Service engine brake valve fitting

AR14.15-G-5810BB

Service engine brake valve fitting

9.1.12



Disassemble

1

Remove engine brake flap fitting (1)

Engine 902.923/924/ 935, 906.935/955

AR14.15-G-6302BB

Engine 926.969

AR14.15-G-6302F

2

Remove engine brake cylinder (10)

 Remove retainer (11).

3

Remove spacer sleeve (8)

4

Detach adjustment lever (12)

5

Detach bracket (6)

6

Remove injection nozzle for exhaust aftertreatment system

Engine 902.923/924

AR14.40-G-2000B

7

Remove engine brake valve (4)

 Close engine brake flap (4) for this step.

8

Remove engine brake shaft (3) and bearing bushings (2)

 Use a suitable drift.



Assembly

9

Install bearing bushing (2) on side of bracket

 With a protrusion of about 3 mm to the inner attachment face. Use a suitable drift. Coat bearing point with paste.

*BR00.45-Z-1005-06A

10

Insert engine brake flap (4) into the engine brake flap connection (1) and push engine brake shaft (3) through

 Coat bearing point with paste.

*BR00.45-Z-1005-06A

11

Knock in second bearing bushing (2)

 Center the engine brake shaft (3) to the flap fitting dia.

The projection of both bearing bushings (2) to the inner contact surface must be the same.

Use a suitable drift.

12

Knock back bearing bushings (2) evenly on both sides and sufficiently until axial play (A) of engine brake shafts (3) is achieved

 Check engine brake shaft axial play (A) using a feeler gauge.

Use a suitable drift.

*BE14.15-N-1004-01E

13

Tighten down engine brake flap (4)

 The screw heads of the bolts (5) must point towards engine when engine brake flap (4) is closed. Center engine brake flap (4) in engine brake flap connection (1). Engine brake flap (4) must be resting against flap connection stop in the closed position.

14

Measure annular gap at engine brake flap (4)

 Engine brake flap (4) must not be touching flap connection passage radially in the closed position.

15

Install injection nozzle for exhaust aftertreatment system

Engine 902.923/924

AR14.40-G-2000B

16

Attach bracket (6)

17

Attach adjustment lever (12)

 Mount adjustment lever (12) on to the splines of the engine brake shaft (3) so that the adjustment lever stop is resting against the bracket (6) when the engine brake flap (4) is fully opened (position B).

18

Check setting of engine brake valve (4)

 When engine brake flap (4) is open (position B), the adjustment lever stop must not be resting against bracket (6) (distance of 1 mm).

19

Install spacer sleeve (8)

20

Install engine brake cylinder (10)

 Install new nut (9).



Notes on self-locking nuts and bolts

AH00.00-N-0001-01A

21

Set pretension of engine brake cylinder (10) and install retainer (11)

When engine brake flap is opened (4, position B), turn the ball socket (10.2.about 2 revolutions) until the specified setting is achieved.

*BE14.15-N-1002-01E

 Observe adjustment dimension of engine brake cylinder (10).

*BE14.15-N-1001-01E

22

Install engine brake flap connection (1)

Engine 902.923/924/ 935, 906.935/955

AR14.15-G-6302BB

Engine 926.969

AR14.15-G-6302F

Number

Designation

Engine
900.91/92, 902.92/93, 904.92/95, 906.935/95, 924.91/92/93, 926.96

BE14.15-N-1001-01E

Adjustment dimension of engine brake cylinder

mm

183.0 to 184.0

BE14.15-N-1002-01E

Engine brake cylinder - preload

mm

1.0 to 2.0

BE14.15-N-1004-01E

Engine brake shafts - axial play between bushings

mm

0.3...0.5

Number

Designation

Order number

BR00.45-Z-1005-06A

Paste, hot lubrication 1 kg, DB supply specification 6879.20

A 000 989 76 51