Mercedes-Benz: engine M272, M273. Manual — part 8
AR05.10-P-7800EW
Remove/install chain tensioner
28.11.11
ENGINES 272, 273 in MODEL 212
1
Chain tensioner
1a
Pressure pin
2
Timing case cover
P05.10-2353-11
P05.10-2354-08
3
Cap
4
Left exhaust camshaft
Removing
1
Rotate engine at crankshaft center bolt in
*001589650900
direction of engine rotation to a 40°
crankshaft angle after ignition TDC
2
Remove alternator
AR15.40-P-5032EW
3
Remove chain tensioner (1) from timing case
cover (2)
Install
4
Screw new chain tensioner (1) into timing
Replace chain tensioner (1). The
case cover (2) and tightened to prescribed
previously installed chain tensioner (1) must
torque
not be reinstalled since, on removal of
pressure bolt (1a), it is pressed into the end
position and the locking device of the
pressure bolt (1a) prevents its return stroke
This would overstretch the timing chain on
reinstalling.
*BA05.10-P-1008-01B
5
Remove cap (3)
6
Turn engine at center bolt on the crankshaft
This unlocks the chain tensioner (1).
with prescribed torque against direction of
engine rotation (arrow), while
counterholding left exhaust camshaft (4) at
rear with a suitable tool
*BA05.10-P-1009-01B
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© Daimler AG, 07.04.13, G/07/14, ar05.10-p-7800ew, Remove/install chain tensioner
ENGINES 272, 273 in MODEL 212
AR05.10-P-7601-01VA
Separate timing chain
602 589 00 98 00
602 589 02 33 00
602 589 05 63 00
602 589 05 63 01
Case
Chain separating tool
Thrust spindle
Pressure pins
1
Cover over timing case recess with a
clean cloth.
The timing case recess must be
secured against parts falling down.
Parts that have fallen into the timing
case recess must be removed.
2
Assemble the chain separating tool
(01) and the
pressure screw (02)
together.
3
Fit the chain separating tool (01) at
the timing chain (1).
Ensure that the
pressure pin
(03) lies at the pin (arrow) of a timing
chain link.
P05.10-2225-06
4
Screw in the pressure screw (02) and separate the timing
5
Remove the
pressure screw (02) and take off the
chain (1).
chain separating tool (01).
Do not let the pins that have been pushed out fall into the
timing case recess.
Страница 1 из 1
© Daimler AG, 07.04.13, G/07/14, ar05.10-p-7601-01va, Separate timing chain
ENGINE 272, 273
AR05.10-P-7601-04VA
Drawing in timing chain
602 589 00 98 00
272 589 03 63 00
Case
Assembly link
1
Cover over timing case recess with a
clean cloth.
The timing case recess must be
secured against parts falling down.
Parts that have fallen into the timing
case recess must be removed.
2
Connect the new timing chain (2) and
the old timing chain (1) with
the
assembly link (01).
Fit the lock of the
assembly
link (01) in the direction opposite to
that in which the timing chain is drawn;
otherwise it could get jammed on the
slide rails and come off when the
timing chain is drawn.
P05.10-2226-05
3
Remove the rags from the timing case recess.
Otherwise, they could get pulled into the timing case
recess when the engine is cranked.
4
Turn the crankshaft slowly in the engine's direction of rotation
(arrow) and draw in the new timing chain (2) until the ends of
the new timing chain (2) can be connected.
As the new timing chain (2) is being drawn in (arrows),
pull out the end of the old timing chain (1) evenly as it
becomes free.
5
Cover over timing case recess with a clean cloth.
The timing case recess must be secured against parts
falling down. Parts that have fallen into the timing case recess
must be removed.
6
Detach the assembly link (01), and separate the old timing
chain (1) from the new timing chain (2).
The assembly link (01) must be removed. The assembly
link is only an aid for assembly and is not suitable for engine
operation.
P05.10-2227-11
Страница 1 из 1
© Daimler AG, 07.04.13, G/07/14, ar05.10-p-7601-04va, Drawing in timing chain
ENGINE 272, 273
AR05.10-P-7601-02VA
Riveting the timing chain
Timing chain, chain tensioner
Number
Designation
Engine
Engine
272
273
BA05.10-P-1007-01B
Bolt for rivet element in timing chain
Nm
32
32
(reference value)
602 589 00 98 00
272 589 00 39 00
272 589 00 63 00
272 589 01 63 00
Case
Riveting tool
Assembly inserts
Guide
271 589 01 63 00
Assembly inserts
When carrying out work on the timing case recess, safeguard this with a clean cloth to
prevent items dropping down. Parts which have fallen into the timing case recess, must be
removed.
Press the riveted link into the press-fit center plate
1
Place the assembly insert (F11) in
the rivet press tool (01) and fix in place with
the mounting screw.
2
Place the assembly insert (D12) in
the rivet press tool (01).
P05.10-2229-01
3
Insert the riveted link (1), the centering fork (03) and the press-fit center plate (2) into
the ends of the timing chain (4), and press the pins of the centering fork (03) into the
holes of the press-fit center plate (2) and center the press-fit center plate (2).
Insert riveted link (1) from the rear.
P05.10-2230-01
Страница 1 из 3
© Daimler AG, 07.04.13, G/07/14, ar05.10-p-7601-02va, Riveting the timing chain
ENGINE 272, 273
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