COUNTERWEIGHT & MOUNTING GP 3077981 - Caterpillar

Table 1
980L Auxiliary Pressure Limiter
Date Equipment ID Code
Pump Pressure Setting Actual
Auxiliary Pressure Limiter.
Pressure at tap (1) during stall 22,080 800 kPa (3,202 116 psi)
Table 2
980L Torque Specifications
Callout Torque
Locknut (2) 17 3 N m (150 27 lb in) Introduction
The auxiliary attachment exists as a third function valve for the 980L. The auxiliary lines should be stalled for this test. This procedure does not account for the various work tools that exist.This information includes the following test:
Auxiliary PressuresThis information includes the following adjustment procedure:
Adjustment ProcedureRequired Tools
Illustration 1 g03630357
Tooling (A) 198-4240 Digital Pressure Indicator Gp
Table 3
Tool Item Qty Part Number Description
A 198-4240 Digital Pressure Indicator Gp
A1 1 198-4234 Digital Indicator
A2 1 198-4237 Pressure Sensor Gp
(0 to 3,445 kPa (0 to 500 psi))
A2 1 198-4238(1) Pressure Sensor Gp
(0 to 34,450 kPa (0 to 5,000 psi))
A3 1 198-4236 Adapter Cable As
(1) This sensor must be purchased separately. The sensor is not included in the 198-4240 Digital Pressure Indicator GpTest Preparation
Refer to Testing and Adjusting, "Machine Preparation for Troubleshooting".Refer to Testing and Adjusting, "System Pressure Release".
Illustration 2 g06097374
Steering Frame Lock in the LOCKED Position
Move steering frame lock to the LOCKED position.
Prepare the machine for testing by completing the procedure that is specified in the Service Manual module Testing and Adjusting, "Machine Preparation for Troubleshooting" for the machine that is being serviced.Test Procedure
Illustration 3 g06098455
Implement pump discharge pressure tap is located in the articulated hitch on the right side of the machine
(1) Implement pump discharge pressure tap.
Attach a pressure gauge that can sustain pressures up to 34,450 kPa (5,000 psi) to the implement pump discharge pressure tap (1).
Start the machine.
Turn off the Ride Control for the machine.
Increase the engine speed to high idle.
Stall the third function lever in the forward position. The pressure should read 22,080 800 kPa (3,202 116 psi).
Stall the third function lever in the rearward position. The pressure should read 22,080 800 kPa (3,202 116 psi).
If the pressures are correct, turn off the machine, release the pressure to the hydraulics to disconnect the pressure gauge. See the next section if adjustments are needed.Adjustment Procedure
Illustration 4 g06098514
Auxiliary valve located in the front of the machine
(2) Locknut
(3) Third function auxiliary pressure limiter
Turn off machine.
Locate the auxiliary valve. The best way to access the valve is up through the front of the machine with the lift arms RAISED and secure. Locate the auxiliary pressure limiter. See Illustration 4.
Loosen locknut (2) and use an internal hex wrench to adjust the pressure. Turn the adjuster screw clockwise in order to increase the pressure setting. Turn the adjuster screw counterclockwise in order to decrease the pressure setting.Note: The last movement should be clockwise before securing the locknut.
Tighten locknut (2) to 17 3 N m (150 27 lb in).
After adjustment, the check procedure shall be repeated.