Record the pushrod stroke while the unit is in front of you
Brake Stroke Card helps diesel and trailer brake techs record the pushrod stroke they measured, match it to the right chamber readjustment limit, and export a clean axle sheet for the repair order. Pro purchase and restore use Google Play billing.
The app is a field aid. It does not inspect the vehicle, make an authority call, or replace OEM service data, the chamber stamp, or a qualified inspector.
Workflow
Chamber match
Pick chamber type, size, and stroke class so the reading is checked against the right limit.
Live margin
Enter the tape value as a fraction or decimal and see margin plus PASS, WATCH, or FAIL.
20 percent line
Count defective brakes against the out-of-service threshold for the unit layout in front of you.
Repair-order proof
Export local PDF axle sheets free. Pro adds photo labels for chalk marks or chamber markings plus CSV and JSON export.
FAQ
What does it do?
It records brake-stroke readings, chamber limits, margins, notes, photos, and export sheets for diesel and trailer brake work.
Does it make the authority call?
No. It documents and calculates from entered values; the qualified inspector and applicable rules remain the authority.
Does it need a signal?
Core field work runs on the phone. Pro purchase, restore, and entitlement checks use Google Play billing when network is available.
Pricing
Free
Log readings, match chamber limits, see margin and PASS / WATCH / FAIL, and export PDF axle sheets.
Pro — $9.99 one-time
Camera photo labels for chalk marks and chamber markings, plus CSV and JSON export. No subscription.