Retarder - oil change

AP43.30-W-4301A

Retarder - oil change

18.05.2016

Model

375.4, 930, 932, 933, 934, 944, 950, 952, 953, 954

with code BA9 (Voith secondary retarder R 115)

Shown on model 930

1

Retarder housing

2

Central oil drain screw

3

O-ring

4

O-ring

5

Sealing ring

6

Screw plug with sieve

7

Sealing ring

8

Oil filler plug

9

Sealing ring

10

Oil filler plug

11

Sealing ring

 Danger !

Risk of injury caused by touching hot retarder and by scalding from hot retarderoil. Risk of injury to skin or eyes caused by retarder oil escaping under high pressure

Do not carry out any work unless retarder is switched off. Wear suitable protective clothing and safety glasses when working on the hot retarder.

AS43.30-Z-0001-01A

1

Set engine control/permanent brake operating lever to "0" position and switch-off ignition

2

Remove step plate

On semitrailer/tractor combinations except model 375.4, 944

3

Clean area around the central oil drain screw (2), the screw plug with sieve (6) as well as the oil filler screw (8 or 10).

4

Unscrew oil filler plug (8 or 10)

 Depending on accessibility or on vehicles with solid body, oil can be filled via the bore in the oil filler screw (8 or 10).

5

Undo central oil drain screw (2) and drain oil into a clean vessel

 Drain oil when warm.
Measure volume of drained oil and determine quantity.

 Retarder oils

*BF43.30-N-1001-01A

If the quantity is too low:



Check retarder for any leakage.

If the quantity is too high:



Check transmission for any leakage.

6

Remove O-rings (3 and 4) and sealing ring (5) of central oil drain screw (2) and install new

 Apply Vaseline to new O-rings.

Vaseline

*BR00.45-Z-1015-06A

7

Screw in central oil drain screw (2) and tighten

 Inspect central oil drain screw, replace if necessary.

 Central oil drain screw

*BA43.30-N-1017-01A

8

Undo screw plug with sieve (6) from retarder housing (1)

9

Use pure benzine to clean sieve of screw plug (6) and then use compressed air to blow off

10

Turn in and tighten screw plug with sieve (6)

 Replace sealing ring (7).

 Screw plug, pressure regulator valve to retarder housing

*BA43.30-N-1005-01A

11

Slowly pour in specified quantity

 To bleed the retarder system correctly the oil should be poured in over a period in excess of 3 minutes.
If accessibility is poor or where vehicles have a solid body fill oil using hand pump over oil filler screw (10).

 Retarder oils

*BF43.30-N-1001-01A

 Hand pump

*112589007200



12

Screw in oil filler plug (8) and tighten fully

 Replace sealing ring (9).

 Upper oil filler screw

*BA43.30-N-1015-01A

13

Screw in oil filler screw (10) and tighten

 Replace sealing ring (11).

 Side oil filler screw

*BA43.30-N-1016-01A

14

Install step plate

On semitrailer/tractor combinations except model 375.4, 944

 Retarder

Number

Designation

MODEL 375, 944 with CODE BA9 (Voith secondary retarder R 115)

MODEL 930, 932, 933, 934, 950, 952, 953, 954 with CODE BA9 (Voith secondary retarder R 115)

BA43.30-N-1005-01A

Screw plug, pressure regulator valve to retarder housing

Nm

130

130

 Retarder

Number

Designation

MODEL 375, 944 with CODE BA9 (Voith secondary retarder R 115)

MODEL 930, 932, 933, 934, 950, 952, 953, 954 with CODE BA9 (Voith secondary retarder R 115)

BA43.30-N-1015-01A

Upper oil filler screw

Nm

100

100

 Retarder

Number

Designation

MODEL 375, 944 with CODE BA9 (Voith secondary retarder R 115)

MODEL 930, 932, 933, 934, 950, 952, 953, 954 with CODE BA9 (Voith secondary retarder R 115)

BA43.30-N-1016-01A

Side oil filler screw

Nm

100

100

 Retarder

Number

Designation

MODEL 375, 944 with CODE BA9 (Voith secondary retarder R 115)

MODEL 930, 932, 933, 934, 950, 952, 953, 954 with CODE BA9 (Voith secondary retarder R 115)

BA43.30-N-1017-01A

Central oil drain screw

Nm

55

55

 Retarder

Number

Designation

Model 375.4, 944
with code BA9 (Voith secondary retarder R 115)

Model 930, 932, 933, 934, 950, 952, 953, 954
with code BA9 (Voith secondary retarder R 115)

BF43.30-N-1001-01A

Retarder oils

Filling capacity, maintenance or for reconditioned assembly

Liter

5,9

5,9

Filling capacity after replacement of heat exchanger

Liter

6,3

6,3

Sheet

BB00.40-P-0235-27A

BB00.40-P-0235-27A

Sheet

BB00.40-P-0235-28A

BB00.40-P-0235-28A

Sheet

BB00.40-P-0235-29A

BB00.40-P-0235-29A

Repair materials

Number

Designation

Order number

BR00.45-Z-1015-06A

Vaseline

Friedrich Scharr KG
Liebknechtstr. 50
70565 Stuttgart, Germany
Tel. +49 711 7868-481
Fax +49 711 7868-489
www.scharr.de