SI13.25-W-0002C | Service Information: Modifications/New Features in Belt Drive | 30.4.09 |
MODEL 950.5 /6, 952.5 /6, 953.6, 954.5, 957, 970, 972, 974, 975, 976
The belt drive of the engine model series OM 900 has been optimized as part of ongoing technical developments. The procedure in the case of repair is described in the following.
We would like to point out that when ordering a defective component in addition the specified components still have to be ordered at the same time.
Once the repair is complete in the vehicle documentation system the previous variant parts list has to be erased from the vehicle data card and replaced by the new variant parts list.
Vehicle documentation system screen 1512: Changes, variant parts lists
- Poly-V-belt
- Poly-V-belt tensioner
- Guide pulley
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Series change introduction
Model 950.5/6, 952.5/6, 953.6, 954.5, 970, 972, 974, 975, 976
without code MP6, MP7, MP8 (Preinstallation for retrofitting Frigoblock)
The series production breakpoint on the basic belt drive takes place as of engine end no. 364 937.
Model 950.5/6, 952.5/6, 953.6, 954.5, 970, 972, 974, 975, 976
with 6-cylinder engine
, with code MP6, MP7, MP8 (Preinstallation for retrofitting FRIGOBLOCK)
The series production breakpoint on the Frigoblock belt drive takes place as of engine end no. 455 577.
Type 957
The series production breakpoint on the basic belt drive takes place as of engine end no. 479 436.
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Procedure in the case of repair
1 Damage to the basic belt drive
Model 950.5/6, 952.5/6, 953.6, 954.5, 957, 970, 972, 974, 975, 976 with code H03 (air conditioning)
In the event of failure of poly-V-belt tensioner (Dayco company)
- Install new poly-V-belt tensioner (Gates company) and in addition new guide pulley dia. 75 mm (Gates company) and new poly-V-belt (Gates company).
In the event of failure of guide pulley (Dayco company)
- Install 106 mm dia. new guide pulley (Dayco company) with previous part number.
In the event of failure of the poly-V-belt (Dayco company)
- Install new poly-V-belt (Dayco company) with previous part number.
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2 Damage to basic belt drive
Model 950.5/6, 952.5/6, 953.6, 954.5, 957, 970, 972, 974, 975, 976 without code H03 (air conditioning)
In the event of failure of poly-V-belt tensioner (Dayco company)
- Install poly-V-belt tensioner (Gates company) and new poly-V-belt (Gates company).
In the event of failure of the poly-V-belt (Dayco company)
- Install new poly-V-belt (Dayco company) with previous part number.
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3 Damage to Frigoblock belt drive
Model 950.5/6, 952.5/6, 953.6, 954.5
Model 970, 972, 974, 975, 976 with 6-cylinder engine
In the event of failure of the poly-V-belt tensioner (Dayco company):
- Install new poly-V belt tensioner (Gates company) and in addition new spacer washer and new poly-V belt (Dayco company) with previous part number.
In the event of failure of the poly-V-belt (Dayco company):
- Install new poly-V-belt (Dayco company) with previous part number.
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4 Damage to Frigoblock belt drive
Model 970, 972, 974, 975, 976 with 4-cylinder engine
In the event of failure of the poly-V-belt tensioner (Dayco company):
- Install new poly-V-belt tensioner (Dayco company) with previous part number.
In the event of failure of the poly-V-belt (Dayco company):
- Install new poly-V-belt (Dayco company) with previous part number.
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Overview of previous/revised parts scope according to variant parts list
Basic belt drive
Model 950.5/6, 952.5/6, 953.6, 954.5, 970, 972, 974, 975, 976
Without code H03
Previous parts scope according to variant parts list:
Z505.072/01 Poly-V-belt tensioner (Dayco company)
Z505.031/03 Poly-V-belt (Gates company), with belt pulley for coolant pump with 164 mm dia.
Z505.031/02 Poly-V-belt (Gates company), with belt pulley for coolant pump with 200 mm dia.
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Revised parts scope according to variant parts list:
Z505.072/31 Poly-V-belt tensioner (Gates company)
Z599.031/03 Poly-V-belt (Gates company), with belt pulley for coolant pump with 164 mm dia.
Z599.031/02 Poly-V-belt (Gates company), with belt pulley for coolant pump with 200 mm dia.
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Basic belt drive
Model 950.5/6, 952.5/6, 953.6, 954.5, 970, 972, 974, 975, 976
with code H03
Previous parts scope according to variant parts list:
Z505.072/01 Poly-V-belt tensioner (Dayco company)
Z505.072/10 Guide pulley (Gates company), 106 mm dia.
Z505.031/05 Poly-V-belt (Gates company), with belt pulley for coolant pump with 164 mm dia.
Z505.031/04 Poly-V-belt (Gates company), with belt pulley for coolant pump with 200 mm dia.
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Revised parts scope according to variant parts list:
Z505.072/31 Poly-V-belt tensioner (Gates company)
Z505.072/25 Guide pulley (Gates company), 75 mm dia.
Z599.031/05 Poly-V-belt (Gates company), with belt pulley for coolant pump with 164 mm dia.
Z599.031/04 Poly-V-belt (Gates company), with belt pulley for coolant pump with 200 mm dia.
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Basic belt drive
Model 957 with code H03
Previous parts scope according to variant parts list:
Z505.072/13 Poly-V-belt tensioner (Dayco company)
Z505.072/02 Poly-V-belt tensioner (Dayco company)
Z505.072/10 Guide pulley (Gates company), 106 mm dia.
Z505.031/07 Poly-V-belt (Gates company), with belt pulley for coolant pump with 164 mm dia.
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Revised parts scope according to variant parts list:
Z505.072/35 Poly-V-belt tensioner (Gates company)
Z505.072/35 Poly-V-belt tensioner (Gates company)
Z505.072/25 Guide pulley (Gates company), 75 mm dia.
Z599.031/07 Poly-V-belt (Gates company), with belt pulley for coolant pump with 164 mm dia.
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Basic belt drive
Model 957 without code H03
Previous parts scope according to variant parts list:
Z505.072/13 Poly-V-belt tensioner (Dayco company)
Z505.072/02 Poly-V-belt tensioner (Dayco company)
Z505.031/15 Poly-V-belt (Gates company), with belt pulley for coolant pump with 164 mm dia.
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Revised parts scope according to variant parts list:
Z505.072/35 Poly-V-belt tensioner (Gates company)
Z505.072/35 Poly-V-belt tensioner (Gates company)
Z599.031/15 Poly-V-belt (Gates company), with belt pulley for coolant pump with 164 mm dia.
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Frigoblock belt drive
Model 950.5/6, 952.5/6, 953.6, 954.5, 970, 972, 974, 975, 976
with 6-cylinder engine
with code MP6, MP7, MP8
Previous parts scope according to variant parts list:
Z505.072/07 Poly-V-belt tensioner (Dayco company)
Revised parts scope according to variant parts list:
Z505.072/42 Poly-V-belt tensioner (Gates company)
Parts ordering notes
Part no. | Designation | Quantity |
Model 950.5/6, 952.5/6, 953.6, 954.5, 970, 972, 974, 975, 976 without code H03 | ||
A906 200 45 70 | Poly-V-belt tensioner (Z 505.072/31) | 1 |
N910142 010001 | Bolt (Z 505.072/31) | 1 |
A000 993 42 96 | Poly-V-belt, length 1390 mm with belt pulley for coolant pump with 164 mm dia. (Z 599.031/03) | 1 |
A000 993 44 96 | Poly-V-belt, length 1447 mm with belt pulley for coolant pump with 200 mm dia. (Z 599.031/02) | 1 |
Model 950.5/6, 952.5/6, 953.6, 954.5, 970, 972, 974, 975, 976 with code H03 | ||
A906 200 45 70 | Poly-V-belt tensioner (Z 505.072/31) | 1 |
N9101422 010001 | Bolt (Z 505.072/31) | 1 |
A906 200 44 70 | Guide pulley (Z 505.072/25) | 1 |
A906 993 74 96 | Poly-V-belt, length 1955 mm with belt pulley for coolant pump with 164 mm dia. (Z 599.031/05) | 1 |
A000 993 45 96 | Poly-V-belt, length 1993 mm with belt pulley for coolant pump with 200 mm dia. (Z 599.031/04) | 1 |
Model 950.5/6, 952.5/6, 953.6, 954.5, 970, 972, 974, 975, 976 with code MP6, MP7, MP8 (Frigoblock) (with 6-cylinder engine) | ||
A906 200 39 70 | Poly-V-belt tensioner (Z 505.072/42) | 1 |
N000912 010033 | Bolt (Z 505.072/42) | 1 |
A904 155 04 52 | Spacer washer (Z 505.072/42) | 1 |
Model 957 without code H03 | ||
A906 200 45 70 | Poly-V-belt tensioner (Z 505.072/35) | 1 |
N000912 010224 | Bolt (Z 505.072/35) | 1 |
A906 202 03 40 | Belt tensioner bracket (Z 505.072/35) | 1 |
A906 200 12 70 | Guide pulley (Z 505.072/35) | 1 |
A004 990 81 04 | Bolt (Z 505.072/35) | 1 |
A000 993 46 96 | Poly-V-belt, length 1984 mm (Z 599.031/15) | 1 |
Model 957 with code H03 | ||
A906 200 45 70 | Poly-V-belt tensioner (Z 505.072/35) | 1 |
N000912 010224 | Adapter plate (Z 505.072/35) | 1 |
A906 202 03 40 | Adapter plate (Z 505.072/35) | 1 |
A906 200 12 70 | Guide pulley (Z 505.072/35) | 1 |
A004 990 81 04 | Bolt (Z 505.072/35) | 1 |
A906 200 44 70 | Guide pulley (Z 505.072/25) | 1 |
A000 993 97 96 | Poly-V-belt, length 2556 mm (Z 599.031/07) | 1 |