Yanmar 4LHA-DTP, Operation Manual

Page: 409 / 670

Chapter 3 Fuel Injection Equipment
10. Test Bench Adjustment of VE Pump
10. Test Bench Adjustment of VE Pump
i 4LHA Series i
* For adjustment specifications, refer to the
individual test standards.
Adjustment conditions:
Nozzle
Nozzle holder
DKKC Part No.
105780-0000
(NP-DN12SD12T)
DKKC Part No.
105780-2080
(EF8511/9A)
Nozzle opening
pressure
Injection line
Test oil
Fuel oil temperature
(fuel tank)
Supply pressure
14.7MPa(150 kgf/cm
2
)
6 x 2 - 8 4 0 mm
SAE Standard Test Oil
(SEAJ967d) or ISO
4113 test oil
4 5
+ 5 o
C
0.02 MPa(0.2 kgf/cm
2
)
0~80°c
150kg/cm
2
(1) Pre-supply pump
(2) Filter
(3) Regulator valve inlet
(4) Accumulator
PI: Test oil inlet pressure 0-0.1MPa(0-1 kgf/cm
2
)
P2: Pump chamber pressure 0-1.47MPa(0-15 kgf/cm
2
)
P3: Positive & Negative pressure;
Positive: Boost compensator
0-0.2MPa(0-2 kgf/cm
2
)
Negative: Aneroid compensator
0-101kPa(0-76 cmHg)
(5) Nozzle opening pressure 14.7MPa
(150 kgf/cm
2
)
(6) Measuring cylinder for overflow fuel
volume
(7) Fuel tank
(8) Overflow valve
(9) Thermometer(fuel tank)
Fig. 23 TEST BENCH PIPING DIAGRAM FOR PUMP PERFORMANCE TEST
3-1-52