Checking condition of poly V-belt and tensioner - ra13006010343x(0343)

WARNING: This page does not describe the selected car, but rather 42 other vehicles, including the 1999 Mercedes-Benz S600, 1999 Mercedes-Benz S500, 1999 Mercedes-Benz S420, 1999 Mercedes-Benz S320, and 1999 Mercedes-Benz CL600. However, it is still accessible from the selected car via links, so may be relevant.

A. Poly V-belt, B. Tensioner Engines 601, 602 (except

Operation no. of operation texts and work units or standard texts and flat rates

Fig 1: Locating Mark At Poly-V Belt

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

13-0024-35

Compression tester	connect 001 589 76 21 00 with adapter 124 589 366 300 to positive terminal of battery and terminal 50 (Numbers 1 - 3).
Poly-V belt	mark at a clearly visible point with chalk (arrow). Crank engine in increments.
Tensioner	check condition.
	Note different design.

A. Poly-V belts

The poly-V belt is to be replaced if one of the following damage patterns is determined during testing.

Damage pattern

Fig 2: Identifying Poly-V Belts Damage Pattern (1 Of 3)

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Fig 3: Identifying Poly-V Belts Damage Pattern (2 Of 3)

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Fig 4: Identifying Poly-V Belts Damage Pattern (3 Of 3)

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Rib detached from base of belt (arrow).

Fig 5: Locating Rib Detached From Base Of Belt

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Fig 6: Identifying Transverse Cracks In Ribs And Rib Fractures

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Fig 7: Identifying Transverse Cracks In Several Ribs

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Fig 8: Identifying Transverse Cracks On The Back

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Special tools

Fig 9: Identifying Special Tools (001 589 78 21 00)

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Fig 10: Identifying Special Tools (124 589 36 63 00)

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Fig 11: Identifying Special Tools (001 589 73 21 00)

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Models 124 and 126 1 Connect compression tester 001 589 78 21 00, by separating plug connection (X 27) at the left unit compartment wall and connect connector lead (04) of the compression tester to the plug (terminal 50) with adapter lead 124 589 36 63 00 (05).

Model 124

Fig 12: Identifying Plug Connection, Connector Lead And Adapter Lead - Model 124

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Model 126

Fig 13: Identifying Plug Connection, Connector Lead And Adapter Lead - Model 126

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Model 140

2 Move stop lever on injection pump to stop position (arrow). Crank engine with ignition/starter switch.

NOTE: The following method can also be used: Connect vacuum pump 001 589 73 21 00 to ALDA element and evacuate to vacuum of approx. 400 mbar. Crank engine with ignition/starter switch.

Model 140

Fig 14: Locating Stop Lever On Injection Pump - Model 140

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Model 201

3 Connect compression tester 001 589 78 21 00, by separating plug connector (X 27) at left front wall and connect the connector lead (04) of compression tester to the plug (terminal 50) with adapter lead 124 589 36 63 00.

Model 201

Fig 15: Identifying Plug Connector, Connector Lead And Plug - Model 201

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4 Connect up second connector lead of the compression tester to positive terminal (terminal 30) of the battery.

Fig 16: Locating Connector Lead Of Compression Tester

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Model 202

5 Open cover (1) on plug connection, terminal 30Z (X4/22) on left wheelhouse.

Connect terminal for compressor recorder (A) to plug connection (X4/22).

Model 202

Fig 17: Identifying Cover, Compressor Recorder And Plug Connection - Model 202

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6 Disconnect plug from engine/body plug connection (X26/25). Connect adapter lead (01) to pin A1 (arrow) in connection (X26/25). Connect adapter lead (01) with lead (02) to connector (B) for compression recorder.

Fig 18: Identifying Engine/Body Plug Connection, Adapter Lead, Connector And Pin

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Model 210

7 See Cranking engine with starter model 210).

8 Mark poly V-belt with chalk at a clearly visible point (arrow).

9 Turn engine in increments and check poly V-belt for damage.

Complete process when marking is visible again (one complete belt revolution).

Fig 19: Locating Mark On Poly V-Belt - Model 210

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B. Tensioner

The following parts are to be checked on the tension lever bearing (1st version up to 10/85):

9 Check bearing pin (30) of tension lever (360) for firm seating.

NOTE: The collar of bearing pin (30) must contact the timing case cover (28). The idler pulley must not exhibit any alignment faults.

10 Check tensioner with bearing bush.

NOTE: The idler pulley must not exhibit any alignment faults. The bearing bushes are worn when there is a detectable play between the bearing pin (30) and tension lever (360).

Fig 20: Sectional View Of Tensioner

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