LAMP GP-SIGNAL 1G4643 - Caterpillar

Personal injury or death can result from escaping fluid under pressure.Escaping fluid under pressure, even a very small pin-hole size leak, can penetrate body tissue and cause serious injury and possible death. If fluid is injected into your skin, it must be treated immediately by a doctor familiar with this type of injury.Always use a board or cardboard when checking for a leak.
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting, and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.Refer to Special Publication, NENG2500, "Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Cat products.Dispose of all fluids according to local regulations and mandates.
Specifications
Table 1
950K and 962K Steering    
Date     Equipment ID Code    
Pump Pressure     Setting     Actual    
Relief Valve Steering Cylinder Crossover    
25600 700 kPa (3713 102 psi)        
Illustration 1 g02700358
Steering valve HMU right side view.
Illustration 2 g02700360
Steering valve Command Control Steering right side view.
Table 2
950K and 962K Torque Specifications    
Callout     Torque    
Locknut (1) Relief Valve Steering Cylinder Crossover    
60 6 N m (44 4 lb ft)    
Locknut (3) Relief Valve Steering Cylinder Crossover Adjustment Screw    
12 1 N m (106 9 lb in)    Introduction
This information includes the following test:
Relief Valve (Steering Cylinder Crossover)This information includes the following adjustment procedure:
Adjustment Procedure Relief Valve (Steering Cylinder Crossover)Test Preparation
Refer to Testing and Adjusting, "Machine Preparation for Troubleshooting".Refer to Testing and Adjusting, "System Pressure Release".
Illustration 3 g02699498
Move steering frame lock to the LOCKED position.
Engage the parking brake. Move the transmission direction selector to the NEUTRAL position.Test Procedure
Illustration 4 g02700458
Steering valve HMU
Illustration 5 g02700459
Steering valve Command Control Steering
Remove the steering cylinder crossover relief valve (2). The steering cylinder crossover relief valve is located in the steering control valve. The steering cylinder crossover relief valve needs to be bench tested. Loosen locknut (1) and remove the valve.
The pressure of the relief valve should be 25600 700 kPa (3713 102 psi). Adjustment Procedure (Relief Valve Steering Cylinder Crossover)
Adjust the valve pressure, if necessary. Loosen the locknut (3). Turn the adjustment screw (4) counterclockwise in order to lower the pressure of the valve. Turn the adjustment screw (4) clockwise in order to increase the pressure of the valve. Tighten locknut (3) after the correct pressure is reached. The valve is faulty if the adjustment screw does not affect the pressure. Replace the valve.
Install the relief valve into the steering control valve. The valve should be installed with a torque of 60 6 N m (44 4 lb ft).