and damage.
3. Inspect all hoses for cracks and deterioration.
4. Inspect all fasteners and grommets for damage or wear.
Installing
1. Position the fan/fan shroud assembly on the radiator;
then secure with existing hardware.
2. Place the radiator with grommets and collars into
position on the frame; then install the cap screws and
nuts. Tighten to 12 ft-lb.
3. Install the upper and lower coolant hoses; then
secure with hose clamps.
AF734D
4. Install the front body panel/rack.
5. Fill the cooling system with the recommended
amount of antifreeze (see Periodic Maintenance).
Check for leakage.
6. Connect the fan wiring to the main wiring harness.
THERMOSTAT
Removing
1. Drain approximately one quart of coolant from the
cooling system.
2. Remove the two cap screws securing the thermostat
housing to the cylinder head. Account for an O-ring
and a thermostat.
Inspecting
1. Inspect the thermostat for corrosion or spring dam-
age.
2. Using the following procedure, inspect the thermo-
stat for proper operation.
A. Suspend the thermostat in a container filled with
water.
B. Heat the water and monitor the temperature
with a thermometer.
C. The thermostat should start to open at 71-86° C
(160-187° F).
D. If the thermostat does not open, it must be
replaced.
3. Inspect all coolant hoses, connections, and clamps
for deterioration, cracks, and wear.
NOTE: All coolant hoses and clamps should be
replaced every four years or 4000 miles.
Installing
1. Place the thermostat and O-ring into the thermostat
housing; then secure the thermostat housing to the
cylinder head with the two cap screws.
2. Fill the cooling system with the recommended
amount of antifreeze (see Periodic Maintenance).
Check for leakage.
500
0.6-0.7 kg/cm
2
(8.5-10 psi)
550/700
1.2-1.5 kg/cm
2
(17-21 psi)
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