MBW GPR160 - Manual (Page 17)

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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.
22. Slide the input gear (#10) toward the pulley side of
the input shaft (#16). The gears should not be
meshing at this time.
23. Install one exciter weight (#21) to the input shaft on
the hydraulic housing side of the baseplate with two
socket head cap screws (#27) using LOCTITE #243
thread locker sealant and torque the cap screws to 30
ft.-lbs. Be careful to use a small amount of thread
locker to avoid dripping it into the helix pin carrier
bearings at installation.
Refer to Lower Shaft Assembly, page 24. for steps #24
thru #27. Use caution when installing bearings to
prevent damaging bearings.
24. Install the ball bearings (#3) and the spacer washer
(#7) and second bearing (#3) onto the shift shaft
(#10) and secure with the e-clip (#5).
25. Press the shift shaft and ball bearing assembly into
the helix pin carrier (#9) and secure with the internal
retaining ring (#8).
26. Lubricate the helix pin carrier/shift shaft assembly
with exciter oil and slide into the input shaft and install
the dowel pin (#11).
Note: Helix pin carrier MUST slide freely in input shaft.
27. Slide the helix pin/carrier to the middle of the helix
and orient the dowel pin parallel with the bottom of
the baseplate housing (page 22, #15).
28. 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. Note position of
exciter weights (both weights in the down position)
See the figure #5 for setting the gear timing.
29. Install the other exciter weight (#21) to the input shaft
(#16) with two socket head cap screws (#27) using
LOCTITE #243 thread locker sealant on the threads
and torque the cap screws to 30 ft.-lbs. Be careful
to use a small amount of thread locker to avoid
dripping it into the helix pin carrier bearings at
installation.
30. 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.
Refer to Lower Shaft Assembly, page 24. for steps #32
thru #41.
Note: The seals (#6), guide ring (#4), and gaskets (#17
and #18) should be replaced as a set. MBW
recommends purchasing rebuild kit #17368 for ease
of repairs (Seals are pre-assembled to the spool).
31. If rebuild kit #17368 was purchased, skip to step #34.
32. Assemble the new seals (#6) to the shift spool (#15).
Note the orientation of the seal lips. Hint: use
hydraulic oil to lubricate the seal inner diameter
before pressing onto the spool. Beware the slot
cut on the shift spool. It may be sharp. Press the
seal on “WITH” the slot and NOT “ACROSS” the
slot.
33. Thread the shift spool with seals onto the shift shaft
(#10). Note the left had thread.
34. Assemble the new guide ring (#4) to the shift spool.
35. Install a new mount gasket (#17) onto the hydraulic
housing (16).
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