AlanT Posted October 8, 2015 Report Share Posted October 8, 2015 (edited) Take the end-cap off the wiper motor and check the carbon-brushes. This bloke was lucky: Once the arms reach the copper segments the motor is beyond economic repair. New armatures are £85 and even rough motors are now worth £50. New brushes are between £5 and £10. Edited October 8, 2015 by AlanT Quote Link to post Share on other sites
Richardtr3a Posted October 8, 2015 Report Share Posted October 8, 2015 Do you have to fit the new brushes into the existing arms? Richard & H. Quote Link to post Share on other sites
tim hunt Posted October 8, 2015 Report Share Posted October 8, 2015 No Richard. Some years ago I obtained new brushes for my DR3 at the Stoneleigh Show as part of a complete overhaul of the wiper system. They were NOS and came in a Lucas package complete with new arms and springs. Tim Quote Link to post Share on other sites
AlanT Posted October 8, 2015 Author Report Share Posted October 8, 2015 You can fit new arms. Normally the old ones are seviceable and you just pop in new carbon. I clean the arms in Silver-Dip but this is not vital. Check also the small spring is not about to disintegrate. Prone to rust of course. Do anything rather than run out of carbon. The armature segments are only about 1mm thick and the old practise of skimming them in a lathe is not likely to succeed. Quote Link to post Share on other sites
TR5tar Posted October 8, 2015 Report Share Posted October 8, 2015 Thanks Alan, tips like these are great. I know what I'll be at tomorrow. Perhaps we should have a tip of the week section! Darren Quote Link to post Share on other sites
AlanT Posted October 9, 2015 Author Report Share Posted October 9, 2015 (edited) Should look like this: Note the position of the red fibre-retainer. This are easy to loose/forget. Also the grooves in the carbon go tangential to the commutator, not axially. If you take the arms off, then be careful that the spring does not release from the T-pieces. Dropping these T-pieces is a nightmare. I do have spares if you goof up! I'm pleased with the crinkle finish I am putting on these now, by the way. This is a good source of carbon-brushes. http://www.ebay.co.uk/itm/Lucas-DR2-DL2-DR3-6W-Pair-Classic-Car-Wiper-Motor-Brushes-508170-17H5396-/191278301758?hash=item2c8913423e The ebay search string to bring up more suppliers is: lucas wiper brush Edited October 9, 2015 by AlanT Quote Link to post Share on other sites
glasgow4a Posted October 9, 2015 Report Share Posted October 9, 2015 Arms and brushes look same as mk1 mini, am I correct,Ian. Quote Link to post Share on other sites
Don H. Posted October 9, 2015 Report Share Posted October 9, 2015 So the red fibre-retainer in your first photo is installed incorrectly, Alan? Quote Link to post Share on other sites
RogerH Posted October 9, 2015 Report Share Posted October 9, 2015 (edited) Hi Don, in the first pic there are two red fibre plates. in the second there are is a red fibre and black plate (I think) So the lower red plate is correct in both (I think) Roger Edited October 9, 2015 by RogerH Quote Link to post Share on other sites
AlanT Posted October 9, 2015 Author Report Share Posted October 9, 2015 (edited) Spot on Roger. You can't assemble these wrongly. The top one is rivetted in place. You can just forget or loose the bottom one. Not a lot happens if you do. The arms can wiggle about a bit and the commutator makes a buzzy sound. But it runs and stays together. You can see the loose red bit in the bag here: They are a funny shape, quite easy to break and hard to find as spares. This brush gear is identical on all the motors used on TR's except the TR6. Even the early CRT motors use them. But they are getting hard to find. If you wind up like this you will need more than a spare arm: Better designed motors loose electrical contact before they run out of carbon. These just keep going until they tear themselves up. Edited October 9, 2015 by AlanT Quote Link to post Share on other sites
Dave Larnder Posted October 9, 2015 Report Share Posted October 9, 2015 Hi Alan et al. Steve Hunt is the guru on windscreen wiper motors, he did mine great. steve@stevehunt.demon.co.uk 7885 186111 E-Bay - tankard03. Dave Quote Link to post Share on other sites
Don H. Posted October 9, 2015 Report Share Posted October 9, 2015 Alan's writeups on Lucas wiper motors over the last few years have been most interesting and informative. I'd say he's a guru, too! Quote Link to post Share on other sites
stillp Posted October 9, 2015 Report Share Posted October 9, 2015 Thanks Al. Ordered some brushes. My self-parking contact looks pretty well worn too. Pete Quote Link to post Share on other sites
AlanT Posted October 9, 2015 Author Report Share Posted October 9, 2015 (edited) I got a good laugh from the above post. Not only did I work out that Dave had a 24V field coil, making his motor go too fast, I told him to get a new coil from Steve Hunt. It's quite right though, that Steve has a big stock of spares and not only wiper stuff. He does motors of all types. I do those that suit TR's, like this 4A 2-speed: Steve's wife trades in leather goods and makes the most superior trouser belts. I have worn one every day for about 8 years and its like new. http://theleatherworker.com/index.php?langcd=en&page=defaulttpl&subpage=aboutus Edited October 9, 2015 by AlanT Quote Link to post Share on other sites
Dave Larnder Posted October 10, 2015 Report Share Posted October 10, 2015 Hi Alan I had forgotten who had sorted out my rather fast wiper speed, so sorry for that and thanks again. Dave Quote Link to post Share on other sites
AlanT Posted October 10, 2015 Author Report Share Posted October 10, 2015 On a 4/4A you can get the end-cap off without removing the motor from the car. I need to find out if this is also easy/possible on a 2/3/3A. In other words is the motor mounted so that you get easy screwdriver access to the rear end. You will also need a couple of inches to withdraw the long bolts that hold it all together. Quote Link to post Share on other sites
stuart Posted October 10, 2015 Report Share Posted October 10, 2015 On a 4/4A you can get the end-cap off without removing the motor from the car. I need to find out if this is also easy/possible on a 2/3/3A. In other words is the motor mounted so that you get easy screwdriver access to the rear end. You will also need a couple of inches to withdraw the long bolts that hold it all together. It is also possible on a 5 as they use the same motor. 3/3a motors can also be done though an original TR2 motor isnt quite so easy. Stuart. Quote Link to post Share on other sites
AlanT Posted October 10, 2015 Author Report Share Posted October 10, 2015 Thanks Stuart, was hoping you would be along. Of course, the CRT motors have a fiddly plasctic end cap. I must remember to take some photos of how you do it with these. Good job I have one. Also thanks for reminding me that 5's use the DR3A also. Quote Link to post Share on other sites
graeme Posted October 10, 2015 Report Share Posted October 10, 2015 Also thanks for reminding me that 5's use the DR3A also. And TR250s too. Graeme Quote Link to post Share on other sites
stillp Posted October 26, 2015 Report Share Posted October 26, 2015 Well, anticipating a rush from readers, I ordered some brushes. Took the end cap off the motor today (mustn't rush these things) only to find the comm in perfect condition, and the brushes aren't even worn down to the base of the serrations. Good tip though Al, thanks. Pete Quote Link to post Share on other sites
stuart Posted October 26, 2015 Report Share Posted October 26, 2015 Well, anticipating a rush from readers, I ordered some brushes. Took the end cap off the motor today (mustn't rush these things) only to find the comm in perfect condition, and the brushes aren't even worn down to the base of the serrations. Good tip though Al, thanks. Pete You obviously dont use the car in the rain enough! Stuart. Quote Link to post Share on other sites
stillp Posted October 26, 2015 Report Share Posted October 26, 2015 I don't use enough, full stop! Pete Quote Link to post Share on other sites
RogerH Posted October 26, 2015 Report Share Posted October 26, 2015 Get out there and drive it - yesterday and today were beautiful. Roger Quote Link to post Share on other sites
monty Posted October 27, 2015 Report Share Posted October 27, 2015 Get out there and drive it - yesterday and today were beautiful. Roger Yes Roger, we had a great drive out on Sunday for a lunch & 'trash'! Quote Link to post Share on other sites
RogerH Posted October 27, 2015 Report Share Posted October 27, 2015 ....trash !!!! Roger Quote Link to post Share on other sites
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