Section 18: BODY
PA1562
71
2. Operate the engine when towing to maintain
brake system air pressure. If the engine
cannot be operated, connect an external air
pressure line from the tow truck to the
emergency fill valve in the engine compart-
ment.
3. The emergency fill valve in the front service
compartment does not supply air pressure
to the brake system. The air pressure must
be 75 psi (520 kPa) minimum, and the line
should be attached to the air line with a
clip-on chuck.
WARNING
Do not tow the vehicle without external air
pressure applied to the emergency fill valve if
the engine does not operate. Without brake
system air pressure, the brakes may apply
automatically if system air drops below 40 psi
(275 kPa). If failure prevents releasing the
parking brakes with air pressure, disengage
the parking brakes mechanically.
4. Lift the vehicle from under the front axle, and
adequately secure the underside to the tow
vehicle lifting attachment with chains.
5. Observe safety precautions when towing.
18.2 TOWING WITHOUT LIFTING
WARNING
When towing vehicle without lifting, use only a
tow truck with a solid link tow bar and related
equipment. All other means of towing are
unauthorized. Tow only from the front of the
vehicle.
1. Remove both drive axle shafts to prevent
damage to the transmission. Plug axle tube
to prevent oil loss. Refer to Arvin Meritor
"Maintenance Manual no.5" annexed at the
end of Section 11, Rear axle, in this manual
for correct procedure.
CAUTION
Transmission lubrication is inadequate when
towing. With automatic, semi-automatic or
manual transmission, the drive axle shafts
must be removed to avoid serious damage to
the transmission.
2. Operate the engine when towing to maintain
brake system air pressure. If the engine
cannot be operated, connect an external air
pressure line from the tow truck to the
emergency fill valve in the engine
compartment. The emergency fill valve in
the front service compartment does not
supply air pressure to the brake system. The
air pressure must be 75 psi (520 kPa)
minimum, and the line should be attached to
the air line with a clip-on chuck.
WARNING
Do not tow the vehicle without external air
pressure applied to the emergency fill valve if
the engine does not operate. Without brake
system air pressure, the brakes may apply
automatically if system air drops below 40 psi
(275 kPa). If failure prevents releasing the
parking brakes with air pressure, disengage
the parking brakes mechanically.
3. Position the tow truck so that the tow bar
contacts the front bumper of the vehicle.
4. Attach the tow truck chains only in the tow
eyes of the vehicle under the bumper and
take up all the slack.
5. Attach safety chains as applicable.
6. Observe safety precautions when towing.
FIGURE 54: TOW EYES 18401
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