Brake Stroke Adjustment Verification

Inspection template for verifying brake stroke adjustment, including chamber type, slack adjuster condition, and applied stroke measurements in line with FMCSR requirements.

Inspection Setup and Vehicle Identification

• Vehicle/unit identification recorded
  Record unit number, VIN, trailer number if applicable, and inspection date/time.
• Brake system type confirmed as air brake system
  Verify the vehicle is equipped with an air brake system subject to stroke adjustment verification.
• Inspection conditions suitable for measurement
  Verify the vehicle is safely secured, wheels chocked as needed, and the inspector can access brake components without obstruction.
• Axle and wheel positions selected for inspection
  Select all wheel positions inspected.
• Reference standard or procedure used
  Document the applicable FMCSR-based procedure, fleet SOP, or service manual used for the inspection.

Brake Chamber Type and Condition

• Brake chamber type identified and matches axle application
  Record the chamber type observed for each inspected wheel position.
• Brake chamber mounting secure and free of visible damage
  Check for loose mounting hardware, cracked housings, corrosion, or air leakage at the chamber.
• Pushrod and yoke connection secure
  Verify the pushrod, clevis, and pin connection are properly secured and not excessively worn.
• Brake chamber pushrod boot intact
  Inspect the dust boot for tears, missing sections, or contamination that could affect chamber performance.
• Air leakage observed at chamber or fittings
  Indicate whether audible or visible air leakage is present at the chamber, fittings, or hose connections.

Slack Adjuster and Foundation Brake Condition

• Slack adjuster type identified
  Record the slack adjuster type observed.
• Slack adjuster condition acceptable
  Check for cracks, bent components, excessive wear, missing hardware, or improper installation.
• Slack adjuster free play within acceptable condition
  Verify the slack adjuster is not seized and moves appropriately during brake application and release.
• Foundation brake components in serviceable condition
  Inspect S-cam, rollers, bushings, return springs, and related hardware for wear or damage that could affect stroke measurement.
• Brake lining and drum condition acceptable
  Check for lining wear, contamination, scoring, cracks, or other conditions that may indicate a brake deficiency.

Applied Stroke Measurement

• Applied stroke measured at full brake application
  Enter the measured applied stroke or pushrod travel for the inspected brake.
• Maximum allowable stroke for chamber type documented
  Enter the applicable maximum allowable stroke for the identified chamber type and brake configuration.
• Applied stroke within allowable limit
  Confirm the measured applied stroke does not exceed the applicable maximum allowable stroke for the chamber type.
• Measurement method documented
  Record how the stroke measurement was taken.
• Brake application pressure or test condition recorded
  Document the applied test condition used during measurement, such as service brake application pressure or inspection method.

Deficiencies, Corrective Action, and Release

• Deficiencies identified
  Select all deficiencies observed during the inspection.
• Corrective action required
  Indicate whether repair, adjustment, or further evaluation is required before the vehicle is returned to service.
• Vehicle released for service
  Confirm whether the vehicle is approved for continued operation after inspection and any required corrections.
• Inspector signature
  Inspector signs to confirm the accuracy of the brake stroke adjustment verification.