PLATE 2662782 - Caterpillar

Table 1
Required Tools    
Part Number    Part Description    Qty    
8T-0861     Pressure Gauge     1    
6V-3989     Unvalved Nipple     1    
6V-4143     Coupler Assembly     2    
6V-3014     Hose     1    
4C-9910     Portable Hydraulic Tester     1    
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, "Caterpillar Tools and Shop Products Guide" for tools and supplies suitable to collect and contain fluids on Caterpillar products.Dispose of all fluids according to local regulations and mandates.
Illustration 1 g00294200
The pressure tap is located in the battery compartment. (1) Load sensing signal pressure
Illustration 2 g00662882
(2) Cap (3) Locknut (4) Hammer valve (5) Plate (6) Locknut (7) Cap
Connect a 60000 kPa (8600 psi) pressure gauge to pressure tap (1) .
Install 4C-9910 Portable Hydraulic Tester between both of the hammer lines at the end of the stick.
To prevent personal injury or equipment damage from failure of the hydraulic test equipment or associated circuit components because of blocked pump flow, make sure that the test equipment valves are fully open before starting the engine.
To prevent personal injury and/or equipment damage from failed lines or components while the hydraulic test equipment is returned to the open flow position, slowly open the hydraulic test equipment valve while monitoring the pump flow.If pump flow does not increase as the valve is opened, shut the engine off and determine what is preventing the pump from upstroking.
Start the engine.
Place the engine speed at the HIGH IDLE position.
Remove cap (2) .
Loosen locknut (3) .
Turn the adjustment screw clockwise until the screw contacts the stop.Oil Flow Adjustment
Remove cap (7) .
Loosen locknut (6) .
Lower the left console.
Operate the hammer pedal in order to build pressure in the hydraulic circuit.
Check the oil flow to the hammer. If necessary, increase the oil flow or decrease the oil flow.Note: The specifications for the pressure, the flow rate, and the engine rpm may vary with attachment types and/or suppliers. It is very important to follow the specifications of the supplier. Failure to follow the specifications of the supplier could result in poor performance of the attachment.Note: Turn the adjustment screw that is inside of locknut (6) counterclockwise in order to increase the oil flow. Turn the adjustment screw clockwise in order to decrease the oil flow.
When the flow is adjusted, hold the adjustment screw in place while locknut (6) is tightened.
Install cap (7) .Line Relief Valve Adjustment
Close the ball valve at the end of the hammer lines. This will allow pressure to build up when the hammer is operated.
Lower the left console.
Operate the hammer pedal in order to build pressure in the hydraulic circuit.
Adjust the hammer relief valve to 22000 kPa (3190 psi) by turning the adjustment screw that is inside of locknut (3) counterclockwise.Note: Make the final