Brake Adjustment Procedure; Plug Removal And Replacement; Disc Parking Brake - Skyjack SJ-7027 Operating, Maintenance And Parts Manual

Brake Adjustment Procedures
1. Place machine on level surface and block wheels
to prevent rolling in either direction.
2. Turn Battery disconnect off.
3. Locate brake manifold in hydraulic/electric side
cabinet.
4. Depress and turn the red knurled knob on the
brake valve counter-clockwise to a fully closed
position or depress black knob. (current manifold)
5. Grasp the red plunger and rapidly depress until
plunger can no longer be depressed and the
brake is fully released.
6. Inspect caliper and brake pads for binding. Pads
should move freely on the pins.
7. Remove pin from brake cylinder clevis and brake
actuating lever. Rotate actuating lever counter-
clockwise to the end of it's stroke.
8. Adjust brake cylinder clevis to obtain 1/2"
between the center of the holes of the actuating
lever and brake cylinder clevis. See Figure 5-1.
Tighten jamb nut on brake cylinder rod against
clevis. Note: It is important that the brake cylinder
reaches it's maximum stroke before the caliper
to prevent damage to the caliper.
Figure 5-1. Brake Adjustment
9. Reinstall clevis pin back into the clevis actuating
lever.
10. Remove plastic plug located on the end of the
caliper shaft. See Figure 5-2.
SECTION 5, Page 6
Figure 5-2. Plug Removal and Replacement
11. Using a 1/4" Allen wrench, turn brake adjuster
counter-clockwise until it bottoms out. Turn Allen
wrench clockwise 1/2 turn clockwise to set
adjustment.
12. Replace plastic plug back into the end of the
caliper shaft.
13. Depress red knurled knob on brake valve and turn
clockwise to a fully open position.
14. Remove Wheel blocks. Turn emergency power
disconnect switch on. Operate drive several times
to seat pads to brake disc.
Winching And Towing Procedures
When Towing, DO NOT
or brake the towing vehicle rapidly.
Parking Brake System
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Figure 2-12. Disc Parking Brake
1 - 3. Parking Brake Disc -This device disengages
the brake disc (1) when driving forward or in reverse. A
hydraulic brake cylinder (2), linked to a disc caliper
(3), engages and disengages a brake disc on the rear
axle drive shaft yoke. The brake MUST be manually
disengaged for pushing, towing or winching.
push or tow the work platform onto a downward
slope or pull the platform down an incline towards the
winch. The special procedure for manually disengaging
the parking brake is as follows:
SJ-600 Series Engine Powered
June 2001
Warning
drive onto a downward slope
DO NOT
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