Hydraulic Cylinder/Body Disassembly - SPX TWLC Series Operating Manual

8. Rotate the yokes around the banjo until the
yoke keyways engage.
9. Clamp the advance and retract yokes together
by installing the yoke screw and torquing to 5
Nm (44 in-lb).
10. Check the operation of the multiswivel manifold
by rotating and tilting. Movement should be
smooth and free.
11. Test the operation of the hydraulic torque
wrench by connecting to the appropriate
pump unit. Keeping hands clear of the torque
wrench, advance and retract the torque wrench
several times, and observe the movement of
the shuttle mechanism to check for fee and
correct movement. Apply full pressure to the
torque wrench (690 bar/10,000 psi advance;
103 bar/1,500 psi retract), and check for
leaks.
CAUTION: Operating the hydraulic torque
wrench without the head attached exposes
the moving piston drive mechanism. Care
should be taken to prevent trapped fingers or
other injury.
NOTE: If the hydraulic couplings were
removed, verify that they are installed
into the correct yoke. The male coupling
assembles into the advance yoke and the
female coupling assembles into the retract
yoke. Apply hydraulic thread sealant
to the hydraulic coupling thread before
assembly. It is not advised to use thread
sealing tape as debris from the sealing
tape can contaminate the system.

Hydraulic Cylinder/Body Disassembly

It is only necessary to remove the hydraulic
cylinder/body components if seal replacement
is required. Seal replacement is carried out as
follows:
1. Verify body is fully retracted. Disconnect the
unit from the power supply. If attached, remove
the body from the direct fit head.
2. Attach open ended couplings to the multiswivel
manifold.
3. Pull the shuttle forward sufficiently to gain
access to the gland. Be prepared to catch oil
spillage vented from the retract coupling.
© SPX
Repair Procedures continued
4. See Figures 10 and 11. Using a pin wrench,
unscrew the gland.
Figure 10. Pin Wrench Unscrewing Gland
item
1
2
3
4
Figure 11. Gland Location
24
Description
Shuttle
Piston rod
Gland
Body
Form No. 1000529
Rev. 1 December 6, 2011