JLG 26MRT, Service & Maintenance

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SECTION 2 - PROCEDURES
3120791 – JLG Sizzor – 2-9
10. Install the bolts into the bushing using Loctite #242.
Refer to Table 2-1, Cylinder Component Torque
Specifications for proper bolt torque values.
11. Remove the cylinder rod from the holding fixture.
12. Place new guidelocks and hydrolock seals in the
applicable outside diameter grooves of both the pis-
ton and the cylinder head. Refer to Piston Seal Kit
Installation illustration.
13. 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.
14. With the barrel clamped securely, and while ade-
quately supporting the rod, insert the piston end into
the cylinder barrel. Ensure that the piston loading o-
ring and seal ring are not damaged or dislodged.
15. Continue pushing the rod into the barrel until the cyl-
inder head gland can be inserted into the cylinder
barrel.
16. Secure the cylinder head gland using the washer
ring and socket head bolts.
17. 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.
18. If applicable, install the cartridge-type holding valve
and fittings in the port block using new o-rings as
19. applicable.
Figure 2-10. Tapered Bushing Installation
Table 2-1. Cylinder Component Torque Specifications
Componente
Torque Value
(w/Loctite)
Tapered Bushing Retaining Screws - Lift Cylinder 80 ft lb
(108 Nm)
Head Retaining Screws - Lift Cylinder 9 ft lb
(12 Nm)
Table 2-2. Holding Valve Torque Specifications
Description Torque Value
Sun - 7/8 hex M20 x 1.5 thds 30 - 35 ft lb 41 - 48 Nm
Sun - 1-1/8 hex 1 - 14 UNS thds 45 - 50 ft lb 61 - 68 Nm
Sun - 1-1/4 hex M36 x 2 thds 150 - 153 ft lb 204 - 207 Nm
Racine - 1-1/8 hex 1-1/16 - 12 thds 50 - 55 ft lb 68 - 75 Nm
Racine - 1-3/8 hex 1-3/16 - 12 thds 75 - 80 ft lb 102 - 109 Nm
Racine - 1-7/8 hex 1-5/8 - 12 thds 100 - 110 ft lb 136 - 149 Nm
Figure 2-11. Rod Assembly Installation