Siemens BTC-BR Manual descarregar pdf (Página 137)

Technical Product Manual

Fault analysis and repairs 1318

3 Removing and fitting housing

Section 3: Removing and fitting housing • Edition 12/2005

TU00-1318-0200302 © Siemens VDO Trading GmbH Section 3 3–45

3.10.3.1 Checking motor

Procedure

Carry out visual check.

Check that the pinion (14) is running freely by turning it slowly and evenly.

Check the resistance value of the motor coil between wires (12) and (11) or

(11.1) with a measuring device.

Permissible value: R = 50 KΩ ± 10%

3.10.3.2 Replacing motor when faulty

Procedure

Push the catch lugs (15) away slightly and push the motor out of the speed

measuring system frame (3).

Remove contacts (9) and (10) from the socket housing (8).

Lock the new motor (13) into the frame on the speed measuring system (3).

Fit contacts (9) and (10) into the socket housing (8).

Note

• Model A can be identified by the black wire (11).

• Model B can be identified by the red-black wire (11.1).

• If this is disregarded (operate model B with approx. 120 km/h warning value

setting):

– Short circuit at ©.

– V board destroyed.

Remark

Repair:

For an abrupt, uneven change in the measured value on the motor coil bet-

ween cables (11) or (11.1) and (12).

Note

• Use the special tool to fit and remove contacts (9) and (10) on the socket

housing (8). (See Chapter

3.10.4)

• Connection leads (11) or (11.1) and (12) are positioned depending on the

model.

– With model A at (a)

– With model B at (b)

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