Yamaha RS90GTZ Service Manual page 31

COOLING SYSTEM
14.Inspect:
• Cooling system
Decrease of pressure (leaks) → Repair as
required.
Inspection steps:
• Attach the radiator pressure tester (radiator
cap tester) and radiator pressure tester
adapter (radiator cap tester adapter)
the coolant filler
Radiator pressure tester:
YU-24460-01
Radiator cap tester:
90890-01325
Radiator pressure tester adapter:
YU-33984
Radiator cap tester adapter:
90890-01352
• Apply 122.7 kPa (1.23 kgf/cm
• Measure the pressure with the gauge.
Air bleeding
1. Remove:
• Lower rear cover
2. Bleed air from the cooling system.
Air bleeding steps:
• Lift up the tail of the snowmobile.
• Remove the bleed bolt
exchanger.
• While slowly adding coolant to the coolant
filler, drain the coolant until no more air bub-
bles appear.
• Tighten the bleed bolt
Bleed bolt (heat exchanger):
13 Nm (1.3 m•kgf, 9.4 ft•lbf)
2-8
INSP
ADJ
.
2
, 17.8 psi).
on the rear heat
.
to