Scania 16 litre engine. Work Description — part 12

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5

Set up the dial on the cutter adjuster using a
valve.

6

Adjust the cutter. Diameter 37.9 mm and
39.8 mm respectively, refer to Valve seat
insert, machining measurement.

7

Turn off the magnet (position 2). Insert the
guide spindle into the valve bushing. Adjust
the pivot plate so that the distance between
the cutter and the valve seat is
approximately 1 mm. Centre the tool
precisely.

01_1233

8

Turn on the magnet (position 1).

9

Apply the quick-action lock. Make sure the
crank can be turned easily. If not, redo the
centering.

10 Machine the valve seat by cranking

clockwise while turning the feed screw.
Never crank counterclockwise as this will
damage the cutter. Lubricate with cutting oil
while machining.

11 When the surface of the valve seat has been

machined, reduce the cutting pressure by
turning 2-3 revolutions without any feed.
Continue turning while backing the feed
screw. The valve seat cutter is now ready for
the next valve seat.

The valve seats can also be machined using tool
587 061.

Cylinder head

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Valve guides

Renewal

Special tools

1

Press out the valve guides using drift
99 383.

Number

Designation

Illustration

Tool board

99 382

Drift

D1-C6

99 383

Drift

D1-B1

99 382

110 864

99 383

110 865

2

Press in the new valve guides with drift
99 382. Press down the guide as far as
possible using the drift, i.e. until it bottoms
against the spring seat in the cylinder head.

Cylinder head

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Sleeves for unit injectors

Renewal

Special tools

The cylinder head must be removed when
renewing the sleeve for the unit injector. The
valves do not need removing. The illustrations
show the cylinder head with the valves removed
so that the working method can be seen more
clearly.

Number

Designation

Illustration

Tool board

99 394

Guide

D2-A1

99 395

Drift

D2-A1

99 397

Extension piece with
threader shaft

D2-C5, C6

588 221

Pilot tap

99 394

11

3

21

9

99 395

113 221

99 397

113 262

113 297

Cylinder head

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1

Thread the bottom part of the sleeve with
pilot tap 588 221 and guide 99 394. Use
extension piece 99 397.

99 397

113 230

2

Knock out the pilot tap and sleeve from
underneath. Use a 100 mm long metal rod
with diameter 9 mm.

113 284

3

Degrease and check the contact surfaces of
the sleeve and cylinder head. Smooth off
any burrs and irregularities that may score
the sleeve.

4

Degrease the new injector sleeve and apply
a thin film of sealing agent 561 200 on the
sleeve and cylinder head contact surfaces.

5

Press in the sleeve with drift 99 395 and
guide 99 394.

113 231

99 394

99 395

Cylinder head