Cylinder Piston Nut Torque Specifications - JLG 1930ES Service Maintenance Manual

Table 4-2. Cylinder Piston Nut Torque Specifications
Description
Lift Cylinder
16. Push the piston onto the rod until it abuts the spacer
end and install the attaching nut.
Table 4-3. Holding Valve Torque Specifications
Description
Integrated Steer
Integrated Proportional Valve
Integrated Blocking Valve
Relief
Coil Nuts
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.
3121166
Nut Torque Setscrew
Value torque Value
250-300 ft lb
N/A
(339-407 Nm)
Torque Value
15 ft lb
(20 Nm)
15 ft lb
(20 Nm)
15 ft lb
(20 Nm)
33 ft lb
(45 Nm)
Hand Tighten
NOTE: Reverse the procedure Steer Cylinder Piston
Removal - Cyl. p/n-1684456 on page 4-12 for install-
ing the steer cylinder piston.
17. Remove the cylinder rod from the holding fixture.
18. Position the cylinder barrel in a suitable holding fix-
ture.
EXTREME CARE SHOULD BE TAKEN WHEN INSTALLING THE
CYLINDER 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 adequately
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 cyl-
inder head gland can be inserted into the barrel cyl-
inder.
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.
– JLG Lift –
SECTION 4 - HYDRAULICS
NOTICE
4-15