SECTION 4 - BASIC HYDRAULIC INFORMATION & SCHEMATICS
31215079
4-33
5. Tighten the capscrews evenly and progressively in
rotation to the specified torque value.
6. After the screws have been torqued, tap the tapered
bushing with a hammer (16 to 24 oz.) and brass shaft
(approximately 3/4" in diameter) as follows;
a. Place the shaft against the cylinder rod and in
contac t with the bushing in the spaces
between the capscrews.
b. Tap each space once; this means the tapered
bushing is tapped 3 times as there are 3 spaces
between the capscrews.
7. Re-torque the capscrews evenly and progressively in
rotation to the specified torque value.
8. Remove the cylinder rod from the holding fixture.
9. Place new guide locks and seals in the applicable
outside diameter grooves of the cylinder piston. (See
Figure 4-23.)
10. 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 BAR-
REL SURFACES.
11. 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.
12. Continue pushing the rod into the barrel until the
cylinder head gland can be inserted into the barrel
cylinder.
13. Secure the cylinder head gland using the washer ring
and socket head bolts.
14. 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.
15. If applicable, install the cartridge-type holding valve
and fittings in the rod port block, using new o-rings
as applicable. (See Table 4-13, Holding Valve Torque
Specifications).
16. Push the piston onto the rod until it abuts the spacer
end and install the attaching nut
WHEN REBUILDING THE C YLINDERS, APPLY MEDIUM STRENGTH
THREADLOCKING COMPOUND TO PISTON NUT AND SETSCREW, THEN
TORQUE PISTON NUT.
NOTE:
The Steer Cylinder uses snap rings to secure piston.
Figure 4-24. Tapered Bushing Installation
Figure 4-25. Seating the Tapered Bearing
Table 4-13. Holding Valve Torque Specifications
Description
Torque Value
Sun - 7/8 hex M20 x 1.5 thds
30 - 35 lb-ft
(41 - 48 Nm)
Figure 4-26. Rod Assembly Installation
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