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3. TROUBLESHOOTING
1)
BRAKE LEAKS ACTUATION FLUID
Condition
Internal leak : Fluid
bypasses seals into axle
and fills axle with fluid
and blows out breather
or empties brake fluid
reservoir.
External leak
2)
BRAKE NOISE AND VIBRATION
Condition
Brakes product noise,
chatter, vibration.
P
P
ossible cause
1. Worn or damaged piston seal.
2. Melted or extruded piston seals.
3. Corrosion, pitting, wear or other
damage, marks, scratches to
piston and/or brake housing bore
in area of seal/sealing lips.
1. Loose bleeder screw.
2. Loose inlet fitting or plugs.
3. Damaged inlet fitting or plugs or
damaged seats.
Possible cause
Incorrect axle fluid and/or friction
material used.
1. Replace piston seals.
2. Correct cause of overheating and replace
seals.
3. Clean, smooth, rework or replace affected
parts.
1. Tighten bleeder screw to 2.0~2.7kgf m(15-20 lb-ft)
2. Tighten inlet fitting to 3.4~4.8kgf m(25-35 lb-ft)
3. Replace inlet fitting or plug and O-ring if used.
1. Use only meritor specified or approved
materials.
2. Drain and flush fluid from axle. Replace with
approved fluid.
3. Replace all friction discs. Thoroughly clean or
replace stationary discs.
3-54
Correction
Correction
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