Remove/install pneumatic pressure relief valve from pump module

AR14.40-W-2048-01A

Remove/install pneumatic pressure relief valve from pump module

 Warning

Risk of burn injuries and scalding when working at AdBlue lines and the components attached to them. Risk of injury to skin and eyes when handling AdBlue. Risk of poisoning caused by swallowing AdBlue

Pour AdBlue into suitable containers only. Wait until the pressure is released before starting any work on the exhaust aftertreatment system.

AS14.40-Z-0001-01A

Notes on use, material properties and handling of AdBlue®

AH14.40-N-0001-01A



End cap for AdBlue(R) intake duct and AdBlue(R) feed line

WF58.50-W-1440-05A



End cap for AdBlue(R) return line

WF58.50-W-1440-06A



End cap for AdBlue(R) feed connection on pump module and AdBlue(R) feed and return connection on AdBlue(R) tank

WF58.50-W-1440-07A

Engine

457.9, 541.9, 542.9, 902.9, 926.9 in model all

with code MS4 (BlueTec 4 (Euro IV))

Engine

457.9, 541.9, 542.9, 902.9, 926.9 in model all

with code MS5 (BlueTec 5)

Engine

900.9, 902.9, 924.9, 925.9, 926.9 in model all

with code MS4 (BlueTec 4 (Euro IV))

Engine

900.9, 902.9, 924.9, 925.9, 926.9 in model all

with code MS5 (BlueTec 5)

Engine

900.917/918/919 in model 668, 670

Pump modules with part number A 000 140 05 78

 Compressed air lines

Number

Designation

Model 374

Model 375.3/4

BA00.18-N-1003-01A

Compressed-air connector coupling SCHÄFER "SDF" in metallic material

M10x1

Nm

5

5

 Compressed air lines

Number

Designation

Model 930, 932, 933, 934, 950, 952, 953, 954, 957, 958

BA00.18-N-1003-01A

Compressed-air connector coupling SCHÄFER "SDF" in metallic material

M10x1

Nm

5

 Exhaust aftertreatment, Blue Tec

Number

Designation

Engine 900.9 in model 668, 670

BA14.40-N-1033-02E

Screw-in bushing for the internal pressure relief valve on the pump module

Nm

10

 Exhaust aftertreatment, Blue Tec

Number

Designation

Engine 900.9 in model 668, 670

BA14.40-N-1034-02E

Compressed air connection system SCHÄFER "SDF" on screw-in bushing for internal pressure relief valve

Nm

5

 Exhaust aftertreatment

Number

Designation

ENGINE 457.9 with CODE MS4 or CODE MS5

BA14.40-N-1054-02B

Screw-in bushing for the internal pressure relief valve on the pump module

Nm

10

 Exhaust aftertreatment

Number

Designation

Engine 900.9, 902.9, 924.9, 925.9, 926.9 with code MS4 or code MS5

BA14.40-N-1054-02C

Screw-in bushing for the internal pressure relief valve on the pump module

Nm

10

 Exhaust aftertreatment

Number

Designation

ENGINE 541.9 with CODE MS4 or CODE MS5

ENGINE 542.9 with CODE MS4 or CODE MS5

BA14.40-N-1055-02A

Screw-in bushing for the internal pressure relief valve on the pump module

Nm

10

10

Repair materials

Number

Designation

Order number

BR00.45-Z-1019-06A

ABS sensor grease

A 000 989 62 51 10

1

Thoroughly clean area of threaded bushing (3) of internal pneumatic pressure reduction valve on pump module (1).

2

Disconnect compressed-air line (2) at threaded bushing (3).

3

Pull off AdBlue feed line (4) at feed connection (8) and seal with self-fabricated end cap (5).

4

Pull off AdBlue return line (6) at return connection (9) and seal with self-fabricated end cap (7).

5

Seal feed connection (8) with self-fabricated end cap (10).

6

Remove threaded bushing (3).

7

Remove internal pneumatic pressure reduction valve (12).

 For removal, use a screw (11) with the dimension M550. Screw in screw (11) up to noticeable end stop; then, pull out with suitable pliers.
Ensure that the axial O-ring (18) is also removed and does not remain in the bore or stick to the threaded bushing when it is removed in the previous step.

8

Thoroughly clean bore and thread in pump module with a lint-free rag.

9

Apply a very thin coat of lubricant to O-rings (13, 14, 15).

 It is vital to ensure that the bores (16, 17) are not clogged with lubricant,
as this could cause a function failure of the internal pneumatic pressure reduction valve.

10

Position axial O-ring (18) and install internal pneumatic pressure reduction valve (12).

 For installation, use a screw (11) with the dimension M550. Screw in screw (11) up to noticeable end stop; then, insert internal pneumatic pressure reduction valve (12) into the blind hole bore of the pump module up to end stop, applying slight pressure.
It is vital to ensure that no dirt enters the pump module and the O-rings are not damaged during insertion.

11

Remove screw/bolt (11).

12

Check that axial O-ring (18) is seated correctly on internal pneumatic pressure reduction valve (12) and align if necessary.

13

Install threaded bushing (3)Engine 457.9 in model 374, 375, 695, 940, 942, 943, 944, 958
with code MS4 (BlueTec 4 (Euro IV))
Engine 457.9 in model 374, 375, 695, 940, 942, 943, 944, 958
with code MS5 (BlueTec 5)
  Engine 541.9 in model 930, 932, 933, 934, 950, 952, 953, 954
with code MS4 (BlueTec 4 (Euro IV))
Engine 541.9 in model 930, 932, 933, 934, 950, 952, 953, 954
with code MS5 (BlueTec 5)
Engine 542.9 in model 930, 932, 934, 950, 952, 954
with code MS4 (BlueTec 4 (Euro IV))
Engine 542.9 in model 930, 932, 934, 950, 952, 954
with code MS5 (BlueTec 5)
  Engine 900.9, 902.9, 924.9, 925.9, 926.9 in model 375, 958, 970, 972, 974, 975, 976
with code MS4 (BlueTec 4 (Euro IV))
Engine 900.9, 902.9, 924.9, 925.9, 926.9 in model 375, 958, 970, 972, 974, 975, 976
with code MS5 (BlueTec 5)
Engine 902.9 in model 375, 950, 952, 953, 954, 957
with code MS4 (BlueTec 4 (Euro IV))
Engine 902.9 in model 375, 950, 952, 953, 954, 957
with code MS5 (BlueTec 5)
Engine 926.9 in model 949, 950, 952, 953, 954, 957, 958
with code MS4 (BlueTec 4 (Euro IV))
Engine 926.9 in model 949, 950, 952, 953, 954, 957, 958
with code MS5 (BlueTec 5)
  Engine 900.9 in model 668, 670
  Engine 900.9 in model 668, 670  .

14

Attach AdBlue feed line (4) to feed connection (8).

15

Attach AdBlue return line (6) to return connection (9).

16

Attach compressed-air line (2) to threaded bushing (3)Engine 457.9, 541.9, 542.9, 902.9, 926.9 in model 374, 375, 930, 932, 958
with code MS4 (BlueTec 4 (Euro IV))
Engine 457.9, 541.9, 542.9, 902.9, 926.9 in model 374, 375, 930, 932, 958
with code MS5 (BlueTec 5)  .