mikej Posted June 17, 2021 Report Share Posted June 17, 2021 Anyone else had issues with new handbrake ratchet racks from Moss? (this would be TR4 as well) New one jams in the main lever tube at half way and is obviously a smaller radius then the original, teeth in different place, distance between the end holes different etc. Photo is an original bolted to a new one, the new one (top) has a greater arch and it's this that binds with the tuber inner surface. The new pawl is also not identical but works OK with the old rack. Although the engagement pointy bit is cut to a different angle than the rack teeth which presumably means it will wear quicker. MikeJ Quote Link to post Share on other sites
stuart Posted June 17, 2021 Report Share Posted June 17, 2021 Yes I had similar problem before, got my machinist to cut me a new one from an original. Stuart. Quote Link to post Share on other sites
ianc Posted June 17, 2021 Report Share Posted June 17, 2021 Have you reported this to Moss? If not, please do so because, if Moss don't know, then nothing will happen to address the problem. If you do not receive a satisfactory response, then raise a PQI report. Ian Cornish Quote Link to post Share on other sites
R.M. Posted June 17, 2021 Report Share Posted June 17, 2021 be interesting to hear what moss has to say. Quote Link to post Share on other sites
Ralph Whitaker Posted June 18, 2021 Report Share Posted June 18, 2021 I fitted one of these , but I did not have an original to compare. I found that the handbrake would not move the full distance, only about 6 clicks of the 9 tooth rack. I rectified it by grinding away a bit at the top, under the top hole, as it was fouling the lever. I can now see from the above photo that the original rack was more cut away at this same point. Have to say it now works OK after the mod. Ralph Quote Link to post Share on other sites
Bob Smith Posted June 18, 2021 Report Share Posted June 18, 2021 Mike, Sent you a PM about this problem Quote Link to post Share on other sites
stuart Posted June 18, 2021 Report Share Posted June 18, 2021 13 hours ago, ianc said: Have you reported this to Moss? If not, please do so because, if Moss don't know, then nothing will happen to address the problem. If you do not receive a satisfactory response, then raise a PQI report. Ian Cornish Yes probably 9yrs ago. Stuart. Quote Link to post Share on other sites
ianc Posted June 18, 2021 Report Share Posted June 18, 2021 I think MikeJ should report to Moss once again - and I feel sure that Ian Brown and Roger will note this as a possible PQI matter. Ian Cornish Quote Link to post Share on other sites
mikej Posted June 21, 2021 Author Report Share Posted June 21, 2021 Reported and now in the post. Another owner said he had reported it but had not returned it for some reason and did not get a refund. A quick scan of the parts books: Ratchet : 107631 is in BOTH TR2-3 and TR4 parts books. (I have an ex-TR4 ratchet and it is indeed the same as my early TR3 part). Pawl : 107632, ditto as Rack. Lever assy : 107637 in BOTH TR2-3 and TR4 parts books BUT another version of lever 131321 fitted to later TR4's. My parts list references a commission number for the change but it's blank. (so, what's the difference and is it relevent?) Importantly, lightly reprofiling the old rack's teeth with a Dremmel and squaring up the new pawl has fixed the problem of slipping of the top couple of teeth. I did ream out the pawl and lever hole so I could fit a 6mm hard steel pin, this fixed all the slop and keeps the pawl in the centre of the rack. Stay tuned! Mike Quote Link to post Share on other sites
Bob Smith Posted June 22, 2021 Report Share Posted June 22, 2021 Mike, The change to the lever assy from 107637 to 131321 reflected the change of the handbrake grip to the version with a push on method. The handbrake assemblies do inter change but only as complete assemblies so you could fit a late TR4 version to an early TR2 with no problems. Quote Link to post Share on other sites
mikej Posted July 9, 2021 Author Report Share Posted July 9, 2021 Thanks Bob, looking at my TR4 spare - the grip is indeed not screwed on. I have a nice chrome screw-on grip, one of many made by a Register member 30+years ago. PS..Moss have now issued a Credit Memo (what every that is) so implicitly acknowledging that the supplied rack was wrong. Quote Link to post Share on other sites
Upriis Posted June 9, 2023 Report Share Posted June 9, 2023 Same issue with this part not being correctly made. That’s now the second ratchet and pawl from the same supplier that has failed in less than 4000 miles. I managed to obtain a second hand original from Revingtons. When putting the original and remade parts together it is clear they are not even close to being the same. The new ones may work for an initial short period but the engagement between the pawl and teeth of the ratchet is less than 1mm, leading to accelerated wear and quick failure. …as this is a safety critical item, surely we should expect better from a major supplier? Left pawl New, middle second hand, right reground second hand top ratchet new, dark underneath ratchet original Quote Link to post Share on other sites
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