Yale ERP15-20VT Service Manual page 30

Parking Brake
The parking brake consists of two identical spring-ap-
plied, electrically-released brakes mounted directly to
the drive motors. The controller breaks the power sup-
ply to the brake coils, engaging the parking brake when
the truck is stopped. Pressing the emergency discon-
nect will apply the parking brake immediately in any
mode of operation. The parking brakes may be re-
leased for towing by removing the floor plate from the
operator compartment and pulling the manual release
lever. This lever and cable assembly manually releases
the parking brakes for towing. The following procedures
detail the repair procedures for the lever and cable as-
sembly and removal and installation procedures for the
parking brakes.
MANUAL RELEASE LEVER
Adjust Cable
The manual release mechanism should be adjusted so
that the brake is fully engaged when the lever is down,
but is fully released when the lever has been pulled up.
CAUTION
If the cable is adjusted too tight, damage to the
cable may occur when the manual release lever is
used. Make sure the cable is adjusted so there is 2
to 4 mm (0.08 to 0.16 in.) extra travel available be-
tween the parking brake actuators when the manual
release lever is UP.
1. Check the adjustment of the manual release lever
by placing the lever in the UP position and checking
the tension on the parking brake actuators. See
Figure 12.
2. If the parking brake actuators have more than 2
to 4 mm (0.08 to 0.16 in.) of free travel available,
adjust the nuts to tighten the cable and check free
travel again.
3. If the parking brake actuators have less than 2 to
4 mm (0.08 to 0.16 in.) of free travel, adjust the
nuts to loosen cable and check free travel again.
4. When the adjustment is within specification, tighten
the nuts, lower the manual release lever and test for
proper operation.
10
Parking Brake
1. MANUAL RELEASE LEVER
2. CABLE
3. NUTS
4. PARKING BRAKE ACTUATORS
5. TRACTION MOTOR (LEFT)
6. PARKING BRAKE ASSEMBLIES
7. TRACTION MOTOR (RIGHT)
Figure 12. Manual Release Components
Replace Cable
1. Remove the floor mat and floor plates. The manual
release lever must be in the down position.
2. Loosen the hardware securing the cable in place.
3. Press the parking brake actuators together so the
cable can be removed from the parking brake actu-
ators.
4. Disconnect the cable from the manual release lever.
5. Install the new cable to the manual release lever.
6. Secure the cable in position with hardware as re-
moved.
7. Press the parking brake actuators together and in-
stall the cable to the parking brake actuators.
1800 YRM 1332