SERVICE REPAIR
W20ZR W30ZR [B455]
1600 SRM 962
Special Precautions
General
The control handle assembly is designed to perform
several functions. The standard control handle in-
cludes the speed/direction control and buttons for the
horn, traction reversing, and hydraulic functions.
The control handle is connected to the Master Drive
Unit (MDU) and is used to steer the truck as it turns
the MDU. Move the control handle left or right to
turn the drive/steer tire and steer the truck. Con-
trols mounted in the handle are linked to the control
panel by a wiring harness that passes through the
center of the handle. The brake is applied when the
handle is in the full up or down position.
The bottom-mounted control handle assembly is used
on the W60/65/80Z, W30/40ZA, W20/30ZR, and W25/
30/40ZC lift trucks. The handle is designed to be
used while the operator is walking beside the lift
truck. The top-mounted control handle assembly is
used on the B60/80Z lift trucks. This model is de-
signed to be used while the operator is either walk-
ing beside the truck or riding on a small platform to
the left or right side of the handle.
Special Precautions
WARNING
To avoid personal injury and prevent electri-
cal shock, perform the following steps before
troubleshooting or adjusting and before con-
necting or disconnecting a handset or personal
computer.
CAUTION
To avoid controller damage, always disconnect
the battery, discharge the capacitor, and never
put power to the controller while any power
wires are disconnected. Never short any con-
troller terminal or motor terminal to the bat-
tery. Make sure to use the proper procedure
when servicing the controller.
1. Turn key switch to OFF position and disconnect
the battery.
2. Discharge the capacitors in the controllers by
connecting a 200-ohm, 2-watt resistor across
the controller’s B+ and B terminals. DO NOT
short across the motor controller terminals with
a screwdriver or jumper wire. See Figure 1 a