3-24
F-691-0913 Edition
OPERATING INSTRUCTIONS
CAUTION
Malfunction in the ABS is signaled by illumination of the
ABS warning lamp located at the left rear side of the
semitrailer. The warning lamp will come on and stay on
while power is supplied to the ABS on a moving vehicle, if
there is a fault. If a fault in the ABS exists, normal braking
will still occur, but wheels may lock. The semitrailer is still
operable, but the system should be serviced as soon as
possible.
CAUTION
Refer to ABS maintenance manual supplied with
semitrailer to answer basic questions for the anti-lock
brake system, obtain outline procedures on how to
adjust, test, remove, and install ABS components, as well
as how to test for faults in the system by using “Blink
Code Diagnostics”; and illustrates ABS components,
wiring, and plumbing installation diagrams.
Cold Weather Operation
1.
Cold weather causes lubricants to congeal, insulation
and rubber parts to become hard, which may lead to
problems found in bearings, electrical systems, and
air systems. Moisture attracted by warm parts can
condense, collect and freeze to immobilize
equipment. The truck/semitrailer operator must
always be alert for indicators of cold weather
malfunctions.
2.
During any extended stop period, neither the service
nor parking brake should be used as they can freeze
up. Use wheel chocks to secure the vehicle from
moving.
3.
Check all structural fasteners, air system fittings,
gaskets, seals and bearings for looseness that can
develop due to contraction with cold. Do not
over-tighten.
4.
Check tire inflation. Tire inflation decreases when the
temperature decreases.
5.
Periodically check drain holes in the bottom of the
relay valve (for trailers with air brakes) and storage
compartments. They must be open at all times to
avoid moisture entrapment.
The auxiliary (blue) circuit is for powering the
semitrailer ABS. This circuit must be hot when
the tractor key switch is on. No other electrical
devices may be powered by this circuit while the
semitrailer is moving forward.
If a fault exists in the semitrailer ABS, normal
braking will occur, but wheels may lock. Service
the ABS as soon as possible.
Summary of Contents for 825D Series
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Page 6: ...iv F 691 0913 Edition...
Page 14: ...2 6 F 691 0913 Edition STANDARD SPECIFICATIONS...
Page 40: ...3 26 F 691 0913 Edition OPERATING INSTRUCTIONS Page Intentionally Blank...
Page 60: ...4 20 F 691 0913 Edition MAINTENANCE AND LUBRICATION Figure 4 13 Axle and Brake Assembly...
Page 77: ...TROUBLESHOOTING GUIDE 5 9 Notes...
Page 78: ...5 10 F 691 0913 Edition TROUBLESHOOTING GUIDE...
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