PLUNGER 9T4978 - Caterpillar

Test Procedure
Confirm the calibration using the following procedure and specifications. Refer to Table 3 for the load pressure and flow specifications.
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Select "Diagnostic Tests" from the "Diagnostics" menu.
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Highlight "Main Pump Flow Limitation Pressure Test" and click on the "Start" button in the lower left corner of the screen.
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Select the test and press the "Begin" button.
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Follow the instructions on the screen. Press "Start" button in the lower left corner to begin the test.
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Portable hydraulic tester (flow meter)
(5) Load valve
Set the main pump pressure using load valve (5) on the flow meter. Use the arrows to adjust the flow. Refer to Table 3 for the load pressures and flow specifications.
Table 3
"Solenoid Valve (Proportional Reducing) - Calibrate (Flow Limit Valves)"
Date Machine Serial Number
Machine Settings Engine Speed
Engine speed dial "10"
AEC switch OFF
Flow set using Diagnostic Tests with Cat ET Load pressure applied with flow meter
12000 kPa (1740 psi) 16000 kPa (2321 psi) 20000 kPa (2901 psi)
Flow Specifications
One Pump Flow 140 L/min (37.0 US gpm) 133 to 147 L/min (35.1 to 38.8 US gpm) 133 to 147 L/min (35.1 to 38.8 US gpm) 133 to 147 L/min (35.1 to 38.8 US gpm)
190 L/min (50.2 US gpm) 181 to 200 L/min (47.8 to 52.8 US gpm) 181 to 200 L/min (47.8 to 52.8 US gpm) 181 to 200 L/min (47.8 to 52.8 US gpm)
240 L/min (63.4 US gpm) 228 to 252 L/min (60.2 to 66.6 US gpm) 228 to 252 L/min (60.2 to 66.6 US gpm) 228 to 252 L/min (60.2 to 66.6 US gpm)
Two Pump Flow 200 L/min (52.8 US gpm) 190 to 210 L/min (50.2 to 55.5 US gpm) 190 to 210 L/min (50.2 to 55.5 US gpm) 190 to 210 L/min (50.2 to 55.5 US gpm)
250 L/min (66.0 US gpm) 237 to 263 L/min (62.6 to 69.5 US gpm) 237 to 263 L/min (62.6 to 69.5 US gpm) 237 to 263 L/min (62.6 to 69.5 US gpm)
300 L/min (79.3 US gpm) 285 to 315 L/min (75.3 to 83.2 US gpm) 285 to 315 L/min (75.3 to 83.2 US gpm) 285 to 315 L/min (75.3 to 83.2 US gpm)