operators_manual

the Best Practices for Recovery
Rigging? on page 45.
5. Make sure the recovered vehicle's
parking brakes are released. See
Manually Release the Parking
Brake on page 38.
6. If you desire to use the recovered
vehicle’s brakes, ensure that the
vehicle’s air system is connected to
that of the recovery vehicle. Ensure
that any air line that has been
removed from a driver-controlled
main differential lock is firmly
capped to prevent loss of air
pressure from the recovery vehicle if
it is supplying air pressure. If you
don’t desire to use the recovered
vehicle’s brakes, ensure that you
cage the spring brakes before
attempting to move the vehicle, see
How to Manually Lock a Differential
on page 42.
7. Follow state/provincial and local
laws that apply to vehicles in tow.
8. Do not tow vehicles at speeds in
excess of 55 mph (90 km/h).
For additional information concerning
heavy duty truck recovery, refer to the
following Technology & Maintenance
Council (TMC) literature.
• Recommended Practice #602–A —
“Front Towing Devices For Trucks
and Tractors.”
• Recommended Practice #602–B —
“Recovery Attachment Points For
Trucks, Tractors, and Combination
Vehicles
• Recommended Practice #626 —
“Heavy Duty Truck Towing
Procedures.”
Copies of these can be obtained from the
following address: Technology &
Maintenance Council 950 N. Glebe Road
[phone] Arlington, VA 22203 Email:
[e-mail] Website: http://
tmc.truckline.com
Manually Release the Parking
Brake
Recovering a vehicle may require the
parking brakes to be released. There may
be times when there is not enough air
pressure, or the engine's air compressor is
not able to produce enough pressure, to
release the parking brakes. In such cases,
the parking brakes (or Spring Brakes) can
be manually released.
WARNING!
Do not drive vehicle with malfunctioning
brakes. If one of the brake circuits should
become inoperative, braking distances will
increase substantially and handling charac-
teristics while braking will be affected. You
could lose control of your vehicle or cause
an accident. Have it towed to the nearest
dealer or qualified repair facility for repair.
Failure to comply may result in death, per-
sonal injury, equipment or property damage.
WARNING!
Do not operate a vehicle when the spring
brakes have been manually released. Driv-
ing a vehicle after its spring brakes are man-
ually released is extremely dangerous. The
brakes may not function. Failure to comply
may result in death, personal injury, equip-
ment or property damage.
EMERGENCY - How to Recover a Vehicle
38 Y53-6096-1A1 (01/17)
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