Jacobsen AR3, Technical/Repair Manual

Page: 237 / 342

6-46 4181384 First Edition
HYDRAULICS
6
Assembly Notes
NOTICE
• Assemble the tandem pump by reversing the order of
disassembly.
• Use a new seal kit during assembly. Apply a coat of
clean hydraulic oil to all parts to ease assembly.
• Rotate drive shaft after assembling each section to
make sure there is no binding between parts; do not
force.
• Use extreme care when installing shaft seal. Seal
must seat squarely in seal bore. Use caution not to
damage seal when installing cover over pump shaft.
• Install retaining bolts finger-tight and rotate drive
shaft to make sure it turns freely. Tighten bolts evenly
in steps to a final torque of 32—36 lb-ft (43—49 N·m)
and check rotation of pump drive shaft.
• Lubricate pump through ports with clean hydraulic oil
prior to installation.
Cutting Unit Motor
Removal, Disassembly, Inspection, and
Assembly
NOTE
See Chapter 8—Cutting Units for cutting unit motor
service information:
• AR-3: See “Deck Drive Motor” on page 8-25.
• TR-3: See “Reel Drive Motor” on page 8-33.
Lift Valve
Removal and Installation
See Figures 6-40 and 6-41.
1. Park the mower safely. (See “Park Mower Safely” on
page 1-7.)
Figure 6-40
NOTE
Label all connectors before disconnecting to ensure
correct installation.
2. Mark and disconnect solenoid connectors (1, 2, 5,
and 6) from solenoids.
NOTES
• Label all hydraulic hoses before disconnecting to
ensure correct installation.
• Close all openings with caps or plugs to prevent
contamination.
3. Disconnect hydraulic hoses (3, 4, 7, and 8) from
fittings.
It is important that all components 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 4134713)
TN1120
1
3
2
4
5
6
7
8