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MHD56037 - Edition 5 25
SYMPTOM CAUSE REMEDY
Automatic Disc Brake:
Brake fails to release. Low air supply pressure. Ensure air pressure at inlet to disc brake is at least 50 psig (3.4 bar/340
kPa).
Leaking piston seals. Inspect brake breather. If air escapes from brake breather when attempting
to release brake, replace brake seals.
No release pressure at brake
port.
Check for proper operation of winch controls.
Sticking brake piston. Apply 50 psig (3.4 bar/340 kPa) to brake release port and check for brake
disc movement. (Brake discs can be viewed through brake breather hole.)
If brake discs do not move, disassemble and inspect disc brake as
described in “MAINTENANCE” section.