- 15 -
19. Install the input shaft subassembly into the base plate
with the keyed end toward the left side (pulley side) of
the base plate.
20. Install the pulley side shaft cover (#19), containing
the shaft seal (#5) over the input shaft on the pulley
side of the base plate.
See the figure #3 for
LOCTITE #515 gasket maker application.
Lubricate the input shaft seal and bearing with
exciter oil before inserting the input shaft through
the oil seal in the cover to prevent tearing the
seal.
21. Secure the input shaft cover with the four flange head
crews (#44) using LOCTITE #243 thread locker
sealant on the bolt threads and torque the capscrews
to 13 ft.-lbs.
22. Install the other input shaft cover (#19) and secure
with the four flange head screws (#44) using
LOCTITE #243 thread locker sealant and torque the
screws to 13 ft.-lbs.
See the figure #3 for LOCTITE
#515 gasket maker application. Check input shaft
for minimum of .020” end play after covers are
installed and the bolts are torqued.
23. Install one exciter weight (#25) to the input shaft on
the hydraulic housing side of the base plate with two
socket head cap screws (#45) using LOCTITE #243
thread locker sealant and torque the cap screws to 32
ft.-lbs.
Be careful to use a small amount of thread
locker to avoid dripping it into the helix pin carrier
bearings at installation.
24. Slide the input gear (#20) toward the pulley side of
the input shaft (#22). The gears should not be
meshing at this time.
25. Install the ball bearings (#7) and the spacer washer
(#11) onto the shift shaft (#30) and secure with the
e-clip (#9).
26. Press the shift shaft and ball bearing assembly into
the helix pin carrier (#23) and secure with the internal
retaining ring (#8).
27. Lubricate the helix pin carrier/shift shaft assembly
with exciter oil and slide into the input shaft and install
the dowel pin (#6).
Note: Helix pin carrier MUST slide freely in input shaft.
28. Slide the helix pin/carrier to the middle of the helix
and orient the dowel pin parallel with the bottom of
the base plate housing (#15).
29. Align the timing marks on both gears and slide the
input gear over the helix pin/carrier and into mesh
with the gear on the idler shaft.
See the figure #5 for
setting the gear timing.
30. Install the other exciter weight (#25) to the input shaft
(#22) with two socket head cap screws (#45) using
LOCTITE #243 thread locker sealant on the threads
and torque the cap screws to 32 ft.-lbs.
Be careful to
use a small amount of thread locker to avoid
dripping it into the helix pin carrier bearings at
installation.
31. Check the gear timing to assure free motion of the
shift shaft/helix pin carrier within the helix of the input
shaft for the full range of motion from one end of the
helix to the other. Weights on both shafts to be down
when timed properly.
Note: The seals (#27), guide ring (#10), and gaskets (#32
and #34) should be replaced as a set. MBW
recommends purchasing rebuild kit #17347 for ease
of repairs (Seals are pre-assembled to the spool).
32. If rebuild kit #17347 was purchased, skip to step #34.
33. Assemble the new seals (#27) to the shift spool (#31).
Note the orientation of the seal lips. Hint: use
hydraulic oil to lubricate the seal inner diameter
BASEPLATE GEAR TIMING
TIMING MARK LOCATION
HUB OF IDLER GEAR
OPPOSITE SHAFT
SHOULDER
EXCITER WEIGHTS
ROTATED AS SHOWN
HELIX PIN ORIENTED
HORIZONTALLY
HYDRAULIC HOUSING
SIDE OF BASEPLATE
FIGURE 5
