HYDRAULICS
673831-Rev A 6-61
6
Disassembly Notes
• Drain oil from lift cylinder.
• Remove fittings from lift cylinder.
• Remove gland from the barrel.
• Remove nut.
• Remove piston and gland from the rod.
• Remove O-rings, backup rings, seals, and rod wiper
from piston and gland.
• Clean all parts using clean solvent, and dry using
compressed air.
• Inspect all parts for excessive wear, cracks, broken
parts, and scoring of the cylinder barrel, piston, and
rod.
• Replace parts as needed.
Assembly Notes
• Use a new seal kit during assembly.
• Lubricate O-ring, piston seal, gland seal, and wiper
with clean hydraulic oil before assembly.
• Assemble the lift cylinder by reversing the order of
disassembly.
• Apply Loctite 271 (or equivalent) on rod threads.
Tighten piston to 95 lb-ft (129 N·m).
Hydraulic Oil Cooler
Removal and Installation
The hydraulic oil cooler is part of the radiator. Removal
and installation of the radiator/hydraulic oil cooler is
described in Chapter 3—Engine. (See
“Radiator/Hydraulic Oil Cooler Assembly” on page 3-8.)
• During repair of the cylinder, use extreme
care not to damage the barrel, piston, rod,
and sealing surfaces of the cylinder.
• It is important that all component 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 component 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 4280312)
Loctite 271 (Red) Threadlocker
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