GILLIG LOW FLOOR, Руководство по обслуживанию

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Hydraulic System
328
Steering Gear Removal or Replacement
Removal
1. Block the coach body securely to prevent the coach from lowering and block the rear wheels to
prevent it from rolling.
Before going under the coach, block the coach body as explained in
“Jacking and Towing” in the Introduction to this manual. Block the
body so that it cannot lower onto anyone under the coach should the air
pressure in the front suspension be released.
2. Thoroughly clean off all outside dirt and grease from the gear, especially in the area of the hose
connections.
3. Disconnect the hydraulic supply and return lines from the steering gear. Be prepared to catch
spills from the lines and gear when the hoses are disconnected. Immediately plug or cap the lines
and the ports in the steering gear.
4. Disconnect the steering column lower U-joint following the procedure in “Steering Column Re -
moval” later in this chapter. Do not pound the universal joint or input shaft coupling on or off the
input shaft, as internal damage to the steering gear can result.
A chisel will help loosen the pitman arm. Use a puller if you cannot
remove the pitman arm with your hands.
If using a chisel to spread the pitman arm boss to loosen the pitman
arm for removal, keep a firm grip on the chisel. Failure to do this may
result in the chisel flying loose and causing injury. Never leave the chisel
wedged in the pitman arm boss. If you cannot remove the pitman arm
from the shaft with chisel and your hands, use a puller.
5. Remove the pitman arm nut, bolt, and arm from the sector shaft and record or mark the radial
position of the pitman arm to the sector shaft prior to removal of the pitman arm. Add alignment
marks to the arm and shaft, if necessary, to ensure correct alignment at reassembly.
6. Remove the four nuts from the bolts attaching the steering gear to the steering gear mounting
bracket at the front of the coach.