MBW 2900280 Manual Download

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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 (#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 (#17) to the input shaft

(#16) with two socket head cap screws (#24) 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 30. for steps

#32 thru #42.

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).

36. Lubricate the inside of the hydraulic housing (#16)

and the seal lips with hydraulic oil.

See Maintenance

section for hydraulic fluid type.

37. Install the hydraulic housing over the hydraulic seals

and guide ring.

Be careful not to damage the guide

ring and hydraulic seals during installation.

38. Secure the mount plate (#20) over the hydraulic

housing (#16) to the input shaft cover (#12) with the
four flanged cap screws (#22) using LOCTITE #243
thread locker sealant on the threads and torque the
cap screws evenly in stages to 13 ft.-lbs.

Make sure the bleeder screw port (#14) is in the

vertical position.

39. Install the gasket (#18) and cover (#19) to the

hydraulic housing (#16) with four hex head flange
screws (#21) using LOCTITE #243 thread locker
sealant on the threads and torque the cap screws to
76 in-lbs.

40. Install the 90 degree fitting (#13) into the port on the

hydraulic housing (#16).

41. Install the bleeder screw (#14) loosely into the port

fitting of the hydraulic housing.

42. Install the socket head pipe plug (#25) into the oil

drain port using LOCTITE #565 pipe sealant.

43. Pour in the exciter oil.

Use only MBW Ground

Pounder Exciter Oil. The amount of exciter oil
required is shown in the FLUID LEVELS section
of this manual.

44. Install the baseplate cover (#13) using LOCTITE #515

gasket maker on the lip of the mounting surface and
secure with twenty hex head flange screws (#22)
using LOCTITE #243 on the threads.

See the figure