User Manual

6. With a wrench, turn the release
stud assembly nut until the
compression spring is 90-95
percent caged. While doing this,
check to make sure the push rod
(adapter push rod or service push
rod) is retracting. DO NOT over-
torque the release stud assembly
.
(S-Cam-type maximum: 50 lb-ft (68
N·m), Wedge-type maximum: 30
lb-ft (41 N·m)). The spring brake is
now mechanically released.
How to Prepare the Axles for
T
owing
If the vehicle is going to be towed from the
front axle and using the rear axle for
support, then the axle shafts should be
prepared [removed] so that minimal
damage is made to the differential during
the towing process.
Ensure that the recovered vehicle does not
have an open air line. An open air line on
the recovered vehicle will cause a leak in
the air system of the recovery vehicle if
both vehicles’ brake systems are
connected. This could cause a loss of
system air
, which can cause the service
brakes not to function, resulting in the
sudden application of the spring brakes
causing wheel lock-up, loss of control, or
overtake by following vehicles.
WARNING
An open air line on the recovered vehi-
cle
will cause a leak in the air system
of the recovery vehicle if both vehicles’
brake systems are connected. This
could cause a loss of system air, which
can cause the service brakes not to
function, resulting in the sudden appli-
cation of the spring brakes causing
wheel lock-up, loss of control, or over-
take by following vehicles. You could
be in an accident involving personal in-
jury or death. Ensure that any air line
that has been removed from a driver-
controlled main differential lock is firm-
ly capped to prevent loss of air pres-
sure from the recovery vehicle if it is
supplying air pressure.
1. Lift driving wheels off the ground or
remove the driveline and axle
shafts before towing the vehicle.
EMERGENCY - How to Recover a Vehicle
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