Wacker Neuson 803 - Replacement of Fuel Injection Pump

SHB 803 en – Edition 2.4 * 803s410.fm 4-9
Engine
Replacement of fuel injection pump
☞Mark the initial position on the pump and wheel case housing before removing the fuel
injection pump – see Fig. 9
☞Remove gear casing cover 10/1 of the fuel injection pump
☞Mark the position of the gear of the fuel injection pump 11/A in relation to gear 11/B
☞Completely loosen lock nut 11/2 of the drive pinion
☞Remove the fuel injection pump
☞Read off the injection angle on the pump
☞Read off the injection angle on the new pump
➥Read off the imprint on the engine side of the fuel injection pump
☞Difference of “Angle of new pump” – “Angle of old pump” gives you the mounting angle
of the new fuel injection pump
➥Positive value: later injection time (toward the engine)
➥Negative value: earlier injection time (away from the engine)
☞Install the new fuel injection pump
☞Check the marked position of the drive pinion of the fuel injection pump (fig. Fig. 11)
☞Screw on and tighten nut 11/2
☞Check injection time
☞Install gear casing cover 10/1 of the fuel injection pump
Notice!
Do not loosen screws 11/3 of the drive pinion of the fuel injection pump. These screws
specify the precision setting of the fuel injection pump set by the manufacturer!
Fig. 9: Correction of injection angle
Mark on pump housing
Labels
Example: +1°
Example: +0.25°
Fig. 10: Gear casing cover
1
Fig. 11: Gear casing
2
A
B
Fig. 12: Gear casing
A
B
3