4. Remove the piston retaining nut (1) and slide the piston (2) and head gland (4) off the
rod (5).
O-rings, back-up rings and seals may now be replaced.
ASSEMBLY
Reassemble the extend cylinder by reversing the disassembly procedure. Torque the piston
retaining nut to 100-150 ft. lbs.
As the cylinder components are reassembled, be certain all rings, seals, spacers and
setscrews required in one step are in place before proceeding to the next step. See Group
3 of the parts book for a complete listing of cylinder parts.
JACK CYLINDERS
The jack cylinders on this crane can be removed without removing the outrigger beams. To
remove the jack cylinders, extend the outrigger beam a few feet, disconnect the hydraulic
hoses and remove the four bolts retaining the jack cylinder to the outrigger beam.
DISASSEMBLY
Disassemble the jack cylinders by means of the following procedure:
1. Remove the jack cylinder from the outrigger beam.
T300-1_T500-1_T780
Service / Parts
444 P/N 12261-683
REVISED: January 2015
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