Crankshaft assembly,  OM617

Removal and installation of pulley, vibration damper and balancing disc

 

 

03—340 Removal and installation of pulley, vibration damper and balancing disc

 

Tightening torques
Bolt M 18 x 1.5 x 45 on crankshaft Bolts M 8 x 30
Special tools
Socket 27 mm, 1/2″ square
Torque wrench 150—500 Nm, 3/4″ square
Detent
om617 - 0116-1.jpg
Nm
270-330
25
001 589 65 09 00 001 589 31 21 00 110 589 00 40 00
116 589 10 33 00
Puller for balancing disc

 

Conventional tool

 

Adaptor 3/4″ hex. socket to 1/2″ hex. head
e.g. made by Hazet, D-5630 Remscheid order no. 1058 R-1

 

Note

 

The vibration damper can be renewed without ba­lancing.
When the balancing disc is renewed, static balancing is absolutely required (03—344).
Since January 1979, the fastening screws (17) for pulley and vibration damper on engine 617.950 are inserted without washers (18). On engines 617.951/ 952 from start of series.

 

03.8-340/1 F 2

 

 

 

Removal
om617 - 0117-1.jpg
1 Remove radiator and fan.
2 Remove all V-belts (13-340).
3 Remove pulley and vibration damper.

 

 

 

15

 

 

 

16
15
BoltM 18×1.5×45
25
Radial sealing ring
16
Cup spring
26
Spacing ring
17
Bolt M 8 x 30
27
Woodruff key
18
Washer
28
Crankshaft gear
19
Pulley
30
Crankshaft
20
Vibration damper
55a
Cover
23
Fitted pin 8×8
a
Pin
24
Balancing disc

 

 

 

4 On models 116.120 and 123 with automatic trans­mission 722.120 (W4B 025), insert detent at flywheel as a couterhold when loosening screw in crankshaft.
om617 - 0117-2.jpg

 

103-9243

 

On models 126.120 and 123.with automatic trans­mission 722.303 (W4A 040) use a steel bolt as a counterhold in one of the recesses on balancing disc and on cylinder crankcase (arrow).
om617 - 0117-3.jpg

 

03.8-340/2 F 2

 

 

 

5 Remove screw on crankshaft.
om617 - 0118-1.jpg

 

6 Identify balancing disc and crankshaft by punch marks.
om617 - 0118-2.jpg

 

7 Pull off balancing disc by means of puller. For this purpose, place recess in balancing disc under water pump pulley.
Do not screw-in puller screws too far, since this might damage the radial sealing ring.
om617 - 0118-3.jpg

 

Installation

 

8 Place balancing disc on crankshaft in such a manner that the bores for the fitted pins are in align­ment.
Note: The balancing disc is located on crankshaft by means of two offset fitted pins.

 

03.8-340/3 F 2

 

 

 

9    Mount balancing disc on crankshaft with screw M 18 x 1.5 x 45 and cup springs.
10    Knock-in both fitted pins.
om617 - 0119-1.jpg
103-15477

 

11    Mount the three cup springs with crown toward bolt head.
12    Lubricate bolt on crankshaft and tighten to 270—330 Nm, while applying counterhold to crank­shaft with detent or steel bolt.
Z033- 4669/6

 

13 Install vibration damper, pulley, fan and radiator.

 

14 Tension V-belt.

 

Pulley, vibration damper and balancing disc

 

14    Adjusting indicator
15    Bolt M 18 x 1.5 x45
16    Cup springs
17    6 bolts M 8×30
18   6 washers 8.4
19    Pulley
20    Vibration damper
23    2 fitted pins 8×8
24    Balancing disc
25    Radial sealing ring
26   Spacing ring
27    Woodruff key
28    Crankshaft gear (sprocket)
om617 - 0119-2.jpg

 

03.8-340/4 F 2