JLG 25RTS, Обслуживание и техническое обслуживание

Страница: 24 / 84

SECTION 2 - PROCEDURES
2-8 – JLG Sizzor – 3120826
4. If applicable, remove the cartridge-type holding
valve and fittings from the cylinder port block. Dis-
card o-rings.
5. Tap around outside of cylinder head retainer with a
suitable hammer to shatter loctite.
6. Using a suitable chain wrench, loosen the cylinder
head retainer, if applicable, and/or cylinder head
gland, and remove from cylinder barrel.
7. Attach a suitable pulling device to the cylinder rod
port block end or cylinder rod end, as applicable.
EXTREME CARE SHOULD BE TAKEN WHEN REMOVING THE CYL-
INDER ROD, HEAD, AND PISTON. AVOID PULLING THE ROD OFF-
CENTER, WHICH COULD CAUSE DAMAGE TO THE PISTON AND
CYLINDER BARREL SURFACES.
8. With the barrel clamped securely, apply pressure to
the rod pulling device and carefully withdraw the
complete rod assembly from the cylinder barrel.
9. Using suitable protection, clamp the cylinder rod in
a vise or similar holding fixture as close to the piston
as possible.
10. Remove the set screw(s), if applicable, and nut
which attach the piston to the rod, and remove the
piston. Discard set screws.
NOTE: Steer Cylinder has two retainers at each end of cylin-
der.
11. This step only applies to the steer cylinder, remove
snap rings from rod which attach the piston to the
rod.
12. Remove and discard the piston o-rings, seal rings,
and wear rings.
13. Remove piston spacer, and head, from the rod. Dis-
card the o-rings, back-up rings, rod seals, and wiper
seals.
14. Remove the cylinder head gland. Remove the rod
from the holding fixture.
Figure 2-6. Holding Valve and Fitting Removal
Figure 2-7. Cylinder Rod Support
Figure 2-8. Steer Cylinder Snap Ring Removal