Lubricating the Slack Adjuster
Important: Perform Parking Brake Operational Check, Air Disc Brakes, Axial Mounted Brakes, Bendix Calipers and Drum Brakes before lubricating the camshaft brackets.
Automatic slack adjusters must be lubricated periodically to ensure proper brake operation.
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 components. Improperly maintaining the vehicle braking system may lead to brake failure, resulting in property damage, personal injury, or death.
Haldex
Notice: Do not use moly-disulfide-loaded grease or oil. Both the life and reliability of the slack adjuster will be reduced if this type of grease is used.
Lubricate a Haldex automatic slack adjuster at the grease fitting with any extreme-pressure NLGI Grade 1 or Grade 2 grease if the operating temperature is –20°F (–29°C) and above. If the operating temperature is below –20°F (–29°C), use a low-temperature extreme-pressure grease.
Meritor
Lubricate the slack adjuster at the grease fitting until grease is forced past the pressure-relief capscrew or past the gear splines around the inboard snap ring. Use high-temperature, NLGI Grade 1 waterproof grease. See Fig..
Fig. 1, Meritor Automatic Slack Adjuster (other slack adjustors are similar)
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Brake Chamber
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ClevisActuator Rod
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Boot
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Pull-Pawl Seal
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Manual Adjusting Nut
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Grease Fitting (or Lube Plug)
Bendix
Using a quality multipurpose chassis lubricant, NLGI Grade 2, lubricate the automatic slack adjuster through the lube fitting. See Fig.. Lubricate the slack adjuster until clean lubricant flows from the grease relief opening in the boot.
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Yoke
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Yoke Pin
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Link Pin
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Link
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Boot
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Lube Fitting
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Worm Gear