Drain/fill rear axle gear oil

AR35.31-P-0523MSA

Drain/fill rear axle gear oil

21.07.2020

Transmission

725.0 in model 257 with engine 264

Transmission

725.0 in model 257, 290 with engine 256

50g

Oil filler plug

50h

Drain screw

50g

Oil filler plug

50h

Drain screw

 Caution

Risk of injury to skin and eyes due to handling of transmission oil. Health risk caused by swallowing transmission oil

Wear protective gloves, protective clothing and safety glasses.
Do not pour transmission oil into beverage bottles.

AS00.40-Z-0001-01A

Topical note

Notes on self-locking nuts and bolts

AH00.00-N-0001-01A

Drain off

1

Lift vehicle with vehicle lift.

AR00.60-P-1006A

2

Clean area surrounding oil filler screw (50g) and drain screw (50h).

Assembly cleaner

*BR00.45-Z-1028-04A

3

Remove oil filler screw (50 g).

4

Remove drain screw (50h) and collect rear axle differential oil in suitable container.



Clean

5

Clean threaded holes of oil filler screw (50g) and drain screw  (50h) in rear axle differential using cleaning spray.

Loctite 7063 (400 ml) cleaning spray

*BR00.45-Z-1046-04A

Fill

6

Apply one drop of sealant to the lower third of the thread on the drain plug (50h).

 Replace drain screw (50h).

Sealant, Omnifit 100H (50 g)

*BR00.45-Z-1061-01A

7

Screw in and tighten drain screw (50h).

 Drain screw to rear axle differential

*BA35.31-P-1003-02H

8

Add rear axle differential oil using hand pump to rear axle differential.



Differentiating characteristics of cast iron differential housings

Transmission 725.0 in model 290 with engine 256

GF35.31-P-0002-02A



Differentiating characteristics of aluminum differential housings

Transmission 725.0 in model 257 with engine 256
Transmission 725.0 in model 257 with engine 264

GF35.31-P-0002-01A

 Observe differentiating features in order to determine the correct oil filling capacity.

 Transmission 725.0 in model 290 with engine 256Rear axle differential filling capacity

*BF35.31-P-1001-02G

 Transmission 725.0 in model 257 with engine 256
Transmission 725.0 in model 257 with engine 264Filling capacity

*BF35.31-P-1001-02E

 Hand pump

*210589007100

9

Apply a drop of sealant to the lower third of the thread on the oil filler screw (50g).

 Replace oil filler screw (50 g).

Sealant, Omnifit 100H (50 g)

*BR00.45-Z-1061-01A

10

Screw in and tighten oil filler screw (50g).

 Oil filler screw of rear axle differential

*BA35.31-P-1002-02H

11

Check rear axle differential for leak tightness.

12

Lower vehicle with vehicle lift.

AR00.60-P-1006A

 Rear axle differential housing

Number

Designation

Model 257

Model 290 with engine 256

BA35.31-P-1002-02H

Oil filler screw of rear axle differential

Nm

50

50

 Rear axle differential housing

Number

Designation

Model 257

Model 290 with engine 256

BA35.31-P-1003-02H

Drain screw to rear axle differential

Nm

50

50

 Rear axle gear

Number

Designation

Model 257

BF35.31-P-1001-02E

Filling capacity

ALU rear axle differential 183

Liter

0,8

Sheet

BB00.40-P-0239-71A

ALU rear axle differential 197

Liter

0,9

Sheet

BB00.40-P-0239-71A

ALU rear axle differential 205

Liter

1,0

Sheet

BB00.40-P-0239-71A

 Rear axle gear

Number

Designation

Model 290

BF35.31-P-1001-02G

Rear axle differential filling capacity

FE rear axle differential 215

Liter

1,10

Rear axle differential 228

Liter

1,68

Specified gear oils - overview

BB00.40-P-0231-01A

Approved axle gear oils

BB00.40-P-0235A

Repair materials

Number

Designation

Order number

BR00.45-Z-1028-04A

Assembly cleaner

A 000 986 56 01

BR00.45-Z-1046-04A

Loctite 7063 (400 ml) cleaning spray

A 001 986 71 71 09

BR00.45-Z-1061-01A

Sealant, Omnifit 100H (50 g)

A 002 989 23 71