MBW MM120 - Manual (Page 17)

- 14 -
4. Press both bearings (#1) onto shaft.
5. Install key (#24) into pinion shaft (#9).
6. Press gear (#13) onto shaft and install retaining ring
(#19).
7. Press both bearings (#5) onto shaft.
8. Install key (#18) into output shaft (#15).
9. Press gear (#12) onto shaft and install retaining ring
(#21).
10. Press both bearings (#17) onto shaft.
11. Support gear case (#7) with clutch housing facing
down, and press seal (#22) into gear case.
12. Install assembled input shaft (#11) into gear case and
install retaining ring (#3).
13. Place all three assembled gear shafts into housing
and push them together until the bearings line up with
the bores and they drop into place.
14. Install two dowel pins (#4) and a new gasket (#16).
15. Assemble cover (#8) and press down firmly until seat-
ed.
16. Bolt cover to housing using all 11 bolts (#27) and nuts
(#28).
17. Press seal (#23) into cover. NOTE: Do not cut seal on
keyway.
18. Assemble key and sprocket to output shaft.
19. Use pipe sealant and install check plug (#29) and
magnetic drain plug (#6).
20. Fill with 32 oz. of 90-wt., or heavier, gear oil and install
breather plug (#25). Chevron 680 (140-wt.) worm
gear oil is recommended.
Parts Replacement Cycles and Tolerances
Bearings
Replace anytime a bearing is rough, binding, discolored or removed from housing or
shaft.
Clutch Adjust clutch (see maintenance section of this manual) as needed.
Engine Components Refer to your engine manufacturer’s Owner’s Manual.
Hardware
Replace any worn or damaged hardware as needed. Replacement hardware should
be grade 5 and zinc plated unless otherwise specified.
Safety Decals Replace if they become damaged or illegible.
Seals & Gaskets Replace if a leak is detected and at every overhaul or teardown.
V-Belts Replace if cracked, torn, or stretched to the point the belt won’t tension properly.