Versajust Slack Adjuster Inspection And Lubrication - freightliner CENTURY CLASS 2011 Maintenance Manual

Brakes
Manufacturer
Haldex
Meritor
Dana Spicer
* Long stroke design is indicated by a tag, or embossing, on the brake chamber.
†
Specifications are relative to a brake application with 80 to 90 psi (550 to 620 kPa) air pressure in the brake chambers.
‡
If type 36 chamber is used, slack length should be less than 6 inches.
42–11 Versajust Slack Adjuster
Inspection and
Lubrication
IMPORTANT: Perform the Brake Inspection
maintenance operation before lubricating the
slack adjusters.
1. Visually check for physical damage, such as bro-
ken air lines and broken or missing parts.
2. Using a quality multipurpose chassis lubricant,
NLGI Grade 2, lubricate the slack adjuster
Century Class Trucks Maintenance Manual, January 2016
Brake Chamber Stroke Specifications
Chamber
Type *
Standard Stroke
2-1/2-Inch Extended Stroke
3-Inch Extended Stroke
Standard Stroke
Long Stroke
Standard Stroke
Long Stroke
Standard Stroke
Long Stroke
Table 1, Brake Chamber Stroke Specifications
Max Applied Stroke: inch (mm)
†
Size
12
16
20
24
24
24
30
30
9
12
16
20
24
24
30
16L
20L
24L
24LS
30LS
through the grease fitting until clean lubricant
flows from the grease relief opening in the boot.
3. Perform the "In Service Inspection."
In Service Inspection
1. Apply and release the brakes several times while
observing the slack adjuster. The slack adjuster
and brake actuator should move freely, without
binding or interference, and should return to the
full released position. Observe the looseness that
exists between the clevis and adapter bushing
and the yoke and link pins and their mating parts
(clevis, body, link). Replace these parts if loose-
42
1-3/8 (35)
1-3/4 (44)
2 (51)
2-1/2 (64)
2 (51)
2-1/2 (64)
Less than 1-1/2 (38)
Less than 1-3/4 (44)
Less than 1-7/8 (48)
Less than 2 (51)
2 (51)
2-1/2 (64)
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