BRP Johnson 4HP, Service Manual, Page: 138 / 185

8-8
GEARCASE
SHIFT ROD AND SHIFT CAM
SHIFT ROD AND SHIFT CAM
•
Inspect the “stepped” surfaces of the shift cam. If exces-
sive wear, chipping or other damage is found, replace the
cam.
•
Inspect the shift rod guide. If excessive wear, pitting, corro-
sion or other damage is found, replace the guide.
•
Inspect the shift rod boot. If cracked, torn or other damage
is found, replace the boot.
WATER PUMP AND RELATED ITEMS
•
Inspect the impeller. If cut, tear or excessive wear is found,
replace the impeller.
•
Inspect the pump case and the under panel. If wear, crack-
ing, distortion or corrosion is found, replace.
DRIVESHAFT SUPPORT HOUSING
•
Inspect the housing. If cracking, corrosion or other damage
is found, replace the housing.
•
Visually check the oil seals. If cuts, nicks, excessive wear
or other damage is found, replace the oil seal.
•
Visually check the bushing. If excessive wear, pitting or
other damage is found, replace the housing.
Do not re-use the oil seal once removed. Always use a
new oil seal.
Replacing driveshaft support housing oil seal
1. Remove the oil seals using a screwdriver.
2. Apply DPL to outer circumference of the oil seal.
3. Drive the oil seals down into the housing with lipped por-
tion toward the water pump case. (one at a time)
4. Apply Triple-Guard grease to the seal lips.

Triple-Guard Grease
DRIVESHAFT
Inspect the driveshaft. If wear, twist or other damage is found
on the splines, replace the driveshaft.
Direction of water
pump case