Yamaha RMAX Type II G Unit Operation Manual page 62

Pre-Flight Preparation and Inspection
2 Water Pump
Inspect the mating surface of the housing cover,
rubber hoses, and rubber hose connections for
any coolant leakage.
During the initial stage of helicopter operation,
the water pump may leak a small amount of
coolant (10 to 20cc could leak from the drain
hole at the bottom of the water pump, onto the
absorbent pad provided on the frame). This nor-
mal condition occurs while the internal seal is
being broken in. It will eventually stop with con-
tinued operation of the helicopter.
3 Radiator
Inspect the radiator cap and the rubber hose
connections for any coolant leakage.
When necessary, remove the radiator cap
only after the engine has cooled down. If the
radiator cap is removed immediately after the
engine has been stopped, when the coolant
is extremely hot, the scalding liquid could
shoot out and cause burns.
4 Engine
Inspect the mating surface of the cylinder body
and the oil seal for any oil leakage, and the cylin-
der head for any coolant leakage.
5 Transmission and Intermediate Transmission
Inspect the mating surface of the transmission
case and the oil seal for any oil leakage.
A slight stain of coolant or oil does not indicate an
abnormal condition. However, if the coolant or oil is
leaking in a dripping manner, cancel the flight and
request a repair by your dealer.
G Coolant leakage will adversely affect the
cooling performance of the helicopter and
cause it to overheat.
G Oil leakage will reduce the internal lubrica-
tion of the transmission and damage the
gears and bearings.
4-21
WARNING
NOTICE
Water Pump
Cylinder Head
Transmission Case
Radiator Cap
Radiator
Hose
Intermediate Transmission