Jacobsen AR3, Technical/Repair Manual

Page: 293 / 342

8-28 4181384 First Edition
CUTTING UNITS
8
7. Inspect all parts for wear or damage. Replace the
motor as a unit if any parts other than seals require
replacement.
Inspect for metal chips or slivers during cleaning (an
indication of damage to motor or other hydraulic
component.)
Assembly Notes
NOTICE
• Assemble the deck drive motor by reversing the order
of disassembly.
• Apply a coat of clean hydraulic oil to all parts to aid
assembly.
• Use extreme care when installing shaft seal, it must
seat squarely in seal bore. Use clean grease on shaft
and seal. Use caution when inserting shaft into seal
to avoid cutting or damage to seal during assembly.
• Install screws finger-tight and rotate drive shaft to
make sure it turns freely. Tighten screws evenly in
steps to a final torque of 37 lb-ft (50 N·m).
Cutter Blade
Removal and Installation
See Figure 8-8.
1. Park the mower safely. (See “Park Mower Safely” on
page 1-7.)
2. Raise and support the cutting units. (Refer to “Safety,
Operation, and Maintenance Manual.”)
3. Disconnect the negative (–) battery cables at the
battery.
Figure 8-8
!
CAUTION
NOTE
Blade screw is left-hand thread.
4. Remove blade screw (1), washer (2), blade (3), blade
adapter (4) and key (5) from hydraulic motor spindle
(not shown).
Installation Notes
• Install blade by reversing the order of removal.
• Tighten blade screw (1) to 70 lb-ft (95 N·m) torque.
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 4157422)
Blades are extremely sharp and can cause severe
injury.
TN1194
1
2
3
4
5