Wacker Neuson RD 12A Repair Manual

RD 12/RD 12A Steering System
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7.2 Troubleshooting the Steering System
Background Low hydraulic pressure in the steering circuit can be the result of a defective or
worn steering valve or poor seals in the steering cylinder.
A badly worn exciter pump will affect both the steering and the vibration circuits
because these circuits operate in series using the same supply.
Note: In some cases the exciter pump may function well enough to operate the steering
circuit but not the vibration circuit. This is due to the much lower pressure requirements of
the steering circuit.
Procedure Follow the procedure below to check the steering system.
1. Remove the steering valve from the machine. See section
Removing the Stee-
ring Valve
.
2. Cap the hydraulic lines that feed the steering valve.
3. Start the engine.
4. Check the steering circuit relief pressure.
The steering system has now been checked.
WARNING! There is no steering control with the steering valve removed.
f DO NOT drive the machine with the steering cylinder disconnected or inoperative!
If Then
Hydraulic pressure remains low Problem is in the steering valve
Hydraulic pressure increases Problem is in the steering cylinder

Wacker Neuson RD 12A Specifications

General

Brand	Wacker Neuson
Model	RD 12A
Category	Utility Vehicle
Language	English