Sterling Trucks Acterra MX - Manual (Page 108)

42–08 Camshaft Bracket
Bushing Lubricating
IMPORTANT: Perform MOP 42–24 before lubri-
cating the camshaft brackets.
Pump multipurpose chassis grease (NLGI Grade 1 or
2) into the chamber bracket until it appears at the
slack adjuster end of the bracket. See
Fig. 4 . Use
care that no grease enters the drum cavity. If grease
leaks out under the camhead, the camshaft grease
seal is worn or damaged, or is installed backwards.
NOTE: The use of meter-type fittings, having a
maximum 40 psi (275 kPa) pressure relief at
shutoff, is recommended.
42–09 Automatic Slack
Adjuster Checking,
Meritor
WARNING
Manually adjusting an automatic slack adjuster to
bring the pushrod stroke within legal limits is
likely masking a mechanical problem. Adjustment
is not repairing. Before adjusting an automatic
slack adjuster, troubleshoot the foundation brake
system and inspect it for worn or damaged com-
ponents. Improperly maintaining the vehicle brak-
ing system may lead to brake failure, resulting in
property damage, personal injury, or death.
1. Inspect the slack adjuster for structural damage.
Replace the slack adjuster if needed.
2. Check the boot for cuts, tears, etc., and replace
it if necessary. See
Fig. 5 .
42–10 Automatic Slack
Adjuster Lubricating,
Meritor
IMPORTANT: Perform MOP 42–24 before lubri-
cating the slack adjusters.
Lubricate the slack adjuster using high-temperature,
waterproof grease NLGI Grade 1, Texaco Thermotex
EP 1, Shell Darina No. 1, Marathon 528 heavy-duty,
Sunaplex No. 1 EP, Amdex No. 1 EP, or Philube B
No. 1. It should be smooth-textured, corrosion-
resistant grease, free of fillers and abrasives.
f420011a 05/28/93
1
2
3
A
A. Grease exit.
1.
Brake Chamber
2. Slack Adjuster
3. Grease Fitting
Fig. 4, Camshaft Bracket Bushing Lubrication
f420012a 10/20/93
1
2
3
4
5
6
7
1. Brake Chamber
2. Clevis
3. Actuator Rod
4. Boot
5. Pull-Pawl
6. Manual Adjusting Nut
7. Grease Fitting (or Lube Plug)
Fig. 5, Meritor Automatic Slack Adjuster
Brakes
42
Acterra Maintenance Manual, October 2007 42/6