Triumph TR6 PI Operation Manual page 418

WINDSCREEN WIPERS AND WASHERS
WINDSCREEN WIPER SYSTEM
Data and description
Motor
Manufactuna
Type
Lucas Part No.: motor minus gear assembly
gear assembly - R.H. Steer
- L.H. Steer
Stanpart No.: motor minus gear assembly
gear assembly - R.H. Steer
- L.H. Steer
Running current - after 60 seconds from cold with
connecting rod removed:
Normal speed
High speed .
Running speed - final gear after 60 seconds from cold
with connecting rod removed:
Normal speed
High speed
Armature end-float
Brush length - normal speed: new
renew if less than
high speed: new .
renew if less than
earth:· new
renew if less than
Brush spring pressure - whe.n compressed so brush
bottom is aligned with brushbox slot end .
Maximum permissible force to move cable rack in
tubing - arms and blades removed
The unit consists of a two speed permanent magnet
motor and a gearbox unit which drives a cable rack
mechanism. Rotation
of
the motor armature is converted to
a reciprocating motion of the cable rack by a single stage
worm and gear, a connecting rod and a crosshead contained
in a guide channel.
Two speed operation is provided by a third brush.
When high speed is selected the positive supply is
transferred from the normal speed brush to the high speed
brush.
84.15.00 Sheet 1
84.15.00
Lucas
14W
75664
54702597
54702584
517621
517622
517646
1·5 amp
2·0 amp
46 to 52 rev/min
60 to 70 rev/min
0-002 to 0·008 in (0·05 to 0·02 mm)
0·380 in (9·65 mm)
0·180in (4"76 mm)
0·380 in (9·65 mm)
0·280 in (7·11 mm) (i.e. when narrow section is worn to
step into full-width section)
0·380 in (9·65 mm)
0·180 in (4·76 mm)
5 to 7 oz (140 to 200 g)
6lb (3 kg)
A . switching feature stops the blades in the park
position irrespective of their position when the fascia
switch is selected off. This is effected by a two stage limit
switch unit attached to the gearbox. The contacts are
actuated by a cam on the final gear.
When the fascia switch is selected off the motor will
continue to run until the limit switch first stage contact:
open. A momentary period follows during which no
contact is made. The second stage contacts then close
causing regenerative braking of the armature which
maintains consistent parking of the blades.
Triumph TR6 Manual. Part No. 545277 Issue 1