5-60 4203780 First Edition
HYDROSTATIC POWER TRAIN
5
Inspection Notes
• Keeping parts in assembly order, clean and air dry
each item for inspection.
• Inspect for worn or defective parts.
NOTE
Do not lap the piston shoes, piston block, or backplate
surfaces.
• Inspect pistons and shoes. The pistons should be
snug, and the shoes should be flat and display no
signs of flaking.
• Inspect piston block. Make sure the flat surface is
free of score marks.
• Inspect the flat surface of the backplate. It should be
free of score marks and metal build-up.
• 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.
• Press shaft seal (2) into the housing until the seal is
approximately 7/32 inch (5.5 mm) below the surface
of the housing.
• Install cam plate insert (9), making sure the lettering
is facing toward the housing (8).
• Tighten backplate assembly screws (13) 15—18 lb-ft
(20—24 N·m).
• Pressure filter traction system upon start-up if metal
debris is found in system oil or motor. (See “Portable
In-Line Filter” on page 5-4.)
Front (Drive) Axle Assembly
Removal and Installation
See Figures 5-57 through 5-67.
1. Park the mower safely. (See “Park Mower Safely” on
page 1-6.)
2. Remove the front mower deck. (See “Front Deck” on
page 8-19.)
3. Remove floorboard. (See “Floorboard” on
page 9-16.)
Figure 5-57
NOTE
Label all connectors before disconnecting to ensure
correct installation.
4. Disconnect wire harness connector (2) from the front
mower deck valve solenoid (1).
• 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 PN 557432)
TN2045
2
1
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