Bendix Commercial Vehicle Systems 16 1/2 SCAM/XTRA LIFE SERV MANUAL - Manual (Page 12)

10
PREVENTATIVE MAINTENANCE
A A A A A
A. A. A. A. A. Released Position
B. B. B. B. B. Applied Postion
B BB B B
MEASURING PUSH ROD STROKE
1.
1. 1. 1. 1. Measure the distance between the air chamber
mounting face and the center of the clevis pin,
with brakes released.
2. 2. 2. 2. 2. Make an 70-90 PSI application and hold it.
Measure the distance between the air chamber and
the mounting face and the center of the clevis pin.
3. 3. 3. 3. 3. Subtract measurement A from measurement B. If
this measurement equals or exceeds the maximum
readjust stroke the brakes need to be adjusted.
See F
See F See F See F See Figur igur igur igur igure 3. e 3. e 3. e 3. e 3.
4. 4. 4. 4. 4. If adjustment is required, spin the wheel slowly and
adjust the slack adjuster just enough for wheel to
spin freely. Be sure to adjust brakes equally on
each axle.
5. 5. 5. 5. 5. Apply and release brakes and observe slack
adjusters. Both slacks on each axle should respond
rapidly and in unison during application and
release.
6. 6. 6. 6. 6. Drive vehicle at a low speed in a safe area and
check for brake effectiveness prior to putting back
in service.
F F F F Figur igur igur igur igure 3 e 3 e 3 e 3 e 3
BRAKE LUBRICTION
Lubricate the camshaft thru the grease fitting on the
camshaft bracket with the chassis lube specified by the
vehicle manufacturer. Lube once every six months or at
every chassis lubrication.
BRAKE RELINE
The life of the brake lining is dependent on many factors
such as the material of the lining, type of operation the
vehicle is used for, geographic terrain, maintenance
practice of the shop, and the driver of the vehicle. If
driving conditions require frequent braking, lining
replacement will be required more often.
FOR RIVET LINING
Reline when thickness of lining is 1/4 " at thinnest
point, or 1/16" above rivet head.
FOR CAST SHOES WITH BOLTED LININGS
Reline when lining is below wear indicator line or
thickness is .31" at the thinnest point or 1/16" above
bolt head.
BRAKE OVERHAUL
As often as necessary to maintain satisfactory brake
performance. When overhauling the brakes, provide equal
service to both the left and right side of an axle.