MAULE AIRCRAFT CORPORATION
MAINTENANCE MANUAL
FOR
M-4/C/S/T
20
Rev. B
4/13/16
6.
Recheck reservoir level and fill as necessary.
MAINTENANCE HINTS ON HYDRAULIC BRAKES
:
Excessive pedal travel:
Probable cause Corrective Action
1. Normal wear of brake pad at wheel
1. If pad is worn thin, replace with new pad.
2. Leak in system
2. Inspect all attachments and fittings in brake
system.
3. Air in system
3. A springy, soft action of the pedal indicates
air in the system. An excessive amount of
air in system will allow the pedal to continue
traveling under normal pressure. In either
case, the system should be bled and refilled.
4. Lack of fluid in reservoir
4. Air will enter system if the reservoir runs dry.
Inspect at regular intervals and keep reser-
voir full at all times.
5. Vent plug stopped up
5. If vent hole in reservoir plug becomes
stopped, there is a possibility that a partial
vacuum will be created in the system, which
will interrupt the fluid flow in the system.
Clear vent hole.
6. Improper bleeding - air mixed with fluid 6. Bleed brakes.
7. Master cylinder cup or “O” ring wear
7. Replace brake cylinder cups and “O” rings.
8. Wheel cylinder leakage
8. Replace wheel cylinder seals.
DRAGGING BRAKES
:
NOTE: These disc brakes have no spring return of the pads and thus will always drag slight-
ly. Do not be concerned unless this drag is noticeable while taxiing.
Probable Cause
Corrective Action
1.
Foreign matter in system
1.
If dirt is found in the system, the master cyl-
inder and brake assemblies must be dis-
mantled and parts cleaned with alcohol and
reinstalled. Flush system and install new
brake fluid.
