Air Brake Slack Adjusters at Trailer Parts Superstore
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Air Brake Slack Adjusters

Air Brake Slack Adjusters

Trailer Parts Superstore offers a great selection of Automatic and Manual Slack Adjusters from SIRCO which are direct replacements for most popular manufacturers.
Automatic slack adjuster features an adjust on stroke return, external bracket actuation, clearance sensing and a bolt on solid bracket.
Manual slack adjuster features a zinc-dichromate finish, positive locking adjustment, heat treated alloy gears, threaded grease fittings, and a bi-directional body design.

Trailer Parts Tech Tip: How Air Brakes Work

Quantity Description Price

SIRCO Manual Slack Adjuster - 10 Spline #S2010A

SIRCO Manual Slack Adjuster - 10 Spline #S2010A

Stock# 5446132
1-1/2" - 10 spline manual slack adjuster features a zinc-dichromate finish, positive locking adjustment, heat treated alloy gears, threaded grease fittings, and a bi-directional body design. The Sirco S2010A adjuster has 5", 6" and 7" holes.

$14.95

SIRCO Manual Slack Adjuster - 28 Spline #S2011A

SIRCO Manual Slack Adjuster - 28 Spline #S2011A

Stock# 5446133
1-1/2" - 28 spline manual slack adjuster features a zinc-dichromate finish, positive locking adjustment, heat treated alloy gears, threaded grease fittings, and a bi-directional body design. The Sirco S2011A0 adjuster has 5" and 6" .

$14.95

SIRCO Manual Slack Adjuster - 28 Spline #S2022A

SIRCO Manual Slack Adjuster - 28 Spline #S2022A

Stock# 5446135
1-1/2" - 28 spline manual slack adjuster features a zinc-dichromate finish, positive locking adjustment, heat treated alloy gears, threaded grease fittings, and a bi-directional body design. The Sirco S2022A adjuster has 5", 6" and 7" holes.

$14.95

SIRCO Gunite Style Automatic Slack Adjuster - 28 Spline #SA1140

SIRCO Gunite Style Automatic Slack Adjuster - 28 Spline #SA1140

Stock# 5446136
1-1/2" - 28 spline Gunite style automatic slack adjuster features an adjust on stroke return, external bracket actuation, clearance sensing and a bolt on solid bracket. The Sirco SA1140 adjuster has a 5-1/2" arm length.

$55.50

SIRCO Haldex Style Automatic Slack Adjuster - 28 Spline #SA10211

SIRCO Haldex Style Automatic Slack Adjuster - 28 Spline #SA10211

Stock# 5446137
1-1/2" - 28 spline Haldex style automatic slack adjuster features an adjust on stroke return, external bracket actuation, clearance sensing and a bolt on solid bracket. The Sirco SA10211 adjuster has a 5-1/2" arm length.

$55.50

SIRCO Manual Slack Adjuster - 28 Spline #S2019A

SIRCO Manual Slack Adjuster - 28 Spline #S2019A

Stock# 5446138
-1/2" - 28 spline manual slack adjuster features a zinc-dichromate finish, positive locking adjustment, heat treated alloy gears, threaded grease fittings, and a bi-directional body design. The Sirco S2019A adjuster has 5-1/2" and 6-1/2" holes.

$14.95

SIRCO Gunite Style Automatic Slack Adjuster - 28 Spline #SA1141

SIRCO Gunite Style Automatic Slack Adjuster - 28 Spline #SA1141

Stock# 5446139
1-1/2" - 28 spline Gunite style automatic slack adjuster features an adjust on stroke return, external bracket actuation, clearance sensing and a bolt on solid bracket. The Sirco SA1141 adjuster has a 6" arm length.

$55.50

SIRCO Meritor Style Automatic Slack Adjuster - 28 Spline #SA1074

SIRCO Meritor Style Automatic Slack Adjuster - 28 Spline #SA1074

Stock# 5446140
1-1/2" - 28 spline Meritor style automatic slack adjuster features an adjust on stroke return, external bracket actuation, clearance sensing and a bolt on solid bracket. The Sirco SA1074 adjuster has a 6" arm length.

$55.50

SIRCO Crewson Style Automatic Slack Adjuster - 28 Spline #SA22102

SIRCO Crewson Style Automatic Slack Adjuster - 28 Spline #SA22102

Stock# 5446141
1-1/2" - 28 spline Crewson style automatic slack adjuster features an adjust on stroke return, external bracket actuation, clearance sensing and a bolt on solid bracket. The Sirco SA22102 adjuster has a 5-1/2" and 6-1/2" arm length.

$55.50

SIRCO Crewson Style Automatic Slack Adjuster - 28 Spline #SA22103

SIRCO Crewson Style Automatic Slack Adjuster - 28 Spline #SA22103

Stock# 5446142
1-1/2" - 28 spline Crewson style automatic slack adjuster features an adjust on stroke return, external bracket actuation, clearance sensing and a bolt on solid bracket. The Sirco SA22103 adjuster has a 5" and 6" arm length.

$55.50

SIRCO Manual Slack Adjuster - 10 Spline #S2020A

SIRCO Manual Slack Adjuster - 10 Spline #S2020A

Stock# 5446143
1-1/2" - 10 spline manual slack adjuster features a zinc-dichromate finish, positive locking adjustment, heat treated alloy gears, threaded grease fittings, and a bi-directional body design. The Sirco S2020A adjuster has 5-1/2"and 6-1/2" holes.

$14.95

SIRCO Haldex Style Automatic Slack Adjuster - 28 Spline #SA10212

SIRCO Haldex Style Automatic Slack Adjuster - 28 Spline #SA10212

Stock# 5446144
1-1/2" - 28 spline Haldex style automatic slack adjuster features an adjust on stroke return, external bracket actuation, clearance sensing and a bolt on solid bracket. The Sirco SA10212 adjuster has a 6" arm length.

$55.50

SIRCO Haldex Style Automatic Slack Adjuster - 10 Spline #SA10103

SIRCO Haldex Style Automatic Slack Adjuster - 10 Spline #SA10103

Stock# 5446145
1-1/2" - 10 spline Haldex style automatic slack adjuster features an adjust on stroke return, external bracket actuation, clearance sensing and a bolt on solid bracket. The Sirco SA10103 adjuster has a 6" arm length.

$55.50

SIRCO Manual Slack Adjuster - 37 Spline #S2012A

SIRCO Manual Slack Adjuster - 37 Spline #S2012A

Stock# 5446146
1-5/8" - 37 spline manual slack adjuster features a zinc-dichromate finish, positive locking adjustment, heat treated alloy gears, threaded grease fittings, and a bi-directional body design. The Sirco S2012A adjuster has a 6" hole.

$14.95

SIRCO Crewson Style Automatic Slack Adjuster - 28 Spline #SA22953

SIRCO Crewson Style Automatic Slack Adjuster - 28 Spline #SA22953

Stock# 5446147
1-1/2" - 28 spline Crewson style automatic slack adjuster features an adjust on stroke return, external bracket actuation, clearance sensing and a bolt on solid bracket. The Sirco SA22953 adjuster has a 5" and 6" arm length.

$55.50

SIRCO Gunite Style Automatic Slack Adjuster - 10 Spline #SA1132

SIRCO Gunite Style Automatic Slack Adjuster - 10 Spline #SA1132

Stock# 5446148
1-1/2" - 10 spline Gunite style automatic slack adjuster features an adjust on stroke return, external bracket actuation, clearance sensing and a bolt on solid bracket. The Sirco SA1132 adjuster has a 5-1/2" arm length.

$55.50

SIRCO Crewson Style Automatic Slack Adjuster - 10 Spline #SA21102

SIRCO Crewson Style Automatic Slack Adjuster - 10 Spline #SA21102

Stock# 5446149
1-1/2" - 28 spline Crewson style automatic slack adjuster features an adjust on stroke return, external bracket actuation, clearance sensing and a bolt on solid bracket. The Sirco SA22953 adjuster has a 5" and 6" arm length.

$55.50

SIRCO Haldex Style Automatic Slack Adjuster - 28 Spline #SA10101

SIRCO Haldex Style Automatic Slack Adjuster - 28 Spline #SA10101

Stock# 5446150
1-1/2" - 28 spline Haldex style automatic slack adjuster features an adjust on stroke return, external bracket actuation, clearance sensing and a bolt on solid bracket. The Sirco SA10101 adjuster has a 5-1/2" and 6-1/2" arm length.

$55.50

SIRCO Bendix Style Automatic Slack Adjuster - 28 Spline #SA2174

SIRCO Bendix Style Automatic Slack Adjuster - 28 Spline #SA2174

Stock# 5446151
1-1/2" - 28 spline Bendix style automatic slack adjuster features an adjust on stroke return, external bracket actuation, clearance sensing and a bolt on solid bracket. The Sirco SA2174 adjuster has a 5-1/2" arm length.

$55.50