Remove/Install Transmission Oil Pump Gear - AR27.10-P-0400-01NKB

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Transmission 724.0 in model 117, 118, 156, 176, 177, 242, 246, 247

Topical note

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

AH00.00-P-0020-01A

MODIFICATION NOTES

08.08.2018

Factual information added

Operation step 8

AUTOMATIC TRANSMISSION COMPLETE

Number	Designation			Transmission 724.0
BA27.10-P-1008-04F	Nut (left-hand thread), oil pump gear to oil pump	Stage 1	Nm	10
BA27.10-P-1008-04F	Nut (left-hand thread), oil pump gear to oil pump	Stage 2	∠°	180

AUTOMATIC TRANSMISSION COMPLETE

Number	Designation		Transmission 724.0
BA27.10-P-1009-04F	Nut, hollow shaft rotor to oil pump	Nm	7

Fig 1: Identifying Puller (724 589 01 33 00)

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Fig 2: Identifying Puller (724 589 02 33 00)

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The following special tools are required: puller (724 589 02 33 00), puller (724 589 01 33 00)

The special tool puller (724 589 02 33 00) consists of the following individual special tools:

724 589 02 33 01

724 589 02 33 02

724 589 02 33 03

724 589 02 33 04

724 589 02 33 05

Do not use an impact wrench or compressed air tool.

Otherwise there may be damage to the special tool and the shaft of the primary oil pump.

Perform operation steps 1 to 12 to remove and install the drive gear of the primary oil pump (oil pump gear (2)).

Perform operation steps 13 to 20 to remove and install the sensor rotor (55P) of the hollow shaft (55W) on the primary oil pump.

Remove oil pump gear (2).

Transmission 724.0 in model 117, 156, 176, 242, 246
Determine the version of oil pump gear (2) installed.

Old variant of the oil pump gear (2) has 4 holes; new variant has 6 holes.
Insert special tool (01) into oil pump gear (2).

Make sure that the pins of special tool (01) engage correctly in the oil pump gear (2).
Unscrew nut (1) of oil pump gear (2).

The nut (1) of the oil pump gear (2) has a left-hand thread.

The special tool (01) supports itself on the coupling housing (K27) when removing the nut (1).

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Insert special tool (03) (old version) or special tool (04) (new version) into the holes of the oil pump gear (2).

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Insert special tool (03) (old version) or special tool (04) (new version) into the elongated holes of the special tool (01).

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Lift up special tool (01) slightly and install special tool (05) between special tool (01) and oil pump gear (2).

Make sure that the special tool (01) is seated in center, above the oil-pump drive shaft.

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Screw special tool (02) into special tool (01) and pry off oil pump gear (2).

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Install oil pump gear (2).
Plug oil pump gear (2) onto shaft of primary oil pump.
Replace oil pump gear (2) after each removal.

Otherwise the transmission will be damaged.
Tighten nut (1).

Nut (1) has a left-hand thread.
Insert special tool (01) into oil pump gear (2).

Make sure that the pins of special tool (01) engage correctly in the oil pump gear (2).
Tighten nut (1) to specified torque .
Remove special tool (01) from oil pump gear (2).

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Remove sensor rotor (55P).
Install the puller (09) by hand onto sensor rotor (55P).

Make sure that the puller (09) is correctly seated on the sensor rotor (55P).

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Release nut (55M) of sensor rotor (55P).

Release nut (55M) of sensor rotor (55P) by turning the hexagon (07) of the puller (09). To loosen the nut (55M), counterhold the puller (09) at the hexagon (07) of the puller (09) using a suitable tool.

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Unscrew nut (55M) of sensor rotor (55P) and detach sensor rotor (55P) from hollow shaft (55W).

The nut (55M) is unscrewed and the sensor rotor (55P) detached from the hollow shaft (55W) in a single operation, whereby the hexagon (08) of the puller (09) is turned. Counterhold the puller (09) at the hexagon (07) using a suitable tool.

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Install sensor rotor (55P).
Place sensor rotor (55P) on hollow shaft (55W).
Screw on nut (55M) by hand.

Always replace nut (55M) after removal.
Install puller (09) onto sensor rotor (55P).

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Tighten nut (55M) using puller (09) .

The nut (55M) is tightened by turning the hexagon (07) on the puller (09). Counterhold the puller (09) when tightening at the hexagon (07) using a suitable tool.
Remove puller (09) from sensor rotor (55P).

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