hose (6) connecting the tank with the hydraulic oil pump and drain the oil from the pump and hose.
c. Filling. Connect the bottom hose (6) with the tank (3) and tighten the pipe plug (7) on the bottom of the tank. Fill
the hydraulic oil tank (3) through the filler hose (9) on the top of the steering roll cover. Tank will be full when the hydraulic
oil starts to run from the pet cock (8). Tighten all hose clamps (1) and check the tank for leaks.
d. Removal.
(1) Drain the hydraulic system (b above).
(2) Loosen the hose clamp (1) and disconnect the filler hose (9) from the hydraulic oil tank (3).
(3) Loosen the hose clamp (1) and disconnect the tank to valve hose (2) from the hydraulic oil tank (3).
(4) Unscrew and remove the mounting nuts (5) and lockwashers (4).
(5) Pull the hydraulic oil tank (3) away from its mounting studs and remove the tank.
(6) Unscrew and remove the pet cock (8) from the hydraulic oil tank (3).
e. Cleaning. Wash the hydraulic oil tank in cleaning solvent and blow it dry with clean compressed air. Clean the
mounting nuts and lockwashers with a stiff wire brush and cleaning solvent. Wipe off the rubber hoses with soft absorbent
cloth.
f. Inspection.
(1) Inspect the hydraulic oil tank for breaks, cracks, splitting welds, and damage. Weld small cracks and
breaks. Replace the hydraulic oil tank if it is badly dented or corroded.
(2) Inspect the rubber hoses for swollen, peeling, and cut rubber. Hold the hoses against the light and inspect
the inside of the hoses for deteriorated and swollen or cut rubber. Replace all damaged or worn rubber
hoses.
(3) Check the hose clamps for twisting, breaks, cracks, corrosion, and damaged clamp screws and nuts.
Replace damaged, corroded, or worn clamps.
(4) Check the pet cock and drain plug for damaged, corroded, stripped, or galled thread. Replace leaking pet
cock. Replace the drain plug if the threads are corroded or damaged.
1
Hose clamp
6 Hose, tank to pump (1 1/4 ID x 15 1/2)
2
Hose, tank to valve (1 1/4 ID x 19)
3
Oil tank body
7 Plug, pipe, std, 3/4
4
Washer, lock, std, 5/16 (4 req'd)
8 Pet cock, std, 1/8
5
Nut, hex, 5/16-18NC (4 req'd)
9 Filler hose (1 ID x 21 1/2)
Figure 68-Continued.
171
