JLG 340AJ Service Manual - Manual (Page 164)

SECTION 5 - HYDRAULICS
5-6 – JLG Lift – 3121259
Disassembly Procedure
1. Remove the oil from the cylinder.
2. Fix the cylinder in a vertical or horizontal position. Verti-
cal position is convenient for disassembly and assembly.
Fix the base by inserting the pin not to be rotated.
Remove any hoses, valves, or fittings that may be in the
way.
3. Unscrew the cylinder Head
Glands that are threaded into the barrel are locked in
place with caulking. Using a spanner wrench, unscrew
the gland from the barrel. (It is easier to do this with rod
pulled out 5cm from the gland). If there is no caulking,
continue with the disassembly process.
4. Remove the Rod assembly
a. Check if the cap or plug has been removed from the
cylinder ports.
b. Place a suitable container under the cylinder to
catch any oil coming out of the cylinder.
Table 5-3. Special Tools
Name of Tool Description
Bushing for Disassembly
Bushing for Press
MRP Bearing Disassembly
MRP Bearing Press
Dust Wiper Press/
Dust Wiper Insert
Gland Seal Protection
(Gland Guide Jig)
Piston Seal Protection
(Piston Guide Jig)