operators_manual

See How to Prepare the Axles for T
owing
on page 40
3. Connect the towing chain or cable
using best recovery practices .
See Best Practices for Recovery Rigging
on page 43
4. Make sure the recovered vehicle's
parking brakes are released. .
See Manually Release the Parking Brake
on page 37
5. 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 41
6. Follow state/provincial and local
laws that apply to vehicles in tow.
7. 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
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 malfunc-
tioning
brakes. If one of the brake cir-
cuits becomes inoperative, braking
distances will increase substantially
and handling characteristics while
braking will be affected. You could lose
control of your vehicle or cause an ac-
cident. Have it towed to the nearest
dealer or qualified repair facility for re-
pair. Failure to comply may result in
property damage, personal injury, or
death.
WARNING
DO NOT operate a vehicle when the
spring
brakes have been manually re-
leased. Driving a vehicle after its
spring brakes are manually released is
extremely dangerous. The brakes may
not function. Failure to comply may re-
sult in death, personal injury, equip-
ment or property damage.
EMERGENCY - How to Recover a Vehicle
Y53-6096-1C1 (09/20) 37
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