3.Before removing worm shaft, measure height from top of adjusting screw to the slack adjuster body. This measurement is important, as it serves as a reference when the worm shaft is reassembled.
4.Press out worm shaft from worm by pressing in on the end of the worm shaft opposite the adjusting screw nut.
5.Remove worm shaft, worm shaft lock and worm lock spring.
6.Remove worm and slack adjuster worm gear from slack adjuster body.
TYPE 35 WITH POSITIVE LOCK MECHANISM
DISASSEMBLY
1.Remove retaining ring holding the cover, cover nut and gear in place.
2.Remove set screw in worm nut.
3.Depress worm lock and remove lock nut pin.
4.Remove worm lock and worm lock spring.
5.Unscrew worm nut.
6.Remove worm shaft, worm and gear from slack adjuster body.
7.Before removing worm shaft, measure height from top of adjusting screw to the slack adjusted body. This measurement is important, as it serves as a reference when the worm shaft is reassembled.
8.Press out the worm shaft from worm by pressing on the end of the worm shaft opposite the adjusting screw nut.
TYPE 35 AND TYPE 55 (WITHOUT RIVETED COVER) AND BALL INDENT LOCK MECHANISM DISASSEMBLY
1.Remove cam lock pin, cam lock, thrust washer, plunger spring and plunger.
2.Bend up tab of lock washer and remove worm nut.
3.Remove retaining ring and cover.
4.Before removing worm shaft, measure height from the top of adjusting screw to the slack adjuster body. This measurement is important, as it serves as a reference when the worm shaft is reassembled.
5.Remove worm and shaft and slack adjuster gear.
6.Remove plunger and plunger spring from body.
7.If worm gear is to be pressed from shaft, note dimension from end of shaft to gear before proceeding.
TYPE 35, 40, 55 (WITH RIVETED COVER AND BALL INDENT LOCK MECHANISM) DISASSEMBLY
1.Remove rivets holding the covers.
2.Remove welch plug.
3.Before removing ball indent lock mechanism, measure and note distance from top of lock screw head to slack adjuster body.
4.Remove ball indent lock mechanism screw.
5.Remove spring and ball.
6.Before removing worm shaft, measure height from top of adjusting screw to the slack adjuster body. This measurement is important, as it serves as a reference when the worm shaft is reassembled.
7.Press out worm shaft from worm by pressing on end of worm shaft opposite the adjusting nut.
8.Remove worm and slack adjuster worm gear.
CLEANING AND INSPECTION
Wash all parts in mineral spirits and dry. Inspect parts and replace any part showing signs of wear or deterioration.
TYPE 20 TO 30 WITH POSITIVE LOCK MECHANISM AND RIVETED COVER ASSEMBLY
1.Place worm and worm gear in slack adjuster body.
2.Position and press the worm shaft, worm shaft lock and spring into the worm and slack adjuster body. The recess in the worm shaft lock must be lined up with the pin in the slack adjuster body before pressing into position. Make certain that when pressing the worm shaft into the body that the height measurement between the top of the adjusting screw and slack adjuster body is the same before and after removal.
3.Install covers and rivet securely.
4.Install new welch plug in body.
5.Lubricate as outlined in “Preventive Maintenance” section.
TYPE 35 WITH POSITIVE LOCK MECHANISM ASSEMBLY
1.Press worm shaft into worm. Care should be exercised to be sure the worm shaft is pressed into the proper dimension.
2.Install the worm shaft, worm and gear in the slack adjuster body.
3.Make certain that when pressing the worm shaft into the body that the height measurement between the top of the adjusting screw and slack adjuster body is the same before and after removal.
4.Install worm lock guide pin in worm nut.
5.Screw the worm nut into slack adjuster body.
6.Install worm lock and worm lock spring over worm shaft and adjusting screw nut.
7.Depress worm lock and install lock nut pin in adjusting screw nut.
8.Install set screw in worm nut.
9.Assemble cover and cover nut to the body by installing the retaining ring.
10.Lubricate slack adjuster as outlined in “Preventive Maintenance” section.
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