HYDROSTATIC POWER TRAIN
4181383 First Edition 5-37
5
NOTICE
Inspection Notes
• Keeping parts in assembly order, clean and air dry
each item for inspection.
• Inspect for worn or defective parts.
• Look for metal chips or slivers during cleaning (an
indication of damage to pump or other hydraulic
component).
• Inspect all parts for cracks, nicks, burrs, and
excessive wear. Inspect for scoring, galling, and
scratches on surfaces. Replace parts as necessary.
Assembly Notes
NOTICE
• Assemble the front wheel motor by reversing the
order of disassembly.
• Lubricate all O-rings prior to assembly.
• Time the motor correctly.
• Tighten retainer screws and valve housing screws in
correct sequence.
• Install check plugs (3) and tighten to 60—120 lb-in.
(7—14 N•m).
• Install plug (5) and tighten to 150 lb-in. (17 N•m).
• Pressure filter traction system upon startup if metal
debris is found in system oil or motor. (See “Portable
In-Line Filter” on page 5-2.)
Front Wheel Motor Timing
Figure 5-36: Correct Motor Timing
1. Locate the largest open pocket (4) in geroler (5).
Mark the location of the pocket on the outside edge
of geroler.
2. Align the case drain hole (7) and the pressure relief
hole (6) in the geroler with the case drain hole and
pressure relief hole in the bearing housing. Install the
geroler on the bearing housing. Retain the rollers in
the outer geroler ring if they are loose.
3. Install the valve drive (3) in geroler (5).
4. Lubricate the seal and install it in the valve plate (2).
5. Align the case drain hole (8) in the valve plate (2)
with the case drain hole (7) in the geroler (5). Install
the valve plate (2) with the seal side toward the
geroler.
6. Locate the slot in the valve plate (2) that is in line with
the largest open pocket (4) of geroler.
7. Locate any side valve opening (1) through to the face
of the valve. Line up the opening with the open slot of
the valve plate that is in line with the largest open
pocket (4) of geroler. Rotate valve (9) clockwise 1/2
spline tooth to engage with the valve drive spline.
It is important that motor parts are marked and
placed in assembly order to aid in assembly.
It is important that all motor parts are absolutely
clean, as contamination can result in serious
damage and/or improper operation.
Never use shop towels or rags to dry parts after
cleaning, as lint may clog passages. Dry parts
using compressed air.
It is important that all motor parts are absolutely
clean, as contamination can result in serious
damage and/or improper operation.
Never use shop towels or rags to dry parts after
cleaning, as lint may clog passages. Dry parts
using compressed air.
Required Materials
Seal Kit (Jacobsen P/N 557651)
Seal Kit (Jacobsen P/N 5002111)
TN1522
4
5
7
8
6
1
2
3
9
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