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5. Remove the input coupling (2 set screws). Slide the
input seal carrier off of the input shaft.
6. Press the input seal out of the seal carrier. Clean the
seal carrier and press the new input seal into the
carrier with a driver slightly larger that the OD of the
seal itself. Press the seal flat, flush with the outside of
the seal carrier. The seal is oriented so that the garter
spring is toward the inside of the gearcase. Insure that
the O-ring around the OD of the seal carrier has not
been damaged; replace if required.
7. Clean the input bore of the gearcase and the seal
surface of the input worm shaft. Never use sandpaper
or other abrasive to clean the seal surface! Inspect for
worn bearings and damaged seal surface.
8. If the worm shaft was removed, carefully insert and
bottom the worm shaft into the gearcase. Lubricate the
O-ring on the OD of the seal carrier, as well as the lip of
the new seal and seal surface of the input worm shaft
with reducer lubricant.
9. Carefully slide the input seal carrier into the bore of
the gearcase, making sure that the lip of the input seal
slides over the seal surface. If the seal folds or shows
evidence of tiny slivers of black material, the seal may
be damaged and will not seal properly. Remove the
seal carrier and replace the seal. Do not nick the seal
lip on the shaft keyway.
10. Slide the seal carrier as far as possible into the
bore of the gearcase. Use a hollow tool to press evenly
on the seal carrier (not on the seal!) and drive the
carrier into the case. The carrier must bottom against
the input bearing.
11. Install the retaining ring in the groove in the
gearcase bearing bore. Reinstall the reducer side
coupling half and position it where it was originally.
12. Reinstall the motor adapter and motor.
13. Add oil to recommended level for assembly
position.
OUTPUT SEAL REPLACEMENT – ALL
Never remove a seal by driving a screwdriver between
the seal lip and the shaft seal surface. The condition of
the shaft seal surface is critical to satisfactory lubricant
sealing.
The best way to replace an output seal is to remove the
output bearing housing, remove the bearing cup and
shims (you MUST reinstall the shims), remove the
seal, reinstall the bearing and shims and remount the
bearing housing and press a new seal into place. Use a
hollow driver with an OD slightly larger than the OD of
the seal to press evenly on the metal seal housing, not
contacting the seal lip area. The seal should be seated
flush with the outer surface of the bearing housing with
a smooth driver that contacts the seal near the OD. Do
not scratch shaft seal surfaces or deform the seal on
installation.
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