Checking The Radiator - Yamaha YXR70FX Service Manual

RADIATOR AND COOLANT RESERVOIR

CHECKING THE RADIATOR

1. Check:
• radiator fins
Obstruction → Clean.
Apply compressed air to the rear of the radi-
ator.
Damage → Repair or replace.
TIP:
Straighten any flattened fins with a thin, flat-
head screwdriver.
2. Check:
• radiator hoses
Cracks/damage → Replace.
3. Measure:
• radiator cap opening pressure
Below the specified pressure → Replace
the radiator cap.
Radiator cap opening pressure
93.3 ~ 122.7 kPa
(0.933 ~ 1.227 kg/cm
13.27 ~ 17.45 psi)
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a. Install the radiator cap tester 1 and adapter
2 onto the radiator cap 3.
Radiator cap tester
90890-01325
Radiator pressure tester
YU-24460-01
Radiator cap tester adapter
90890-01352
Radiator pressure tester adapter
YU-33984
b. Apply the specified pressure for ten sec-
onds and make sure that there is no drop in
pressure.
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4. Check:
• radiator fan
Damage → Replace.
Malfunction → Check and repair.
Refer to "COOLING SYSTEM" in chapter 9.
5 - 3
COOL
2
,
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