LINES GP-WATER 4865185 - Caterpillar

Introduction
The charging valve creates a small amount of back pressure in the implement hydraulic system. The back pressure creates resistance as oil flows to the tank. This resistance ensures that oil will flow to the Quick-Drop valve rather than to the tank. The resistance will also prevent cylinders from voiding during rapid lowering by helping the makeup valves function.Required Tools
Illustration 1 g01127223
Tooling (A) ( 6V-7830 Pressure Gauge (Tetragauge))
Table 1
Required Tools    
Tooling    Item    Part
Number    Description    Qty    
A     A1     8T-0862     Pressure Gauge
500 kPa (72 psi)     1    
A2 8T-0860     Pressure Gauge
40000 kPa (5800 psi)     1    
A3 8T-0855     Pressure Gauge
4000 kPa (580 psi)     1    
A4 6V-3081     Hose As
41500 kPa (6020 psi)     1    
A5 4S-6399     Connector     1    
A6 6V-4144     Coupler     1    
B         110-6349     Fitting As     1    Test Procedure
Shut off the engine. Move all of the control levers in order to relieve the pressure in the system.
Illustration 2 g00698906
Install a 110-6349 Fitting As (B) and the 6V-7830 Pressure Gauge (A) at port (1) on the inlet manifold for the implement control valve. Clearance is limited when you are installing tetragauge (A) . Ensure that the gauge does not have additional adapters at the connector.Note: A tetragauge, or similar tooling must be used for this test. There is a pressure spike when the engine is started. If a small resolution gauge is connected directly to port (1) , the pressure spike will damage the gauge.
Start the engine and lower the blade until the lift cylinders are fully extended. The front of the machine will be lifted off the ground. Return the control valve to the HOLD position.
Shut off the engine.
Slowly move the bulldozer control lever to the RAISE position until movement begins. Record the reading on the pressure gauge. The pressure should be 1050 250 kPa (150 35 psi).Adjustment procedure
Shut off the engine. Move all of the control levers in order to relieve the pressure in the system.
Loosen the jam nut and use adjustment screw (2) to adjust the pressure setting of the valve. Turn the screw clockwise in order to increase the pressure and turn the screw counterclockwise in order to decrease the pressure.
Repeat the test procedure and the adjustment procedure until the value of 1050 250 kPa (150 35 psi) is read on the gauge. Tighten the jam nut and remove the gauge and the hose from port (1) .