Remove/install oil pump

AR27.10-D-0400TSC

Remove/install oil pump

12.02.2020

Transmission

725.0 in model 907

Modification notes

29.11.2019

Operation step added.

Operation step 22

1

Transmission housing

2

Bolts

3

Transmission firewall cover

4

Radial shaft sealing ring

5

Bolts

1

Transmission housing

6

Seal

7

Drive gear

8

Chain

9

Oil pump gear

10

Oil pump

 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

 Caution

Risk of injury caused by scraping or cutting body parts on sharp vehicle parts

Always wear protective gloves when working on or near sharp and non-deburred vehicle parts.
Deburr repair panels.

AS00.00-Z-0017-01A

Topical note

Notes on avoiding damage through contamination and foreign objects

AH00.00-P-5000-01A

Topical note

Notes on threaded connections fastened using a tightening angle-based tightening process

AH00.00-P-0020-01A

Topical note

Notes on self-locking nuts and bolts

AH00.00-N-0001-01A

Notes on automatic transmission

AH27.19-P-0001-01NKB



Remove

1

Remove the transmission with torque converter.

Transmission 725.0 in model 907 with engine 274
Transmission 725.0 in model 907.1/2/6 with engine 654.9

AR27.10-D-0500TSC

2

Fasten transmission onto assembly stand.

AR27.10-D-0600-01TSC



000 588 00 31 00 Assembly stand for cars

WS01.00-N-3028B

 Commercially available devices/tools
Boom crane

 Lifting device

*724589026300

 Support fixture

*725589004000

3

Unscrew quick-release fastener and collect transmission oil in a suitable container.

 Socket wrench

*724589010900

4

Remove torque converter.

AR27.20-D-0500-01TSC

 Assembly device

*725589013100

5

Remove radial shaft sealing ring (4).

AR27.40-D-0300TSC

6

Remove screws (2, 5).

7

Remove transmission firewall cover (3).


Carefully pry off transmission firewall cover (3) at lugs only (arrows).
The sealing surfaces can be damaged otherwise.

8

Remove drive gear (7), chain (8) and oil pump gear (9) together.

9

Remove seal (6).

10

Remove oil pump (10) from transmission housing (1).

AR27.10-D-0400-02TSC

 WIS Service Media
wsm://04_201900_90

 Removal and installation tool

*725589005900



Clean

11

Clean sealing surfaces on transmission firewall cover (3) and transmission housing (1).


When cleaning, make sure that dirt particles do not enter the transmission.
Otherwise, the transmission may be damaged.

Assembly cleaner

*BR00.45-Z-1028-04A



Check

12

Check O-rings of the oil pump (10) for damage.

If the O-rings are damaged,



replace oil pump (10).



Install

13

Install oil pump (10) into transmission housing (1).

AR27.10-D-0400-02TSC

 WIS Service Media
wsm://04_201900_91

 Removal and installation tool

*725589005900

14

Slide on drive gear (7), chain (8) and oil pump gear (9) together.


Check chain (8) is correctly seated on drive gear(7) and oil pump gear (9).
Otherwise mounting problems may occur.

15

Mount new seal (6).

16

Install transmission firewall cover (3).

17

Screw in screws (2, 5).

 Screw/bolt, firewall cover to transmission housing

*BA27.10-P-1005-04H

 Screw/bolt, firewall cover to external plate carrier

*BA27.10-P-1006-04H

18

Install new radial shaft sealing ring (4).

AR27.40-D-0300TSC

19

Install torque converter and check for correct seating.

AR27.20-D-0500-01TSC

Installation height of torque converter, distance dimension bolt flange to flange transmission housing

*BE27.20-P-1001-01F

 Assembly device

*725589013100

 Parallel rest

*126589043100

20

Screw in new quick-release fastener of oil pan.

 Socket wrench

*724589010900

21

Remove transmission from support fixture.



000 588 00 31 00 Assembly stand for cars

WS01.00-N-3028B

 Commercially available devices/tools
Boom crane

 Support fixture

*725589004000

 Lifting device

*724589026300

22

Install transmission with torque converter.

Transmission 725.0 in model 907 with engine 274
Transmission 725.0 in model 907.1/2/6 with engine 654.9

AR27.10-D-0500TSC

23

Fill transmission with transmission oil.

AR27.00-D-0270TSC

Check values for torque converter

Number

Designation

Transmission 725 with engine 256/651/654/656

Transmission 725 with engine 264/274/276/278/642

BE27.20-P-1001-01F

Installation height of torque converter, distance dimension bolt flange to flange transmission housing

mm

21,2 (2)

31,2 (2)

 Automatic transmission complete

Number

Designation

Transmission 725.0

BA27.10-P-1005-04H

Screw/bolt, firewall cover to transmission housing

M8

Stage 1

Nm

10

Stage 2

°

90

 Automatic transmission complete

Number

Designation

Transmission 725.0

BA27.10-P-1006-04H

Screw/bolt, firewall cover to external plate carrier

M6

Nm

10

Repair materials

Number

Designation

Order number

BR00.45-Z-1028-04A

Assembly cleaner

A 000 986 56 01