OPERATIONAL PERFORMANCE TEST / Component Test Pilot Characteristics Summary: Main pump performance is checked by measuring the pump flow rate by using a hydraulic tester in- stalled at the main pump delivery port (one side) to be measured. Use Dr. ZX and a pressure gauge at the same time. IMPORTANT: This measurement procedure is a simple method. The measured data will be lower by approx. 5 % than the accurately measured value. In order to measure accurately, disconnect the return circuit from the control valve and connect it to the hydraulic oil tank. 5. Install hose (19) and adapter (20) to port T of pressure reducing valve (16). Remove plug L from the return pipe. Install hose (19). :
19 mm, 22 mm 6. Remove pipe (21) from the regulator. Install plug (G 1/4) to the mounting hole for pipe (21) in the regulator. : 17 mm 7. Remove the vacuum pump. Loosen the plug from top of the pump casing. Bleed air from the pump casing until oil only comes out. 8. Fully open the loading valve of hydraulic tester. 9. Start the engine. Check the connections for any oil leaks. Preparation: 1. While referring to steps 1 to 4 on page T4-5-18. Install a hydraulic tester to the main pump to be measured. 2. Remove the hose from regulator port Pi of the pump to be measured. Install plug (ST 6213) to the removed hose. : 6 mm, 19 mm 3. Install adapters (15) (3 used) to pressure reducing valve (16).
Remove plug M from the pilot filter. Install adapter (13) and hose (14) to the pilot filter. Install hose (14) to regulator port P1 on pressure reducing valve (16). : 19 mm 4. Install tee (17) to port P2 of pressure reducing valve (16). Install pressure gauge (18) and hose (14) to tee (17). Install hose (14) to the regulator. : 19 mm T4-5-20