SERVICE REPAIR
T7ZAC [B477]
1600 SRM 1031
Special Precautions
Introduction
GENERAL
This section provides a description of the steering
system used on the T5-7Z, T5-7ZAC, C60-80Z, and
C60-80ZAC lift trucks. Procedures for removal, dis-
assembly, repair, assembly, and installation of the
steering assembly are outlined in this section.
See the section Electrical System 2200 SRM 1052
or Electrical System 2200 SRM 1357 for informa-
tion on removal and disassembly of the control han-
dle.
See the section Master Drive Unit 630 SRM 961 for
information on the traction motor, drive unit, or drive
tire and wheel assembly.
See the section Periodic Maintenance 8000 SRM
1032 or Periodic Maintenance 8000 SRM 1368 for
instructions on removing and installing the Drive
Unit Compartment Covers.
DESCRIPTION OF OPERATION
The steering system consists of a top-mounted, fixed,
tower-type control handle assembly, a support as-
sembly, a steer plate, a Master Drive Unit (MDU),
and the drive tire and wheel assembly. The opera-
tor moves the control handle assembly left or right
to steer the truck. Direction and speed controls are
located on the control handle assembly which is at-
tached to the hub on the support assembly. The con-
trol handle assembly is adjustable. A spring-loaded
pin locks it into position. The support is attached
to the truck frame and houses a set of tapered roller
bearings. The hub is attached to the upper end of the
spindle. The steer plate connects the lower end of the
spindle to the MDU and turns the MDU left or right
when the control handle is moved to steer the truck.
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 p