Service Manual Manual

SECTION 5 - HYDRAULICS
5-8 – JLG Lift – 3120840
IF THE CYLINDER IS TO BE TESTED PRIOR TO INSTALLATION ON
THE MACHINE, EXTREME CARE SHOULD BE USED TO INSURE
THAT THE OUTER END OF THE ROD IS SUPPORTED. USE
EITHER A TRAVELING OVERHEAD HOIST, FORK-LIFT, OR OTHER
MEANS TO SUPPORT THE OVERHANGING WEIGHT OF THE
EXTENDING ROD.
Ta b l e 5 - 1 . Cylinder Head and Tapered Bushing Torque
Specifications. (S Models)
Description
Head Torque
Value (Wet)
Ta pere d B us hi ng
To r qu e Val u e
(Wet)
Lift Cylinder 275 ft. lbs.
(373 Nm)
30 ft. lbs.
(41 Nm)
Articulating Lift
Cylinder
30 ft. lbs.
(41 Nm)
5 ft. lbs.
(9 Nm)
Slave Cylinder 30 ft. lbs.
(41 Nm)
5 ft. lbs.
(9 Nm)
Master Cylinder 30 ft. lbs.
(41 Nm)
5 ft. lbs.
(9 Nm)
Tele sc o p e
Cylinder
50 ft. lbs.
(68 Nm)
9 ft. lbs.
(12 Nm)
Lockout Cylinder 80 ft. lbs.
(109 Nm)
N/A
Articulating Slave
Cylinder
50 ft. lbs.
(68 Nm)
9 ft. lbs.
(12 Nm)
Articulating
Master Cylinder
50 ft. lbs.
(68 Nm)
9 ft. lbs.
(12 Nm)
Steer Cylinder Piston Nut Torque Specifications
Steer Cylinder LBS. NM
150 ft. lbs 204 Nm
Ta b l e 5 - 2 . Holding Valve Torque Specifications
Description Tor q ue Va l u e
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)
Tab l e 5 - 3 . Cylinder Head and Tapered Bushing Torque
Specifications. (A Models)
Description
Head Torque
Value (Wet)
Tapered Bushing
To r qu e Va lu e
(Wet)
Upper Lift
Cylinder
80 ft. lbs.
(109 Nm)
9 ft. lbs.
(12 Nm)
Lower Lift
Cylinder
420 ft. lbs.
(570 Nm)
30 ft. lbs.
(41 Nm)
Articulating Lift
Cylinder
30 ft. lbs.
(41 Nm)
5 ft. lbs.
(9 Nm)
Articulating Slave
Cylinder
50 ft. lbs.
(68 Nm)
9 ft. lbs.
(12 Nm)
Articulating
Master Cylinder
50 ft. lbs.
(68 Nm)
9 ft. lbs.
(12 Nm)
Master Cylinder 30 ft. lbs.
(41 Nm)
5 ft. lbs.
(9 Nm)
Upper Telescope
Cylinder
30 ft. lbs.
(41 Nm)
9 ft. lbs.
(12 Nm)
To w e r Te l e s c op e
Cylinder
30 ft. lbs.
(41 Nm)
9 ft. lbs.
(12 Nm)
Upright Level
Cylinder
275 ft. lbs.
(373 Nm)
30 ft. lbs.
(41 Nm)
Lockout Cylinder 80 ft. lbs.
(109 Nm)
N/A
Slave Cylinder 30 ft. lbs.
(41 Nm)
9 ft. lbs.
(12 Nm)
Steer Cylinder Piston Nut Torque Specifications
Steer Cylinder LBS. Nm
150 ft. lbs 204 Nm