MBW AT84 - Manual (Page 11)

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4. To remove coupler gear (# 15) from exciter shaft will
require 07353 clutch removal tool. Turn coupler gear
clockwise (left hand threads) to remove.
Installing Drive Coupler
Refer to Main Assembly, page 14.
1. Install new coupler gear (# 15) into shaft. Make sure
coupler bottoms out. Use high strength threadlocker.
2. Slide new coupler gear on to motor splines and
tighten clamping screw. Use a medium strength
thread locker on the screw.
3. Install motor (# 6), align with coupler and secure with
mounting screw (# 23) and lock washer (# 24). Use
a medium strength thread locker. Make sure motor
mount surface bottoms out in frame.
4. Connect hoses.
Removing Exciter Bearings and Shaft.
Whenever a complete disassembly is done all bearings,
gaskets, O-rings and seals should be replaced.
Refer to Drum Assembly, page 12.
1. Drain exciter oil (Refer to Changing Exciter Oil, page
5.)
2. Remove drum assembly from frame and spider from
drum (Refer to Replacing Shockmounts, page 7.
Steps 1-4).
3. Remove input seal (# 10) from housing (# 14) using a
seal puller.
4. Remove snap ring (# 9) from exciter shaft through
seal bore.
5. Remove six bolts (# 19), securing housing (#14), to
the drum.
6. Remove two push off bolts (# 19)
7. Thread two 3/8-16x1 ½ bolts into these push off holes
evenly and push cover (# 14) off of drum. (If bolts are
not threaded in evenly the cover will bind) Remove
cover.
8. Slide exciter shaft (#13) out of drum.
9. Repeat steps 5-7 to remove cover (# 5) from the other
side.
10. Remove breather cover (# 11) by removing four
screws (# 17).
11. Remove bearings (# 8) from covers (# 5 & 14).
(Bearings must be replaced if removed from covers)
Installing Exciter Bearings and Shaft.
Refer to Drum Assembly, page 12.
1. Install new bearings (# 8) into housings (# 5 & 14).
Use oil on the OD of the bearing and press on the
outer race of the bearing. Failure to do so will result
in damage to the bearings.
2. Install new O-rings (# 7) onto housing (# 5 & 14),
lightly grease O-ring and housing surface which
slides into the drum.
3. Install exciter shaft (# 13) into drum. Leave seal side
of exciter assembly stick out of the drum about 12".
4. Take the seal side housing assembly (# 14), lightly oil
the exciter shaft bearing journal and apply Loctite 515
gasket eliminator, or equilivant, to mating flange.
Slide housing assembly onto shaft and install snap
ring (# 9) through seal bore onto shaft. Do not install
seal at this time.
5. Slide exciter shaft and housing assembly into drum.
Use care to press housing in evenly. Secure with six
bolts (# 19). Use medium strength thread locker.
Install two bolts (# 18) in the push out holes to protect
the threads.
6. To aid in assembly, insert a piece of ¾" round stock in
the vent end of the exciter shaft. Take vent side
housing assembly (# 5), apply a light coat of oil to the
exciter shaft bearing journal, and Loctite 515 gasket
eliminator, or equilivant, to the mating flange. Slide
housing assembly over the ¾" round stock, exciter
shaft, and onto drum assembly. Have someone lift up
the exciter shaft while aligning the housing assembly
with mounting holes in the drum and slide the
assembly on evenly.
7. Install the six bolts (# 19) use medium strength thread
locker. Install two bolts (# 18) in the push out holes to
protect threads. Make sure exciter assembly rotates
freely.
8. Remove ¾" round stock and install vent cover (# 11).
Make sure felt filter (# 1), retainer (# 2) and spiral pin
(# 15) are in place.
9. Press seal into housing (# 14) using care to keep seal
square with bore.
10. Fill exciter housing with exciter oil. Refer to Changing
Exciter Oil, page 5. or proper procedure and amount.
11. Install drive gear coupler (# 16, page 14) if removed.
12. Install spiders and frame.