Injection pump, servicing
WARNING: This page is about a different variant/trim than selected.
- Observe rules for cleanliness → Rules for cleanliness
- Removing and installing injection pump → Injection pump, removing and installing
- Dynamically checking and adjusting injection pump → 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 → Diagnostic Trouble Code (DTC) memory, checking and erasing
- Components marked with a double asterisk (**) can be checked with the output DTM → Output Diagnostic Test Mode, performing .
1 - Oil seal
- Always replace
2 - Union, 25 Nm
- For supply line
- From fuel filter
3 - Injection pump
- With quantity adjuster (metering)
- With Fuel Temperature Sensor G81 * checking → Fuel temperature sensor, checking
- With Quantity Adjuster N146 * checking → Modulating piston displacement sensor G149 and Quantity adjuster N146 , checking
- With Modulating Piston Displacement Sensor G149 * checking → Modulating piston displacement sensor G149 and Quantity adjuster N146 , checking
4 - Fuel Cut-off valve N109 */**, 25 Nm
5 - Union
- For return line
6 - Return line
- To control valve/fuel filter
7 - 25 Nm
8 - Injector lines
- Tighten to 25 Nm
- Remove and install using Injector Line Wrench 3035
- Always remove two-part line work complete
- Do not alter shape
9 - Line union, 45 Nm
- With pressure valve
10 - 25 Nm
11 - Injector
- Removing and installing → Injectors, removing and installing
- Checking → Injectors, checking
- For No. 3 cylinder with Needle Lift Sensor G80 *
- Checking needle lift sensor → Needle lift sensor, checking
12 - 20 Nm
13 - Retainer
14 - Mounting
15 - Copper washer
- Always replace
16 - 10 Nm
17 - Cold Start Injector N108 */**
- Checking injection timing control range → Diesel injection timing control range, checking
18 - Gasket
- Always replace
19 - Strainer
- Clean strainer if soiled
20 - Timing control cover
- If leaking, replace gasket → Injection timing device cover gasket, replacing
21 - Sleeve
- With nut
22 - Compact bracket
- For injection pump, Generator and power steering pump
- For vehicles without air conditioner
- Removing and installing: → 13 - ENGINE - CRANKSHAFT, CYLINDER BLOCK
- Removing and installing compact bracket on vehicles with air conditioner: → 87 - AIR CONDITIONING
23 - 25 Nm
24 - 20 Nm plus 1 / 4 turn (90 ° ) further
- Always replace
- The turning angle can be checked with a commercial protractor e.g. Hazet 6690
25 - Injection pump sprocket
- Removing and installing → Injection pump, removing and installing , Removing and installing injection pump
26 - Nut
- For hub
- Do not loosen or the injection pump basic setting may be altered. This cannot be reset with normal workshop equipment