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Section E
88 - 2
Dismantling and Assembly
- Power Sideshift Ram
The numerical sequence shown on the illustration is
intended as a guide to dismantling.
For assembly the sequence should be reversed.
Dismantling
1
Fix the ram assembly on a locally manufactured
strip/rebuild bench as shown at A.
2
Remove both end caps 1, (46mm AF). Pull the piston
rod assembly from the cylinder.
Note 1: DO NOT allow the piston rod to come into contact
with the cylinder bore. The cylinder bore may be damaged
by careless dismantling.
3
Position the piston rod assembly on a bench in place of
the ram cylinder. Remove the wear rings 2 and seal 3
from the piston head.
Note 2: The piston head cannot be removed from the rod. If
there is damage to the rod or piston head, replace the
complete assembly.
Carefully inspect the bore of the cylinder and the piston
4
rod outer diameter for scoring, nicks and burrs. If such
damage is visible the components must be renewed.
Note 3: If burrs are evident on the ends of the piston rod at
positions C or D remove by careful filing.
5
Remove the end cap seal 4, wiper seal 5 and 'O' ring 6,
both end caps are the same
6
Remove spacers 7 and 'O' rings 8.
9803/3280
Hydraulics
Hydraulic Rams
Purchased from www.WorkshopManuals.co.uk
Assembly
Clean the threads of the end caps and cylinder using a
1
wire brush.
Use JCB Cleaner/Degreaser to ensure that all threads
2
are free from grease, hydraulic oil and sealant. Allow 15
minutes for solvent to dry before applying JCB
Threadlocker and Sealer (High Strength).
Ensure that lubricants used during assembly do not
come into contact with the JCB Threadlocker and
Sealer (High Strength).
3
Refer to JCB Ram Sealing Procedure for the correct
method of fitting seals to the end cap and piston head.
4
Clamp the cylinder vertically and lower the piston rod
assembly in from the top, as shown at B. Take care not
to allow the piston rod to come into contact with the
cylinder bore. Be sure to engage the piston head new
wear rings and seal carefully into the cylinder. If the
piston head wear rings or seal are damaged during this
stage, they must be renewed.
5
Fit new 'O' rings 8 to spacers 7, slide onto the piston
head and rod assembly.
6
Apply JCB Activator to threads of the end caps and
cylinder. Allow Activator to dry for 15 minutes before
bringing into contact with the JCB Threadlocker and
Sealer (High Strength).
Note 4: Neither the JCB Threadlocker and Sealer (High
Strength) nor Activator must be allowed to contact seals,
bearing rings or 'O' rings.
7
Apply JCB Threadlocker and Sealer (High Strength) to
threads of the ends caps, fit new 'O' rings 6.
8
Ensure that there are no burrs at the ends of the piston
rod, see Dismantling - Note 3:
9
Fit an end cap over the piston rod. Apply light hand
pressure to the cap to engage the gland seal on the
piston rod. DO NOT use excessive force. Screw on the
first end cap and then fix the assembly on the
strip/rebuild bench as shown at A. Fit the remaining
cap and then torque tighten both caps.
Note 5: If hydraulic oil contacts the uncured JCB
Threadlocker and Sealer (High Strength) a weakening of the
bond will result. Cure times vary according to the ambient
temperature. Allow a minimum of 2 hours between
assembly and filling the ram with oil.
Torque Settings
Item
Nm
kgf m
lbf ft
1
400
40.8
295
Section E
88 - 2
Issue 1
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