65E, 75E, 85E and 95E Agricultural Tractors Caterpillar

Troubleshooting - Steering

Usage:

65E 1GM

There Is No Steering

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Table 1
There Is No Steering.
Cause	Solution
There is no pilot pressure.	Make sure that the steering column is connected to the steering control. Check for low charge pressure. Check the operation of the steering control. Make sure that the line between the steering pump and the steering control is not plugged.
There is excessive wear in the steering pump or in the steering motor.	Replace the steering pump or replace the steering motor.
The multifunction valves in the steering pump are malfunctioning.	Consult any CLAAS dealer.
The control for the pump stroke is malfunctioning.	Consult any CLAAS dealer.
The load on the steering system exceeds the capability of the steering system.	Reduce the load on the steering system. Set the drawbar and the three-point hitch for side-to-side movement. Raise the implement when you turn the machine.

The Turning Radius Is Unusually Wide

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Table 2
The Turning Radius Is Unusually Wide.
Cause	Solution
There is slippage between the belt and the drive wheel.	Mud between the belt and the drive wheel can cause slippage. Also, low belt tension can cause slippage between the belt and the drive wheel. You may damage the machine if you do not correct the problem immediately.
The pressure of the air spring is low.	Check the pressure of the air spring. As required, inflate the air spring to the correct pressure.
There is excessive wear in the steering pump or in the steering motor.	Replace the steering pump or replace the steering motor.
The charge pressure is low.	Low charge pressure can be caused by excessive wear in the steering pump, in the steering motor, or in the charge pump. Also, low charge pressure can be caused by leakage in the steering control or by a malfunctioning multifunction valve.
The output pressure from the steering control is low.	The steering control may be malfunctioning or the steering control may be misadjusted. Also, the charge pressure may be low. Low charge pressure can be caused by excessive wear in the steering pump, in the steering motor, or in the charge pump. Also, low charge pressure can be caused by leakage in the steering control or by a malfunctioning multifunction valve.
The multifunction valves in the steering pump are malfunctioning.	Consult any CLAAS dealer.
The control for the pump stroke is malfunctioning.	Consult any CLAAS dealer.
The relief pressure setting is low.	Consult any CLAAS dealer.
The load on the steering system exceeds the capability of the steering system.	Reduce the load on the steering system. Set the drawbar and the three-point hitch for side-to-side movement. Raise the implement when you turn the machine. Use a series of small, quick turns in order to turn the machine.

Steering Performance Is Poor in One Direction

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Table 3
Steering Performance Is Poor in One Direction.
Cause	Solution
There is slippage between the belt and the drive wheel.	Mud between the belt and the drive wheel can cause slippage. Also, low belt tension can cause slippage between the belt and the drive wheel. You may damage the machine if you do not correct the problem immediately.
The output pressure from the steering control is low.	The steering control may be malfunctioning or the steering control may be misadjusted. Also, the charge pressure may be low. Low charge pressure can be caused by excessive wear in the steering pump, in the steering motor, or in the charge pump. Also, low charge pressure can be caused by leakage in the steering control or by a malfunctioning multifunction valve.
There is excessive wear on the port plate in the steering motor or on the port plate in the steering pump.	Consult any CLAAS dealer.
The multifunction valves in the steering pump are malfunctioning.	Consult any CLAAS dealer.
The relief pressure setting is low.	Consult any CLAAS dealer.
The control for the pump stroke is malfunctioning.	Consult any CLAAS dealer.
The pilot line between the steering control and the steering pump is blocked.	Consult any CLAAS dealer.

Turns Are Jerky or Turns are Unstable

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Table 4
Turns Are Jerky or Turns Are Unstable.
Cause	Solution
The multifunction valves in the steering pump are malfunctioning.	Consult any CLAAS dealer.
The relief pressure setting is low.	Consult any CLAAS dealer.
The setting for the high pressure stall is low.	Consult any CLAAS dealer.
The pilot signal is fluctuating.	The steering control is unstable. Also, debris in the pilot lines may cause the valve to stick.
There is air in the pilot lines.	Consult any CLAAS dealer.

The Engine Lugs More Than Normal When You Steer The Machine

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Table 5
The Engine Lugs More Than Normal When You Steer The Machine.
Cause	Solution
The multifunction valves in the steering pump are malfunctioning.	Consult any CLAAS dealer.
The control for the pump stroke is malfunctioning.	Consult any CLAAS dealer.
The relief pressure setting is too low or the relief valve is malfunctioning.	Consult any CLAAS dealer.
The pressure in the air springs is too low.	Check the pressure for the air spring. As required, inflate the air spring to the correct pressure.
The steering pump is not stroking correctly.	Consult any CLAAS dealer.
You are losing torque in the final drive. Also, the final drive bearing may have failed or the final drive pinion may have failed.	Consult any CLAAS dealer.
The load on the steering system exceeds the capability of the steering system.	Reduce the load on the steering system. Set the drawbar and the three-point hitch for side-to-side movement. Raise the implement when you turn the machine. Use a series of small, quick turns in order to turn the machine.
The belt tension is too high due to packing of debris.	Remove the debris from the undercarriage.

Machine Drifts in One Direction in First Gear When the Engine is at Low Idle

Note: The maximum allowable drift is 1.8 m (6 ft) in 61 m (200 ft).

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Table 6
Cause	Solution
The track alignment is not correct.	Adjust the track alignment.
The belt tension is not correct.	Check the belt tension.
The pressure of the air springs are not equal.	Check the pressure of the air spring. As required, inflate the air spring to the correct pressure.
There is pilot pressure in NEUTRAL.	The steering control is not adjusted correctly. The pilot valve spool is stuck. The centering spring for the steering wheel is malfunctioning.
The multifunction valves in the steering pump are malfunctioning.	Consult any CLAAS dealer.
The control for the pump stroke is malfunctioning.	Consult any CLAAS dealer.
The load on the drawbar is off-center.	Remove the pin for the swinging drawbar.

The Steering Wheel Rotation Is Excessive Before the Turn Begins

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Table 7
The Steering Wheel Rotation Is Excessive Before the Turn Begins.
Cause	Solution
The multifunction valves in the steering pump are malfunctioning.	Consult any CLAAS dealer.
The steering control is not adjusted correctly. The steering control may be damaged.	Consult any CLAAS dealer.
The control for the pump stroke is malfunctioning.	Consult any CLAAS dealer.
The pilot valve in the steering control is not adjusted properly.	Consult any CLAAS dealer.
There is excessive wear in the steering pump, the steering control, or the steering motor.	Replace the steering pump, the steering control, or the steering motor.

The Temperature of the Hydraulic Oil in the Steering System Is High

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Table 8
The Temperature of the Hydraulic Oil in the Steering System Is High.
Cause	Solution
The oil cooler core is plugged or the air flow of the oil cooler core is low.	Clean debris from the oil cooler core.
The oil cooler bypass valve is stuck open.	Replace the valve.
You are using the incorrect oil viscosity.	Use the correct oil viscosity in the hydraulic system.
The oil level is low.	Check the hydraulic system oil level. If the level is low, add oil to the hydraulic system.
There is air in the oil.	Find the location of the entry of the air into the system. As required, repair components or replace components.
There is excessive wear in the steering pump or in the steering motor.	Replace the steering pump or replace the steering motor.
The multifunction valves in the steering pump are malfunctioning.	Consult any CLAAS dealer.
The control for the pump stroke is malfunctioning.	Consult any CLAAS dealer.
A line is restricted.	Consult any CLAAS dealer.
The load on the steering system exceeds the capability of the steering system.	Reduce the load on the steering system. Set the drawbar and the three-point hitch for side-to-side movement. Raise the implement when you turn the machine. Use a series of small, quick turns in order to turn the machine.
The charge pressure relief setting is too high.	Consult any CLAAS dealer.
The setting for the high pressure stall is high.	Consult any CLAAS dealer.
The high pressure cutoff setting is too high.	Consult any CLAAS dealer.

The Machine Turns in the Opposite Direction of the Steering Wheel in Forward and/or Reverse

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Table 9
The Machine Turns in the Opposite Direction of the Steering Wheel in FORWARD and/or REVERSE.
Cause	Solution
The diverter valve does not get the pilot signal when the machine is in REVERSE.	Consult any CLAAS dealer.
The oil lines between the steering control and the diverter valve are incorrectly connected.	Consult any CLAAS dealer.
The oil lines between the diverter valve and the steering pump are connected incorrectly.	Consult any CLAAS dealer.
The diverter valve is stuck open or the return spring is broken.	Consult any CLAAS dealer.
The pump discharge lines are interchanged.	Consult any CLAAS dealer.
There is an electrical fault in the solenoid.	Consult any CLAAS dealer.

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