12RT flex96C 柴油机说明书 08

Piping Group 8

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Servo Oil Piping: Removing, Fitting and Regrinding8447–1/A1

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Hydraulic Piping for Exhaust Valve Drive: Removing, Fitting and Regrinding8460–1/A1

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Fuel Pressure Piping: Removing, Fitting and Regrinding of Sealing Faces8733–1/A1 o Intermediate Fuel Accumulator

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–Checking and Setting of Relief Valve with O.M.T. Test Bench8750–1/A1

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–Checking and Setting of Relief Valve with OBEL Test Bench8750–1/A2

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Fuel Pressure Control Valve: Removal, Fitting, Dismantling and Assembling8750–2/A1

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Fuel Pressure Piping: Removing, Fitting and Regrinding8752–1/A1

Tools:

Key to Illustrations:1Regrinding device

94834a

1Servo oil piping 16Lapping body 2Servo oil piping 17Non-return valve 3Leakage oil piping 18Screwed sleeve 4Shut-off valve 19Valve block

5Shut-off valve 20Intermediate piece 6,a,b

Screw 21Shim 7Flange 22Shim

8Screw

23Connecting piece 9Clamp piece 24Back-up ring 10Shim

25O-ring 11Protective shell 26O-ring 12

Claw

27O-ring 28

O-ring

14,a,b Drain screw

15Bush

DF

Sealing face

1.1Preparatory works

⇒Remove the casing where necessary.⇒Close shut-off valves 4 and 5 for the relevant servo oil piping.⇒

Open drain screw 14.

Remark: The spindles of the closed shut-off valves must be tightened with 200 Nm .1.2Removal of servo oil piping 1⇒Open drain screws 14a.⇒Loosen screws 6.

⇒

Push flanges 7 back till they are no more en-gaged, so that servo oil piping 1 can be re-moved.

D

The ends of the servo oil piping must be pro-tected from any damages.

Servo Oil Piping

Removing, Fitting and Regrinding

1.3Removal of servo oil piping 2

⇒Open drain screws 14b.

⇒Loosen screws 6a and push flanges 7 back till they are no more engaged.

⇒Mark shims 10 together with clamp pieces 9 (Fig. ’A’).

⇒Hold servo oil piping (65 kg) by means of a lifting tackle.

⇒Loosen and remove screws 8 (Fig. ’A’).

⇒Remove clamp pieces with protective shims 11 and shims 10 (Fig. ’A’ view

I-I).

⇒Mark shims 21 and 22 together with connecting piece 23.

⇒Loosen screws 6b and push flange 7 back.

⇒Remove servo oil piping 2.

2.1Checking the claw position

⇒Before fitting the servo oil piping check

whether its claws 12 are screwed on properly

as shown in Fig. ’C’, i.e. the servo oil piping

must protrude by ’x’ = 10 mm compared to

the claw.

D Measure ’x’ can be adjusted by turning the

claw using an open-end wrench.

Remark: On newer engines claw 12 and thrust

ring 13 are provided in one piece.

2.2Fitting the servo oil pipings

Fitting is carried out analogously to the removal but in reverse sequence, whereby

the following points require special attention:

D Fitting position of new back-up rings 24 (Fig. ’B’ views IV and V).

D All shims must be fitted in the same place as before.

D Oil the threads of screws 6, a, b and tighten them crosswise with a torque of

170 Nm.

D When fitting clamp pieces 9 tighten their screws 8 after all servo oil pipings

have been tightened!

D Close all drain screws.

D After refitting the servo oil pipings open shut-off valves 4 and 5, and tighten

their spindles with 200 Nm.