GILLIG LOW FLOOR, Руководство по обслуживанию

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Brakes & Wheels
269
Breather Tube: Both ends of the connector tube must be engaged a minimum of 1/2" into each of the
flexible elbows. The tube must be glued to both of the elbows with a high quality rubber adhesive. These
units must be mounted with the breather tube in the upper half of the non-pressure chamber facing away
from the road surface.
Failure to operate the chamber without an external breather tube and
end cover cap intact and in good condition, will void the MGM brake
warranty without remedy.
Spring Brake Manual Release
When the spring brakes cannot be released using the operator’s controls or when there is not sufficient
air pressure in the air system, the springs brakes can be manually released as follows:
1. Before releasing brakes, chock the wheels of the coach to prevent a runaway.
2. Remove the plastic end cap from the spring chamber.
3. Using a 15/16" wrench, unscrew the release-nut and remove the nut, flat washer, and release-bolt
from their storage pocket on the side of chamber.
4. (Optional) For easier manual-releasing, apply a minimum of 90 psi air pressure to the inlet port
marked “Spring Brake,” but be sure to exhaust all air pressure after step 7.
5. Insert the release-bolt into the center hole of the head and, being sure that the formed end of the
bolt has entered the hole in the piston inside the chamber, continue to insert the bolt until it bot-
toms out. Be absolutely sure of correct bolt-to-piston engagement.
6. Turn the release-bolt 1/4 turn clockwise and pull the bolt out to lock the formed end into the pis -
ton. If the bolt does not lock into position in less than 1/2" outward movement, repeat steps 4 and
5 until you are sure it does lock.
7. Holding the bolt locked into the piston, install the flat washer and the release-nut on the end of
the release-bolt, and turn down the nut against the flat washer until finger tight.
Do not exceed the following lengths and do not exceed 50 ft-lb torque on
the release-nut at any time or damage may occur which could prevent
any further correct manual-releasing of the spring brake chamber.
8. Using a 15/16" hand wrench (do not use an impact wrench) turn the release-nut clockwise until
4" of bolt extend above the nut.
9. To reactivate the spring brake from its manually-released position, reverse the order of steps 1
through 7 above.
10. When reinstalling the release-bolt, flat washer and release-nut into the storage pocket, torque
them at 10 ft-lb on the nut against the flat washer.