Universal M-25XP - CHECKING FUEL TIGHTNESS OF DELIVERY VALVE OF FUEL INJECTION PUMP

CHECKING FUEL TIGHTNESS OF DELIVERY VALVE OF FUEL INJECTION PUMP
1. Set a pressure gauge to the pump.
2. Rotate the
flywheel to increase the pressure to 9.8 MPa (100 kgf/cm
2
,
1422 psi).
3. Align the plunger with the bottom dead center.
4. Measure the time needed to decrease the initial pressure.
5. If the measurement is less than allowable limit, replace the delivery valve. See engine
specifications.
Reference value
Allowable limit
1. Connector
2. Pressure
Sensor
10 seconds or more
5 seconds
Pressure gauge
construction
14.7 MPa (150 kgflcm
2
,
2133 psi) and
68.6
MPa (700 kgflcm
2
,
9954 psi)
3. Non-drying Adhesive
4. Weld Entire Circumference
5. Copper Packing
6. S45C Steel Tube
7. S45C Hexagonal Steel Tube
8. Injection Pipe
135
1710671
23(Q91)~
Unit: mm (in.)
(8)