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Home >> Mercedes Benz >> 2017 >> GLC300 Base >> Repair and Diagnosis >> Transmission >> Transmission Control Systems >> Automatic Transmission - 253 Chassis - 1 Of 3 >> Testing & Repair >> Remove/Install Oil Pump From Transmission Housing - AR27.10-P-0400-02EWM

Remove/Install Oil Pump From Transmission Housing - AR27.10-P-0400-02EWM

Transmission 725.0 

Fig 1: Identifying Removal And Installation Tool (725 589 00 59 00)
G12935443Courtesy of MERCEDES-BENZ USA
Fig 2: Identifying Removal And Installation Tool (725 589 00 59 00)
G12935444Courtesy of MERCEDES-BENZ USA

Remove oil pump 

  1. Attach upright M8 (7) and upright M6 (8) of the SPECIAL TOOL removal and installation tool (11) as shown.
  2. Insert thrust piece (05) into clamping pliers (02) and secure using spring pin (04). 
  3. Place bridge (01) and secure with knurled nut (12).
  4. Place thrust piece (05) on the oil pump (10) by turning it at the spindle (03).

    NOTES Ensure that the thrust piece (05) is correctly seated.

    Otherwise the oil pump (10) can be damaged.

  5. Press oil pump (10) downward up to end stop by turning it at the spindle (03).
  6. Remove retaining ring (13).
  7. Unlock spring pin (04) and remove thrust piece (05) out of clamping pliers (02).
  8. Place clamping pliers (02) onto drive of oil pump (10) and secure with spring pin (04).
  9. Pull oil pump (10) out of torque converter housing (1) by turning it at the spindle (03).
  10. Remove bridge (01) with oil pump (10).
  11. Unlock spring pin (04) and pull out oil pump (10) from tension spring.
    G12935445Courtesy of MERCEDES-BENZ USA

    Install oil pump 

  12. Insert oil pump (10).

    IMPORTANT Apply oil to O-rings of oil pump (10).

    IMPORTANT The markings (arrow) on the oil pump (10) and on the torque converter housing (1) must face towards each other when being assembled.

  13. Insert thrust piece (05) into clamping pliers (02) and secure using spring pin (04).
  14. Place bridge (01) and secure with knurled nut (12).
  15. Place thrust piece (05) on the oil pump (10) by turning it at the spindle (03).

    IMPORTANT Ensure that the thrust piece (05) is correctly seated.

    Otherwise the oil pump (10) can be damaged.

  16. Press oil pump (10) downward up to end stop by turning it at the spindle (03).
  17. Install retaining ring (13).
  18. Remove thrust piece (05) from the oil pump (10) by turning it at the spindle (03).
  19. SPECIAL TOOL Remove removal and installation tool (11).
G12935446Courtesy of MERCEDES-BENZ USA