Injection pump, servicing
- Observe rules for cleanliness, see RULES FOR CLEANLINESS
- Removing and installing injection pump, see INJECTION PUMP, REMOVING AND INSTALLING
- Dynamically checking and adjusting injection pump, see START OF INJECTION, DYNAMICALLY CHECKING AND ADJUSTING
- Always replace seals and O-rings
NOTE:
- Components marked with an asterisk (*) are checked via the On Board Diagnostic (OBD) program; see DIAGNOSTIC TROUBLE CODE (DTC) MEMORY, CHECKING AND ERASING
- Components marked with a double asterisk (**) can be checked with the output DTM; see FUNCTION 03: OUTPUT DIAGNOSTIC TEST MODE (DTM) .
The following list pertains to Fig 1.
- Oil seal
- Always replace
- Union, 25 Nm (18 ft lb)
- For supply line
- From fuel filter
- Injection pump
- With quantity adjuster (metering)
- With Fuel Temperature Sensor -G81- *, checking, see FUEL TEMPERATURE SENSOR, CHECKING
- With Quantity Adjuster -N146-*, checking, see MODULATING PISTON DISPLACEMENT SENSOR- G419- AND QUANTITY ADJUSTER, CHECKING
- With Modulating Piston Displacement Sensor -G149-*, checking, see MODULATING PISTON DISPLACEMENT SENSOR- G419- AND QUANTITY ADJUSTER, CHECKING
- Fuel shut-off valve -N109-*/**, 25 Nm
- Union
- For return line
- Return line
- To control valve/fuel filter
- 25 Nm (18 ft lb)
- Injector lines
- Tighten to 25 Nm (18 ft lb)
- Remove and install with 3035
- Always remove two-part linework complete
- Do not alter shape
- Line union, 45 Nm (33 ft lb)
- With pressure valve
- 25 Nm (18 ft lb)
- Injector
- Removing and installing, see INJECTORS, REMOVING AND INSTALLING
- Checking, see INJECTORS, CHECKING
- For No. 3 cylinder with Needle Lift Sensor -G80-*
- Checking needle lift sensor, see NEEDLE LIFT SENSOR, CHECKING
- 20 Nm (15 ft lb)
- Retainer
- Mounting
- Copper washer
- Always replace
- 10 Nm (7 ft lb)
- Cold Start Injector -N108-*/**
- Checking injection timing control range, see DIESEL INJECTION TIMING CONTROL RANGE, CHECKING
- Gasket
- Always replace
- Strainer
- Clean strainer if soiled
- Timing control cover
- If leaking, replace gasket, see INJECTION TIMING DEVICE COVER GASKET, REPLACING
- Sleeve
- With nut
- Compact bracket
- For injection pump, Generator and power steering pump
- For vehicles without air conditioner
- Removing and installing:
- Removing and installing compact bracket on vehicles with air conditioner:
- 25 Nm (18 ft lb)
- 20 Nm (15 ft lb) + 1/4 turn (90) further
- Always replace
- The turning angle can be checked with a commercial protractor e.g. Hazet 6690
- Injection pump sprocket
- Removing and installing, see INJECTION PUMP, REMOVING AND INSTALLING
- Nut
- For hub
- Do not loosen or the injection pump basic setting may be altered. This cannot be reset with normal workshop equipment