MAHLE CWL-20, Руководство по эксплуатации

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en | 12 | CWL-20 Maintenance and Inspection
8.4 Air control unit cleaning instructions
Occasionally, pieces of rust, scale or dirt from the airlines
may become lodged under the rubber seals of the air
control unit. This may cause minor air leakage and the lift
system units may slowly raise or lower even though the air
control levers have not been actuated. This minor air
leakage is easily corrected by following the steps below
(refer to Fig. 12 for component identification):
Fig. 12: Air control unit component identification
1. Disconnect the three air hoses attached to the air
control unit.
2. Remove the valve bracket.
3. Remove the plug or plugs.
4. Use a stiff wire or pin punch to push the spool out of
the valve body.
5. Carefully examine the rubber seal for any dirt or
foreign material. If foreign material is embedded in the
rubber seal, remove the screw and cup from the end
of the spool, then remove and clean the rubber seal.
Turn the seal over and reassemble it into the cup.
Secure the cup back onto the end of the spool with
the screw.
6. Lubricate the spool with a light chassis grease.
7. Insert the spool with O-ring into the air inlet spool
port.
8. Insert the spool without O-ring into the air exhaust
spool port.
9. Insert the spring(s).
10. Apply thread sealant to the plug(s) and install the
plugs into the valve body. Do not over tighten the
plug(s), as the threads can very easily be damaged.
8.5 Lift table adjustment
The lift system has a 1/2-13 hex head cap screw
mounted inside the top weldment to allow the lift table to
be raised or lowered slightly. The cap screw has been
adjusted at the factory to provide 1/4" to 5/16" of
clearance between the bottom of the lift pads and the
floor.
To raise or lower the lift table, follow the lift table
adjustment steps below:
1. Place the lifts on a level floor in a suitable open area.
2. Raise both lifts onto their lowest downstop.
3. Loosen the jam nut and turn the cap screw a few
turns in the required direction. Clockwise raises the lift
table, counterclockwise lowers it. (See Fig. 13 for
identification.)
Fig. 13: Lift table clearance adjustment
4. Tighten the jam nut.
5. Lower the lift to its lowest position and check the lift
table height above the floor.
Repeat the adjustment as needed until each lift has a
minimum of 1/8" clearance between the lift table bottom
and the floor. With the lift table resting on the floor, the
lifts may not easily move around the shop floor.
Capscrew
Jam Nut
Lift Table