JLG 1250AJP Service Manual - Manual (Page 377)

SECTION 5 - HYDRAULICS
3121171 – JLG Lift – 5-23
20. Secure the cylinder head gland using the washer
ring and socket head bolts. (See Table 5-1, Cylinder
Head and Tapered Bushing Torque Specifications
and Table 5-2, Holding Valve Torque Specifications)
21. 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.
22. If applicable, install the cartridge-type holding valve
and fittings in the rod port block, using new o-rings
as applicable. (See Table 5-2, Holding Valve Torque
Specifications)
Figure 5-27. Rod Assembly Installation
Table 5-1. Cylinder Head and Tapered Bushing Torque
Specifications
Description
Head Torque
Value (Wet)
Tapered
Bushing Torque
Value (Wet)
Tower Tele Cylinder 80 ft. lbs.
(108 Nm)
9 ft. lb.s
(12.6 Nm)
Main Boom Tele
Cylinder 80 ft. lbs.
(108 Nm)
9 ft. lb.s
(12.6 Nm)
Level Cylinder 120 ft. lbs.
(168 Nm)
9 ft. lb.s
(12.6 Nm)
Jib Cylinder 30 ft. lbs.
(41 Nm)
5 ft. lbs.
(9 Nm)
Tower Lift Cylinder 420 ft. lbs.
(588 Nm)
60 ft. lbs.
(81 Nm)
Main Boom Lift Cylinder 420 ft. lbs.
(588 Nm)
135 ft. lbs.
(183 Nm)
Axle Oscillation
Cylinder 120 ft. lbs.
(168 Nm)
9 ft. lb.s
(12.6 Nm)
Axle Extend
Cylinder 50 ft. lbs.
(70 Nm)
9 ft. lb.s
(12.6 Nm)
Table 5-2. Holding Valve Torque Specifications
Description Torque Value
SUN - 7/8 HEX M20 X 1.5 THDS.
30-35 ft. lbs.
(41-48 Nm)
SUN - 1 1/8 HEX 1 -14 UNS THDS.
45-50 ft. lbs.
(61-68 Nm)
SUN - 1 1/4 HEX M36 X 2 THDS.
150-160 ft. lbs.
(204-217 Nm)
RACINE - 1 1/8 HEX 1 1/16 - 12 THDS.
50-55 ft. lbs.
(68-75 Nm)
RACINE - 1 3/8 HEX 1 3/16 - 12 THDS.
75-80 ft. lbs.
(102-109 Nm)
RACINE - 1 7/8 HEX 1 5/8 - 12 THDS.
100-110 ft. lbs.
(136-149 Nm)