Towing Preparation: Air Parking Brakes; Towing Preparation: Hydraulic-Powered Parking; Brakes - IC Bus CE Series Operation And Maintenance Manual

Before moving the towed vehicle, check for adequate road
clearance of vehicle components.
unloading the towed vehicle prior to towing to reduce any
abnormal loads to the vehicle components resulting from the
towing procedures. Before towing, be sure to fully release the
parking brake, in either Air or Hydraulic brake system.

Towing Preparation: Air Parking Brakes

The spring actuated type parking brake can be released by
recharging the air system with at least 64 psi (441 kPa) of air. If
brake system does not retain air pressure, then manually cage
the spring brakes.
Towing Preparation: Hydraulic-Powered Parking Brakes
If battery power is available:
1. Place the transmission in "N" (Neutral) and turn the
ignition switch to the ON position.
2. While depressing the brake pedal, push and hold the
Parking Brake knob to release the parking brake.
If battery power has been lost, the Parking Brake cable will have
to be disconnected by following the steps below (see illustration):
CAUTION
To prevent vehicle and / or component damage,
while removing the parking brake cable, only the
threaded rod should rotate. If the cable is to be
reused, do not allow the cable to twist during
removal.
IC Bus recommends
Parking Brake Cable Assembly
1. 16mm Jam Nut
2. SAHR Canister Shaft 15mm
3. Adjustment Indicator, 'HASH' Mark
4. Threaded Rod 8mm
1. Install wheel chocks, place the transmission in "N"
(Neutral), and turn the ignition switch to the OFF
position.
2. While using a 15 mm wrench to hold the SAHR canister
shaft, loosen the jam nut on the threaded rod with a 16
mm wrench.
3. While using the 15 mm wrench to hold the canister
shaft, unscrew the threaded rod using an 8 mm wrench.
The rod must be unscrewed approximately 6 cm (2.5
in) before the cable disconnects. The cable will exhibit
some resistance while being unscrewed because it is
under tension.
Roadside Emergencies
147