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Shaft Seal Disassembly:
1. Follow steps 1 through 4 under "Grinder Disassembly".
2. Remove the impeller retaining bolt and retainer (Key
Nos. 31 and 30).
3. Using two pry bars between the impeller and the cutter
pry the cutter (Key No. 29) off of the shaft.
NOTICE: To apply even pressure and avoid bending the
shaft, locate pry bars on opposite sides of the shaft.
4. Using two 5/16-18 threaded holes provided in the
impeller, pull the impeller. Remove the impeller shims
from the shaft and save them.
5. Remove the seal spring and seal head (Key No. 22).
6. Remove the three cap screws that secure the back plate
(Key No. 25) to the seal plate (Key No. 20) and remove
the back plate. If the back plate does not lift off, tap
around it with a plastic or rawhide mallet to break it
loose.
7. If the outer seal is being replaced, pry the stationary
face out of the back plate.
NOTICE: If the outer seal has failed, replace the inner seal
also.
8. To remove the inner seal, remove the snap ring (Key No.
23) behind the seal washer and remove the washer,
spring, and seal head. Pry the stationary seal face out of
the seal plate.
Reassembly:
NOTICE: Use all new O-Rings and seals during
re-assembly.
1. Press a new ceramic seal head into place in the seal
plate. Be sure that you do not damage the seal face
when sliding it over the shaft shoulder.
All manuals and user guides at all-guides.com
2. Clean out the seal cavity in the back plate and press a
3. Replace the spring seal head on the shaft; the carbon
4. Replace the back plate on the seal plate with the ceramic
5. Replace the outer spring seal head. Make sure that the
6. Replace impeller shims, impeller and cutter; secure
NOTICE: The impeller must have .005" (0.13mm) to .010"
(0.36mm) clearance between the impeller vanes and the
volute inside the bottom surface of the volute. If necessary,
adjust the impeller shims to provide this clearance.
NOTICE: Use high-strength Loc-Tite to hold the impeller
retaining screw.
7. Install the volute; install the six cap screws and tighten.
8. Refill the seal plate with oil and replace the plug.
8
new ceramic seal head into place in the seal plate. Be
sure that you do not scratch or otherwise damage the
seal face.
face should be next to the ceramic face. Be sure you do
not damage the carbon face when putting the spring
seal head on the shaft.
seal facing out. Install the three cap screws and tighten.
carbon face meets the ceramic face; do not damage the
carbon face when installing it on the shaft.
assembly with retaining cap screw.
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