Triumph TR6 PI Operation Manual page 422

WINDSCREEN WIPERS AND WASHERS
WINDSCREEN WIPER MOTOR
Overhaul
General
84.15.18
If the motor is not operating correctly, check the electrical
supply of 12 volts on terminal 5 with normal speed selected
and terminal 3 with high speed selected. Also check the
electrical earth on terminal I.
If the electrical supply and the earth is satisfactory,
perform the following operations to uetermine if the fault
is in the motor or in the rack, tube and wheelbox assembly,
resulting in the motor being required to drive an excessive
load.
Running current
1. Perform 84.15.12 instructions 2 to 6.
2. Connect an ammeter suitable for the running current
(see data) in the supply circuit.
3. Allow the motor to run for 60 seconds. The ammeter
reading should then be as given in data for normal
speed and high speed respectively.
4. If the reading is not as stated, a fault in the motor is
indicated.
Running speed
5. Perform 84.15.12 instructions 2 to 6.
6. Allow the motor to run for 00 seconds. The speed of
the final gear should then be as given in data for
normal speed and high speed respectively.
7. If the speed is not as stated, a fault in the motor is
indicated.
Force to move rack in tube and wheelbox assembly
8. Perform 84.15.12 instructions 2 to 6.
9. Remove the wiper arms 84.15.01.
10. Attach a suitable spring scale to the hole in the
cross-head. The maximum permissible force to move
the rack is given in data.
II. If the required force is greater than stated, a fault in
the rack, tube and wheelbox assembly is indicated.
84.15.18 Sheet I
Triumph TR6 Manual. Part No. 545277 Issue I
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