90 Windscreen wipers

Nige wrote:

Assuming that the arms are properly connected to the wheelbox outputs
and that the drive adaptors are properly attached to the wheelbox output
shafts ... someone has fitted a wiper motor with a reduced output stroke
or components therein that give that effect.

Disconnect the motor and manually move the rack to see if the situation
is resolved and then work back to the motor from there. If you can't get
the required stroke start thinking about wear/lost teeth on the rack or
the wheelbox gears. I don't think that any different ratios exist for
the wheelboxes but I may be wrong.

I'm not sure - I think you're right about the wheelboxes, but I'm pretty
sure the arcs are different for SIII and Defenders.

The motor is slowly dying on mine - temporarily cured with a bit of
fettling in the summer, but it was doing similar funny things (not
parking, etc.). Joe Lucas, Prince of Muddy Windows?

I stripped the motor down, cleaned the commutator and fettled the
brushes, then greased/oiled everything I could get at without removing
the dash entirely. I think a new parking switch was something
extortionate like £4. It plugs into the side of the motor body. The
result of a good clean plus grease plus the switch was that I got back
two speeds, and the self-parking, which was a result. I do remember it
being a bit of a fiddle though. A replacement motor isn't that
expensive, and I got one initially, but returned it without fitting it
when I noticed that you can change the brushes/plate on the originals,
but not Britpart replacements (it was something like that, anyway - you
can't service the pattern ones properly).

There's somebody who sells brush sets for them too. Will dig around in
my bookmarks file.

[later]

FOUND IT!

Windscreen Wipers. 29. Windscreen Wiper Motor. Lucas Type DR2 ... Note
the brush gear and parking switches are specific to early and late
motors, ...
somerford-mini.co.uk/pdfs/Catalogues/Electrical-Inst/12-Windscreen-Wipers
.pdf

Stafford Vehicle Components - Windscreen wipers
Copy of the Lucas Pump Used 1960's - 1980's, £12 each + £4 P&P. WIPER
MOTOR 14W Brush & Mounting plate assembly, £9 each + £2.50 P&P. WIPER
PARK SWITCH 14W ...
www.s-v-c.co.uk/prod_wipers.html

HTH,

S.

--
SimonM
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SpamTrapSeeSig wrote:

With only one ratio of wheel box the arc is controlled by the output
gear (position of rack drive pin) on the motor which then varies the
stroke of the rack.

Dougal wrote:

IMS they're interchangeable, someone's put one in that has a smaller
throw!

--
GbH

Wisdom and experience come with age, they say, but I do wish I could
remember the darn question

Google is your friend.. look...



.. the generally accepted size of the ark is 155 metres long, 25 metres wide
and 15 metres high and it was to contain three decks, a side-opening door
pair and a one-cubit square window at the top. ..










. It is of particular interest to speculate how Noah would have housed and
fed the 10 000 known species of termites on his wooden ark. .










. Although Noah had three sons who may have willingly helped him with the
building chores ..These four were required to acquire boat-building skills,
acquire tools, negotiate the rights or acquire a forest in an arid area,
harvest the 'gopher wood' forests, transport monstrous logs from the forest
to the boat-building site, season the timber over a number of years such
that it would not rot or split, cut the timber, build docks, scaffolds arid
workshops, build a vessel of very large heavy planks plus a maze of cages of
variable size, shape and design, collect tonnes of pitch and caulk the boat,
and finally, gather provisions for the millions of known and unknown
organ­isms who had cruise tickets. . Recently I asked Halvorsens, a Sydney
boat-­builder, to provide me with an estimate of the building time for a
work force of four for a boat of this size. . if Noah arid his four willing
labouring sons were to attempt such a task some 4000 years ago, then they
would still be building the vessel! The building task would be slightly
com­pounded by the fact that some of the earlier craftsmanship would have
rotted away. ..










.. The total amount of water carried for the animals would have sunk the
ark, the total weight of provisions would have sunk the ark, the total
weight of vertebrates would have sunk the ark many times, the amount of
excreta generated would have sunk the ark every five days and the aquarium
for a pair of whales genus, would have sunk the ark many times. Furthermore,
if a couple of the large animals had the urge to procreate, the ark would
become terribly unstable. Imagine if the two 80-tonne Ultrasaurus dinosaurs
converted the snaking stinking sinking overcrowded freighter into a love
boat. The ark would have capsized! .










. On the assumption that the animals came on two by two (and not seven
pairs), each animal would have some 1150 cubic centimetres (i.e. the volume
of a milk carton) of shipboard space for living the 371 days at sea. ..










. Noah and his family would have shared this tiny ark with 30 million pairs
of known and extinct organisms. . The Bible tells us that all organisms were
loaded in a 24-hour day (Genesis 77:11-15) thereby requiring 460 organisms
per second to enter the ark over this period. .










. Noah .had to decide which humans were going to carry the diseases which
only occur in humans. Humans are the only host for numerous diseases
including measles, pueumococcal pneumonia, typhus, typhoid fever, smallpox,
leprosy, poliomyelitis, five types of syphilis and gonorrhoea, AIDS,
hepatitis, shingles, four types of rnalarial par­asites, two types of
tapeworm, an intestinal worm, hookworm, three agents of filariasis, two
species of Schistosoma, pinworm, three types of lice, various types of fever
(for example, Japanese river fever), kuru, just to mention a few. The
disease kuru only occurs in the highlands of Papua New Guinea. . Poor Noah.
Which family member did he instruct to go and pick the brains of a kuru
sufferer so that the natives of the highlands of Papua New Guinea can enjoy
the disease today? Which one of his family did Noah instruct to seduce a
syphilitic in order to pre­serve the disease for the benefit and
transmission by post-flood hominids? How did Noah stop every, one of his
family from catch­ing highly infectious diseases such as typhoid fever,
cholera, yellow fever and malaria? ....






. The magnitude of the feeding task is astronomical. If the crew of four
males worked 24 hours a day for the 371 days at sea, then each animal would
have received a total of six seconds of attention for the whole year. In the
six seconds, the animals would have to be fed and watered at least 3 7/1
times and presumably the stalls had to be cleaned in order to avoid an
outbreak of disease. Such animal­ care activities by an incredibly diseased
crew who would undertake these shipboard duties in darkness below decks on a
wildly lurching, grossly overcrowded, unstable leaking ark defies credulity.






. Assuming that the daily feeding, watering and excercising of 30 million
pairs of organisms was carried out with diligent success, the less pleasant
duty of the disposal of mountainous volumes of urine and excreta was a daily
chore for the crew. . The overworked crew would have to bucket all the waste
fluids and solids from below decks and dispose of it overboard. It is a
little difficult to calculate the volume of excreta generated by extinct
animals, however even the most basic calculations show that thousands of
tonnes of urine and excreta were generated on a daily basis by those
unwilling passengers. We must remember, that the ark had a ' ventilation
port of one cubit square so the atmosphere below decks was' obviously
indescribably fetid. . When one looks at moderately frequent spontaneous
combus­tion of methane in well-ventilated coal mines, one wonders how Noah
avoided the spontaneous combustion of the monstrous volumes of a
methane-oxygen mix below decks. Such an explosion would totally fragment the
unstable leaking overcrowded ark if the organisms on the ark had not already
died from suffocation, res­piratory disease and outbreaks of every
conceivable pathogen. ..

Does that help?







Ohhh ARC!



Can't help  ;0)



Lee D

Lee_D wrote:

Through which the rain dripped onto the various pairs of animals, 40
days and 40 nights it dripped, should've cleaned out the drains!

--
GbH

Wisdom and experience come with age, they say, but I do wish I could
remember the darn question

"Nige"  wrote

If you mean the wipers move over the whole arc but only clean the top bit
then suspect the springs in the arms or the arms themselves.
Cheap as chips anyway.
If they only move over a small arc in the centre then you have a motor/rack
problem.

--
Regards
Bob Hobden
1986 90 Utility 2.5 petrol

The pivot on my arms had stiffened to the point at which the springs
couldn't force contact any more, just oiling and working the pivots a bit
made a world of difference.

--
Blast off and strike the evil Bydo empire!
http://youtube.com/tarcus69
http://www.flickr.com/photos/tarcus/sets/

Same here, but as mentioned, I had to sort the motor too. One of those
rare jobs for WD40 - at least to start with.

--
SimonM
                            ----- TubeWiz.com -----
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