JLG 3246ES Service Manual - Manual (Page 117)

SECTION 4 - HYDRAULICS
3121166 – JLG Lift – 4-15
16. Push the piston onto the rod until it abuts the
spacer end and install the attaching nut.
WHEN REBUILDING THE CYLINDERS, APPLY LOCTITE #242 TO
THE PISTON NUT AND SETSCREW, THEN TORQUE PISTON NUT.
REFER TO TABLE 4-2, CYLINDER PISTON NUT TORQUE SPECIFI-
CATIONS.
NOTE: Reverse the procedure Steer Cylinder Piston Removal
- Cyl. p/n-1684456 on page 4-12 for installing the
steer cylinder piston.
17. Remove the cylinder rod from the holding fixture.
18. Position the cylinder barrel in a suitable holding
fixture.
NOTICE
EXTREME CARE SHOULD BE TAKEN WHEN INSTALLING THE CYL-
INDER ROD, HEAD, AND PISTON. AVOID PULLING THE ROD OFF-
CENTER, WHICH COULD CAUSE DAMAGE TO THE PISTON AND
CYLINDER BARREL SURFACES.
19. With barrel clamped securely, and while ade-
quately supporting the rod, insert the piston end
into the barrel cylinder. Ensure that the piston
loading o-ring and seal ring are not damaged or
dislodged.
20. Continue pushing the rod into the barrel until the
cylinder head gland can be inserted into the barrel
cylinder.
21. If applicable, secure the cylinder head retainer
using a suitable chain wrench.
22. After the cylinder has been reassembled, the rod
should be pushed all the way in (fully retracted)
prior to the reinstallation of any holding valve or
valves.
23. If applicable, install the cartridge-type holding
valve and fittings in the port block using new o-
rings as applicable. Refer to Table 4-3, Holding
Valve Torque Specifications.
Table 4-3. Holding Valve Torque Specifications
Description Torque Value
Integrated Steer
15 ft lb
(20 Nm)
Integrated Proportional Valve
15 ft lb
(20 Nm)
Integrated Blocking Valve
15 ft lb
(20 Nm)
Relief
33 ft lb
(45 Nm)
Coil Nuts Hand Tighten