AlanT Posted January 2, 2016 Report Share Posted January 2, 2016 Just had a bloke buy a DR2 motor from me. It turned out he wants this for a 1959 TR3A. My head says that TR3A uses a DR3A motor. But things are not always this simple. Any help wpuld be appreciated. Al. Quote Link to post Share on other sites
RobH Posted January 2, 2016 Report Share Posted January 2, 2016 My October '59 3A certainly has a DR3A motor Alan. Quote Link to post Share on other sites
Ian Vincent Posted January 2, 2016 Report Share Posted January 2, 2016 My 1959 TR3a (December) has a DR2 motor. What is the difference between a Dr2 and a DR3a motor? Rgds Ian Quote Link to post Share on other sites
AlanT Posted January 2, 2016 Author Report Share Posted January 2, 2016 (edited) Thanks for two speedy and helpful replies. Early DR2: Late DR2: DR3A Different gear-wheel. There is a long story about this. Notice that the DR3A has a bigger gear-wheel which, at first sight, should mean it rotates slower. DR2 does 33 rpm. DR3A does 45 rpm Really! This puzzled me for a while. The armatures both rotate at the same speed. So "How do they do this?". Edited January 2, 2016 by AlanT Quote Link to post Share on other sites
peejay4A Posted January 2, 2016 Report Share Posted January 2, 2016 Different pitch worm gear/wheel teeth? Quote Link to post Share on other sites
BlueTR3A-5EKT Posted January 2, 2016 Report Share Posted January 2, 2016 (edited) Now the Lucas details, from the books I have, for the single speed wiper motor models and the pt nos:- TR3 Models 57 - DR2 Lucas 75200 59 - DR2 Lucas 75296 60/61/62 DR2 Lucas 75371 DR3 was the two speed motor option for TR3 according to Lucas. TR4 Models 62 - DR3A Lucas 75452 I would say that DR3A was never a fitment (according to Lucas) to the TR3/3A/3B models So, for originality..... what I think is correct for the 59 car is a DR2 motor (single speed) with screwed electrical connectors (DR2 Early Type pictured above) unless the car has been modified to the later Lucar connector wiring loom (DR2 Later Type) - For originality the commision no of the car needs to be known. DR2 is certainly the only wiper motor type in TR3/3A cars I have owned or been in contact with. Cheers Peter W Edited January 2, 2016 by BlueTR3A-5EKT Quote Link to post Share on other sites
AlanT Posted January 2, 2016 Author Report Share Posted January 2, 2016 (edited) I like to discourage use of the early-type self-parker. The contact design is awful and tends to break off. When they do break off they are really hard to fix. The new type is simple, robust and an easy fix. I discovered a photo: That bit of Beryllium-copper takes quite a beating and if anything goes wrong they get torn off. Need careful adjusting. Edited January 2, 2016 by AlanT Quote Link to post Share on other sites
Ian Vincent Posted January 2, 2016 Report Share Posted January 2, 2016 Mine has screwed electrical connectors. Rgds Ian Quote Link to post Share on other sites
AlanT Posted January 2, 2016 Author Report Share Posted January 2, 2016 On the left the DR2, on the right the DR3A. Big wheel, more teeth but runs faster. Hurt my head for a while. Quote Link to post Share on other sites
RobH Posted January 2, 2016 Report Share Posted January 2, 2016 Double-start helix on the worm? Quote Link to post Share on other sites
AlanT Posted January 2, 2016 Author Report Share Posted January 2, 2016 (edited) RobH you are a proper engineer and win the prize. There is a strange consequence of this. If you jam a DR2, the armature will stop and probably burn out. But if you jam a DR3A the worm can skip over the wheel teeth a bit. This probably saves them burning out. I don't know if this was deliberate or not. But this little gadget really does stop burnt-out armatures: and they are marked "For DR2". The two-speed DR3As like to burn out the field coil if you miswire them. Edited January 2, 2016 by AlanT Quote Link to post Share on other sites
Nigel C Posted January 8, 2016 Report Share Posted January 8, 2016 DR3 was the two speed motor option for TR3 according to Lucas. I didn't know they had a two speeder on the TR3... I have fitted (well my mate did cus he's all things electrical...I'm just all duzzzzits bang!) a two speeder on my car but to operate it we had to use a later toggle switch which looks real out of place.If they did this for a 3 then I could possibly get a pull switch to do the same thing??? Quote Link to post Share on other sites
Don Elliott Posted January 9, 2016 Report Share Posted January 9, 2016 My wiper motor is the original 2-speed one that came with my TR3A when I bought it brand new in 1958. It is made by Lucas. The two speeds are "SLOW" and :STOPPED". LOL Don Elliott Quote Link to post Share on other sites
AlanT Posted January 9, 2016 Author Report Share Posted January 9, 2016 Happy New Year Don. Thanks for the photo. That's an early DR2. You are right, they are SLOW. 33 rpm. Nice to hear from you again. Al. Quote Link to post Share on other sites
Dave Larnder Posted January 9, 2016 Report Share Posted January 9, 2016 Alan No comment from me this time. Last time I had to apologize to you and Steve Hunt. Mine if you remember was wound for 24Volts and went like hell. Dave Quote Link to post Share on other sites
stuart Posted January 9, 2016 Report Share Posted January 9, 2016 DR3 was the two speed motor option for TR3 according to Lucas. I didn't know they had a two speeder on the TR3... I have fitted (well my mate did cus he's all things electrical...I'm just all duzzzzits bang!) a two speeder on my car but to operate it we had to use a later toggle switch which looks real out of place.If they did this for a 3 then I could possibly get a pull switch to do the same thing??? The two speed switch is the same type as the light switch. Stuart. Quote Link to post Share on other sites
BlueTR3A-5EKT Posted January 10, 2016 Report Share Posted January 10, 2016 The two speed switch is the same type as the light switch. Stuart. I thought TR2-3 light switch makes the motor go .... off - fast - slow TR4-MGB headlamp switch is the same item as TR4A two speed wiper switch. Lucas double pull thing that will accept orig knob. - Is there enough space behind the switch panel - Lucar terminals do not touch the heater ? I use a Range Rover Mk1 tailgate wiper/wash switch - turn for on, push to wash switch on my TR3 with orig heater. Peter W Quote Link to post Share on other sites
Lebro Posted January 10, 2016 Report Share Posted January 10, 2016 You can fit a TR light switch in the place of the wiper switch, but the hole needs to be slightly enlarged. I did this not for two speed wipers, but for screen washers on the 2nd pull. Bob. Quote Link to post Share on other sites
Nigel C Posted January 10, 2016 Report Share Posted January 10, 2016 aaar, I think I might be out on this one as my two mates fitted a different/modern wiper motor (from poor memory) and a standard switch wouldn't operate it...I was in on the discussions they had at the time but it made absolutely no sense to me! I will try and find out what the motor was (can't really see it on my car as it sits in the depths of the inner nearside wing). Is this the switch Peter? http://www.holden.co.uk/displayproduct.asp?pCode=34477 The speeds are ok I guess, nothing to write home about but in hindsight If I had known about the switch problems I don't think I would have bothered...and it would have saved me a load of beer too! I've used a double switch on the heater for the washers and at some point I will "double up" the panel light switch so I can switch the interior/footwell lights on the second pull. Quote Link to post Share on other sites
BlueTR3A-5EKT Posted January 10, 2016 Report Share Posted January 10, 2016 aaar, I think I might be out on this one as my two mates fitted a different/modern wiper motor (from poor memory) and a standard switch wouldn't operate it...I was in on the discussions they had at the time but it made absolutely no sense to me! I will try and find out what the motor was (can't really see it on my car as it sits in the depths of the inner nearside wing). Is this the switch Peter? http://www.holden.co.uk/displayproduct.asp?pCode=34477 The speeds are ok I guess, nothing to write home about but in hindsight If I had known about the switch problems I don't think I would have bothered...and it would have saved me a load of beer too! I've used a double switch on the heater for the washers and at some point I will "double up" the panel light switch so I can switch the interior/footwell lights on the second pull. If we talking Peerless here.... Yes I think that is the one Nigel - It should work the original type Lucas square bodied wiper motor on a TR4A. <<Anorak time - By part no it is wrong - It should be Lucas 35521 rather than Lucas 34477, but I suspect the difference is the bezel, rather than the switch.>> If you have the later Lucas fitment (TR6, Defender etc) round bodied motor you will need a different switch entirely - plus different wheel boxes to get the wipe right, and lots of wiring as the power starts from the switch, not the motor as the original fitment does. Look at and compare the wiring diag for TR5 (3 terminal switch) and TR6 (4 terminal switch) to see the differences and power route. On your Peerless the switch does the earthing, on a TR6/Defender the motor does the earthing. Cheers Peter W Quote Link to post Share on other sites
stuart Posted January 11, 2016 Report Share Posted January 11, 2016 I thought TR2-3 light switch makes the motor go .... off - fast - slow TR4-MGB headlamp switch is the same item as TR4A two speed wiper switch. Lucas double pull thing that will accept orig knob. - Is there enough space behind the switch panel - Lucar terminals do not touch the heater ? I use a Range Rover Mk1 tailgate wiper/wash switch - turn for on, push to wash switch on my TR3 with orig heater. Peter W Depends on which way you wire it, 4a wiper switch does that , you probably could fit that switch behind the dash but the bezel thread size is different I think. Stuart. Quote Link to post Share on other sites
Nigel C Posted January 15, 2016 Report Share Posted January 15, 2016 So finally got to the wiper motor but as you can see very poor image. I do have a "non standard" header tank in there as well so there's not a lot of room to get my camera phone in. I have been told P6 rover as this has two speed settings + push for wash. also just seen these on ebay http://www.ebay.com/itm/Volvo-1800-P1800-1800S-P1800S-Lucas-Headlight-Wiper-Fan-Switches-/172060116399?hash=item280f9505af:g:bxgAAOSwHaBWlTtr&vxp=mtr but I'm not paying 100 bucks! I have friends with P1800 so might see if I can test one, see if it will do the job? Quote Link to post Share on other sites
AlanT Posted January 16, 2016 Author Report Share Posted January 16, 2016 Looks like a 2-speed 14W motor as on TR6. Stuart will tell you how to switch these. It's different to an early motor because of the self-parking method. Quote Link to post Share on other sites
BlueTR3A-5EKT Posted January 16, 2016 Report Share Posted January 16, 2016 (edited) Take a look at these diagrams - there is one in there for the 2 speed 14w Motor Ring them and ask what switch the suggest for the 14W motor - They are in Bromyard Peter W links http://www.holden.co.uk/wiringDiagrams.asp http://www.holden.co.uk/displayproduct.asp?pcode=040.151 Nigel This could be the solution. http://www.carbuildersolutions.com/uk/2-speed-rotary-wiper-switch this one will do electric screen wash too http://www.roversnorth.com/ProductDesc.aspx?code=PLE809 Peter W Edited January 16, 2016 by BlueTR3A-5EKT Quote Link to post Share on other sites
Nigel C Posted January 17, 2016 Report Share Posted January 17, 2016 Hi Peter, Thanks for the the info. I have a mate that deals in all sorts of Land rover spares so I could ask him, see what he's got. I Have used Car Builder Solutions before, they are really helpful on the phone (cant think why I didn't ask them when we were fitting it!) and I think I might be able to fudge an original type knob onto that newer switch shaft? This will go on the back burner for a bit as during some routine maintenance (wanton mindless fiddling) I found play in the N/S/F hub...a lot of play to be honest Machining time me thinks. Which rests my case for MOT's! I like to think I keep up with the car and its needs but I hadn't felt anything untoward with the front end but a little alarmed at what I found. BP doesn't need an MOT but always gets one. (which it was heading towards shortly) Quote Link to post Share on other sites
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