GEAR-PLNTY-YM 5235944 - Caterpillar

Pump Test (Chart B):
This test is used to find the efficiency of the hydraulic pump. Install a Blocking Assembly in the pressure line from the hydraulic pump. This prevents the oil from going through the system. All of the pump flow now goes through the flow meter.
Open the manual load valve on the flow meter fully before starting the diesel engine. The main relief valve is not a part of the circuit for the pump test. If the pressure gets too high, it is possible to cause injury to personnel or damage to equipment.
TEST 14: Pump Flow At Low Pressure (2400 RPM)1. Open the manual load valve fully.2. Start the diesel engine.3. Run the engine at 2400 rpm.4. Slowly close the manual load valve to get 100 psi pressure.5. Write down the oil temperature and the flow rate (gpm). TEST 15: Pump Flow At High Pressure (2400 RPM):1. Run the engine at 2400 rpm.2. Slowly close the load valve to get 1000 psi pressure.3. Write down the oil temperature and flow rate (gpm). TEST 16: Pump Flow At Low Pressure (1200 RPM):1. Run the engine at 1200 rpm.2. Open the load valve to get 100 psi pressure.3. Write down the oil temperature and the flow rate (gpm). TEST 17: Pump Flow At High Pressure (1200 RPM):1. Run the engine at 1200 rpm.2. Slowly close the load valve to get 1000 psi pressure.3. Write down the oil temperature and flow rate (gpm).Make a comparison of the test data with the data on Chart B for the specific machine under test. The information on Chart B is the maximum allowable for best performance. Troubleshooting: PROBLEM: Percent of flow loss for Test 15 is 10% (15% on D3) or MORE; for Tests 4 through 9 it is 15% (20% on D3) or MORE. PROBABLE REASON:A. Pump is worn and there is leakage in the control valve and/or cylinders. RECOMMENDATION FOR ACTION:A. Install a new or rebuilt pump.B. Do the Blocked Cylinders Tests to find the leakage rate in the control valve and/or cylinders. PROBLEM: Percent of flow loss for Test 15 is 0 to 10% (15% on D3); for Tests 4 through 9 it is 15% (20% on D3) or MORE. PROBABLE REASON:A. Pump is in good condition, but there is leakage in the control valve and/or cylinders. RECOMMENDATION FOR ACTION:A. Do the Blocked Cylinders Tests to find the leakage rate in the control valve and/or cylinders. PROBLEM: The percent of flow loss for Test 15 is 10% (15% on D3) or MORE. Flow differential for Test 17 is higher than the flow differential for Test 15 by more than