Check fuel system high-pressure pump and replace components of fuel system if necessary

SM07.02-W-0004A

Check fuel system high-pressure pump and replace components of fuel system if necessary

15.9.15

Engine

473.9 in model 963, 964

Operation no. of the operation texts or standard texts and flat rates

Category

Op. no.

Operation text

Time

Acc. no.

Code

N

029269

Check fuel system high pressure pump

0,9 h

07 922 53

FMU

N

029270

Replace components of fuel system (after check)

7,4 h

07 922 53

FMU

A

Figure 1 (component OK)

B

Figure 2 (component not OK)

Y642

Quantity control valve



Check

1

Remove quantity control valve (Y642) of fuel system high pressure pump



AR07.05-W-0001HC

2

Check quantity control valve (Y642) for dirt

 Compare the appearance of the quantity control valve (Y642) with figures 1 and 2 (A and B).

If the quantity control valve (Y642) as a rust-brown covering like that shown in figure 2 (B):



Continue with operation step 3.

If the quantity control valve (Y642) looks like figure 1 (A):



Reinstall quantity control valve (Y642); no further action is necessary.



AR07.05-W-0001HC

Replace components

3

Replace fuel filter



AP47.20-W-0780H

 With regard to return shipment or scrapping of removed parts, please observe the information in your warranty system.

4

Replace fuel injectors



AR07.03-W-0004H

 With regard to return shipment or scrapping of removed parts, please observe the information in your warranty system.

5

Replace high-pressure fuel pump



AR07.16-W-1005HA

 With regard to return shipment or scrapping of removed parts, please observe the information in your warranty system.

Parts ordering note

Part no.

Designation

Quantity

A 470 090 21 50

Fuel system high pressure pump

1

A 473 070 02 87

Fuel injector

6

A 470 078 08 10

Fuel high-pressure line, cyl. 1-3

3

A 470 078 09 10

Fuel high-pressure line, cyl. 4-6

3

A 002 990 04 00

Twelve-point head bolt

6

A 472 078 03 10

Fuel high-pressure line to rail

2

A 472 094 00 60

Sealing ring

4

A 472 094 01 60

Sealing ring

4

N 000000 001068

Sealing ring

4

A 936 078 01 80

Sealing ring

2

A 000 236 17 80

Shaped gasket

1

A 471 090 08 55

Parts kit for fuel filter

1