SERVICE REPAIR
E45Z E50Z E55Z E60Z E65Z [G108]
1600 SRM 1054
General
General
Figure 1. Power Steering Components (Typical)
1
Description
1600 SRM 1054
Legend for Figure 1
1. TO STEERING CONTROL UNIT
2. METAL BAND (HOLDS PUMP MOTOR TO
MOUNTING WELDMENT)
3. FROM HYDRAULIC TANK
4. PUMP MOTOR
5. STEERING PUMP
6. STEERING CYLINDER
7. RETURN TO HYDRAULIC TANK
8. PRESSURE CHECK FITTING
9. RUBBER CHANNELS
10. MOUNTING BRACKETS
11. CAPSCREW
12. WASHER
13. MOUNTING WELDMENT
This section covers the description, disassembly, as-
sembly, checks, adjustments, and troubleshooting of
the steering system. See Figure 1. There is a de-
scription for each part of the steering system at the
beginning of each repair section. See the Steering
Axle SRM for your vehicle for the description and
repair procedures for the steering cylinder.
Description
The steering system used on this lift truck is a
hydraulic system that does not have a mechanical
connection between the steering wheel and steer-
ing axle. The control of the steering is through a
hydraulic circuit. See Figure 1 and Figure 2. An
electric motor drives a hydraulic pump. To energize
the motor, the key switch must be ON and the seat
switch must be closed. After the starting sequence is
completed, the electric motor on the Power Steering
pump will run continuously at low speed. As the
wheel is turned, the electric motor will increase
its speed to meet the steering demand. When the
electric motor operates the pump, hydraulic oil flows
through the power steering system.
As the steering wheel is moved to steer the lift
truck, the steering sensor detects the movement
of the steering shaft. The steering sensor sends a
signal to the motor to increase or decrease the motor
speed proportional to the speed that the steering
wheel is turned. For more information, see the
section Electrical Diagrams, AC Motor Con-
trol System 8000 SRM 1225 for lift truck models
J2.00-3.20XM (J40-65Z) (B416), andElectrical Dia-
gram