Seating The Tapered Bearing - JLG 600A Service And Maintenance Manual

b. Tap each space once; this means the tapered
bushing is tapped 3 times as there are 3 spaces
between the capscrews.
Figure 5-12. Seating the Tapered Bearing
14. Retorque the capscrews evenly and progressively in
rotation to the specified torque value. (See Table 5-2,
Cylinder Head and Tapered Bushing Torque Specifi-
cations.
15. Remove the cylinder rod from the holding fixture.
16. Place new guide locks and seals in the applicable
outside diameter grooves of the cylinder piston.
(See Figure 5-10.)
17. Position the cylinder barrel in a suitable holding fix-
ture.
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.
18. 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.
19. Continue pushing the rod into the barrel until the cyl-
inder head gland can be inserted into the barrel cyl-
inder.
3121201
20. Secure the cylinder head gland using the washer
ring and socket head bolts. (See Table 5-2.)
Figure 5-13. Rod Assembly Installation
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 5-1, Holding Valve Torque
Specifications).
Table 5-1. Holding Valve Torque Specifications
Description
SUN - 7/8 HEX M20 X 1.5 THDS.
SUN - 1 1/8 HEX 1 -14 UNS THDS.
SUN - 1 1/4 HEX M36 X 2 THDS.
RACINE - 1 1/8 HEX 1 1/16 - 12 THDS.
RACINE - 1 3/8 HEX 1 3/16 - 12 THDS.
RACINE - 1 7/8 HEX 1 5/8 - 12 THDS.
– JLG Lift –
SECTION 5 - HYDRAULICS
Torque Value
30-35 ft. lbs.
(41-48 Nm)
45-50 ft. lbs.
(61-68 Nm)
150-160 ft. lbs.
(204-217 Nm)
50-55 ft. lbs.
(68-75 Nm)
75-80 ft. lbs.
(102-109 Nm)
100-110 ft. lbs.
(136-149 Nm)
5-9