®
page 35
TD-42-T
Maintenance
Slack Adjuster Function Test
1. Remove the slack adjuster from the axle.
2. Using a torque wrench that measures in lb-in., rotate the adjusting nut counter-
clockwise 22 turns. This is enough turns of the adjusting nut to rotate the camshaft gear
1 full revolution. If the torque value remains below 25 lb-in. during this test, then the
slack adjuster is functioning normally.
COMPONENT DAMAGE!
In step 2 turn the adjusting nut in the counterclockwise direction ONLY!
If you turn the adjusting nut in the wrong direction while the pawl is en-
gaged, the pawl teeth will be damaged and the slack adjuster will not
automatically adjust the brake clearance. Replace damaged pawls be-
fore returning the vehicle to service.
3. If the torque value exceeds 25 lb-in. while making the 22 turns, then the slack
adjuster is not working correctly and should be rebuilt or replaced.
4. Reinstall the slack adjuster on the axle, and check the free stroke length. Adjust
if necessary.
For more information regarding the slack adjuster, refer to Meritor Maintenance
Manual 4B,
Automatic Slack Adjuster
.
Brake Lubrication
Every six months or 50,000 miles the brake system should be lubricated with NLGI
Grade 1 or 2 lithium base grease. There are three grease fittings for each wheel; one
on the slack adjuster, one on the inner cam bushing, and one on the outer cam bushing.
Add grease until fresh grease appears at the purge point of the component. Clean up
any excess grease thoroughly so that it will not attract dirt or contaminate the brake
linings.
For more information regarding brake lubrication, refer to Meritor Maintenance
Manual 14,
Trailer Axles,
Section 13.
BRAKE LINING CONTAMINATION!
Do not get grease or oil on the brake linings or drums.
M
A
I
N
T
E
N
A
N
C
E
WARNING
!
CAUTION
!
Summary of Contents for TD-42-T
Page 16: ...page 16 TD 42 T THIS PAGE LEFT BLANK INTENTIONALLY...
Page 41: ...page 41 TD 42 T THIS PAGE LEFT BLANK INTENTIONALLY...
Page 43: ...page 43 TD 42 T Parts P A R T S 1 5 Upper Latch Assembly 4 3 2 2 5 1 3 Lower Latch Assembly 4...
Page 47: ...page 47 TD 42 T Parts P A R T S 16 2 14 13 15 9 1 4 3 7 5 6 8 10 11 12...
Page 49: ...page 49 TD 42 T Parts P A R T S THIS PAGE LEFT BLANK INTENTIONALLY...
Page 51: ...page 51 TD 42 T P A R T S Parts 2 1 3 4 5 6 7 8 9 8 10 11 12 13 17 16 15 14...
Page 53: ...page 53 TD 42 T Parts THIS PAGE LEFT BLANK INTENTIONALLY...
Page 55: ...page 55 TD 42 T Parts P A R T S Detail shown on follow ing pages 4 7 5 6 2 1 3 3...
Page 57: ...page 57 TD 42 T Parts Hidden between ECU and tank P A R T S 13 5 20 22 18 17 4 21 13 6 19 15...