jcb JS200 Service Manual page 355

Section E
75 - 2
Disassembly JS200/JS240 (continued)
4 Remove the piston rod.
Make sure that the piping ports are opened.
Catch the oil coming out from the rod side (cylinder
head side) port.
With the piston rod extended fully, remove the cylinder
head carefully.
Lay down the piston rod and the cylinder head together
on wood blocks.
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Note: Once all the bolts are removed, do not lift the piston
rod, as the cylinder may fall suddenly when separating.
! WARNING !
You can be injured if you use faulty lifting equipment.
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Make sure that lifting equipment is in good condition.
Make sure that lifting tackle complies with all local
regulations and is suitable for the job. Make sure that
lifting equipment is strong enough for the job.
INT-1-3-7
! WARNING !
Raised equipment can fall and injure you. Do not walk or
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work under raised equipment unless safely supported.
13-1-1-6
When pulling out the piston rod from a horizontally
positioned ram, be careful to prevent the rod from falling
just after it leaves the cylinder. During removal of the
piston rod, support it horizontally on blocks.
5 Secure the piston rod.
*
Use the flat rod head or the rod end eye to prevent the
piston rod from rotating.
6 Remove the piston nut.
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Remove the set screw, noting the following:
After being installed, the set screw is crimped at two
places with a punch.
Remove the crimped portions with a drill A, then loosen
the set screw. Remove the steel ball B located below
the end of the set screw.
Remove the piston nut.
Note: The piston nut was torque tightened on assembly. A
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torque 1.5 times the tightening torque is necessary to loosen
the piston nut. Prepare a power wrench using a hydraulic
cylinder (see Ram Piston Head Nut - Removal and Fitting).
9803/6400
Hydraulics
Hydraulic Rams
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Section E
75 - 2
A
B
JS00120
Issue 2*