LINES GP-AIR CONDITIONER 3844192 - Caterpillar

Illustration 3 g01623868
Tooling group "B"
198-4240 Digital Pressure Indicator Gp
Table 3
Tool Item Part Number Description Qty
B 198-4240 Digital Pressure Indicator Gp
- B1 198-4234 Indicator 1
B2 198-4239 Pressure Sensor 41,368 kPa (6,000 psi) 2
B3 198-4236 Extension Cable 2 Machine Preparation
The following procedures must be completed before performing the calibration.
Set the pilot pressure to the specifications in Testing and Adjusting, "Relief Valve (Pilot) - Test and Adjust" for the machine.
Calibrate the power shift pressure. Refer to Testing and Adjusting, "Solenoid Valve (Proportional Reducing) - Calibrate (Power Shift Pressure)" for the machine.
Calibrate the attachment valves. Refer to Testing and Adjusting, "Solenoid Valve (Proportional Reducing) - Calibrate (Attachment Valves)" for the Tool Control System.
Calibrate the flow limit valves. Refer to Testing and Adjusting, "Solenoid Valve (Proportional Reducing) - Calibrate (Flow Limit Valves)" for the Tool Control System.
Position the machine on level ground and stop the engine.
Illustration 4 g02276513
Stop valves for high-pressure oil delivery to the work tool (typical example)
Close the stop valves that are mounted on each side of the stick in order to prevent oil flow to the work tool during this procedure.
Release the pressure in the hydraulic system. Refer to Testing and Adjusting, "System Pressure - Release" for the machine.
Illustration 5 g03055087
Pump compartment (typical example)
(1) Pressure tap (delivery pressure for drive pump)
(2) Pressure tap (delivery pressure for idler pump)
Attach both 41,368 kPa (6,000 psi) pressure sensors to pressure tap (1) and pressure tap (2). Test Procedure
Start the engine.
Select a work tool one pump flow or two pump flow. Refer to Table 1 for the specifications for each setting. Refer to Testing and Adjusting, "Work Tool - Select" for the Tool Control System.
Place the machine controls at the following settings: engine speed dial "10" and AEC switch OFF. Refer to Testing and Adjusting, "Engine Performance - Test (Engine Speed)" for engine rpm settings.
Increase the hydraulic oil temperature to 50° 10°C (122° 18°F).
Illustration 6 g03082697
Control Inputs for attachment control valves EXTEND
(HP) Hydraulic foot pedal
(A) Pedal (Forward)
Operate the control input in the appropriate direction in order to relieve the valve. Note: A continuous relief of the valve for more than 10 seconds is not allowed.
Check the relief valve pressure setting at pressure tap (1) or pressure tap (2). Refer to Table 1 for the pressure specifications of the tool relief valve.
Return the control input to the NEUTRAL position. Adjustment Procedure
Attachment Control Valves Extend
Table 4
Attachment Control Valve Extend
Engine speed Speed Dial "10"
AEC switch OFF
Relief pressure setting One Pump Flow 20000 to 22000 kPa (2901 to 3191 psi)
Two Pump Flow 19000 to 23000 kPa (2756 to 3336 psi)
Torque for locknut 27 1.5 N m (19.9 1.1 lb ft)
Illustration 7 g03055117
Tool relief valve located above the boom foot (typical example)
To adjust the tool relief valve pressure setting, operate the control input for extension of the attachment control valves to the FULL position and hold. Refer to Illustration 6 for the control input.
Check the pressure reading at pressure tap (1) or (2) depending on pump flow setting.
Return the control input to the