8.
Use seal puller, curved dental picks or similar tools to hook into the center of each side of the oil
seal (item 15) and pull out the oil seal from the bearing housing. Be very careful not to
score the inner and outer diameters of the bearing housing and assembly. Even a small
scrape can prevent the new oil seal from sealing.
9.
Place the new oil seal over the bearing assembly shaft with the spring towards the bearing
housing.
10.
Use a pipe with similar dimensions as the oil seal to slowly press the oil seal over the bearing
assembly shaft and into the bearing housing, until the back of the seal is approximently 5/16”
below the edge of the bearing housing. Do not press the oil seal beyond this point.
1.
With the Control Head removed, remove the four bolts (item 8), O-ring (item 10) and front plate
(item 9), then drain the oil out of the bearing housing.
2.
If the oil is contaminated, flush the bearing housing and assembly by pouring mineral
spirits into the diaphragm hole and allowing it to drain out of the front of the bearing housing.
NOTE:
Be sure to collect the old oil and mineral spirits and dispose of them in accordance
with local regulations.
3.
Remove nylon plug (item 11) and O-ring (item 12).
4.
Remove snap ring (item 5) and bronze bushing (item 6) from the diaphragm hole of the
bearing housing.
5.
Unscrew the four bolts (item 14) attaching the bearing housing to the engine.
6.
Pull bearing housing off of engine shaft. If it does not move freely, GENTLY tap bearing
housing away from the engine with a rubber mallet. NEVER pry the engine and bearing
housing apart.
7.
If bearing housing still doesn’t slide off the engine shaft, use a steering wheel puller to
press the engine off the bearing housing.
REPLACEMENT OF OIL SEAL
See Figure 11.
11.
Place key into engine shaft keyway, with bevel side down and towards engine.
12.
Start bearing assembly keyway onto key. Use breakable loctite and tighten the four bolts
(item 14) so that the bearing assembly keyway slides completely over the key
.
13.
Replace snap ring and bronze bushing into bearing housing.
14.
Insert nylon plug and O-ring into bearing assembly.
15.
Replace O-ring, front plate and bolts onto bearing housing.
16.
Pour 6 ounces of SAE 30 nondetergent oil (Part number 112-000) into bearing housing via the
diaphragm hole.
17.
Spin bearing assembly by rapidly pulling the engine pull rope, ensure that there is no binding.
18.
Start engine at low RPM and slowly increase RPM to ensure proper bearing assembly movement.
19.
Install diaphragm and control head.
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