6C–18 ENGINE FUEL
Injection Pump Calibration Data
Test Conditions
Injection nozzle ZEXEL No. 105780-0000
Injection nozzle holder ZEXEL No. 105780-2080
Injection starting pressure 17.2 MPa
Injection line dimensions Inside diameter = 3 mm
Outside diameter = 8 mm
Length = 600 mm
Transfer pump pressure 255 kPa
Test diesel fuel ISO4113 or SAE standard test oil (SAEJ967d)
Fuel temperature 39 – 41°C (109.2 – 114.8°F)
Pump rotation Clockwise viewed from the drive side
Overflow valve opening pressure 255 kPa (2.6 kg/cm
2
/ 37.0 psi)
Pre-stroke 2.9 ± 0.03 mm (0.114 ± 0.001 in.)
Injection order 1 – 5 – 3 – 6 – 2 – 4
Plungers are numbered from the drive side.
Tappet clearance Manually rotate the camshaft several times to make
sure that it rotates smoothly.
CAUTION:
Strictly observe the above test conditions during injection pump fuel injection volume adjustment.
Failure to observe the test conditions will result in misadjustment of the injection pump fuel injection volume.
Misadjustment of the fuel injection volume will result in serious engine damage.
Injection Timing
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