OWI C-195-OWI, Руководство по обслуживанию

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Page 6
MODEL C-195-OWI
TORQUE CONVERTER
OVERHEATING OF TORQUE CONVERTER
The torque converter cooling package is designed to furnish sufficient cooling down to 30%
speed ratio. If the output shaft of the torque converter is turning at less than one-third (1/3) of
engine speed, overheating will occur and a more efficient drive ratio should be selected.
Overheating may also occur if the output shaft of the torque converter is turning at more than
80% of the engine speed.
Any oil leak in either the piping or the torque converter internal turbine assembly should be
repaired immediately. If the sump oil level is allowed to drop below the oil pump suction, the
torque converter will lose power and overheat. Bearings and seals may be severely damaged
before the power loss is noted.
LOW PRESSURE
Check gauge readings with a second gauge. The gauge may be installed by removing the one-
fourth-inch (1/4") pipe plug in the end of the control block (aluminum cap). The torque
converter must be shut down before removing any pipe plugs.
The oil flow may be checked with a pressure gauge. There are two one-fourth-inch (1/4") pipe
plugs on the face of the pressure control valve. Remove the plug on the left and connect the
pressure gauge. With the engine at full throttle, the converter hot (above 125
o
F), and no load on
the output shaft, if the pressure is 10 psi or over, the flow is sufficient and the trouble is in the
control valve. Check the strainer and orifice for clogging and the spool for sticking.
If the pressure at the left tap of the pressure control valve is low (5 psi or under) and the torque
converter pressure is low, the trouble is in the circulating pump. First, add extra oil (2" above
the fill mark with converter running). With low oil pressure, it is possible to have air in the
circuit and get a false reading on the dipstick. Excessive oil can also cause low pressure due to
excessive agitation and foaming from the chain.
An excessive leak inside the torque converter can cause sufficient foaming in the sump from the
spray to keep the pump air locked. This can be checked by removing the cover plate with the
engine at idle speed. THIS SHOULD BE DONE WITH CAUTION.