Inspection Of Gear Case (For Leakage) - TOHATSU MFS 25D Service Manual

36) Inspection of Gear Case (for Leakage)

1. Drain the gear oil.
Remove the upper oil plug 1 and connect a commercially
2.
available leakage tester to the hole.
3. Apply the specified pressure to the gear case, and check if
the pressure is maintained for 10 seconds.
Do not apply pressure to the gear case over
the specified value.
Doing so can cause damage to the oil seal.
Specified Gear Case Maintained Pressure:
50 kPa (7 psi) [0.5 kgf/cm
• Rotating the shaft while maintaining the
pressure makes it easier to find leakage caused
by the wear of the oil seal lip.
• Depressurize the gear case and then cover the
oil plug area with a rag before disconnecting the
leakage tester from the gear case.
4. If the specified pressure cannot be maintained, check
the oil seals of the drive shaft and propeller shaft and the
O-rings of each area for damage.
4st 25/30 2022
CAUTION
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