Roger1707821911 Posted October 27, 2020 Share Posted October 27, 2020 Was running my R3619 Castle class (DCC) when. for no apparant reason it slowed down and cam to a standstill.Switching to another loco on the same track on my Select and all was well.Returning to the Castle, I can hear the motor speed up and slow down in synch with the Select speed control but there is no drive to the wheels..... just the sound of the motor.I,m distraught !!!Roger (Chalford) Link to comment Share on other sites More sharing options...
walkingthedog Posted October 27, 2020 Share Posted October 27, 2020 Sounds as if either the motor has come adrift so the drive cogs aren't meshing or one of the cogs is slipping on its shaft/axle. Link to comment Share on other sites More sharing options...
ColinB Posted October 27, 2020 Share Posted October 27, 2020 Probably the motor has moved backwards and disengaged with the intermediate gear, it happened with my King. Take the loco body off and you will see what is wrong. I don't know on this one how the motor is held in but it might just be a case of clipping it back in. Link to comment Share on other sites More sharing options...
Going Spare Posted October 27, 2020 Share Posted October 27, 2020 If you can hear the motor running, one or more of the gears in the train taking the drive from the motor to the wheels has come out of mesh, broken or is spinning on the shaft to which it should be attached. Can you turn the driving wheels by hand? You will have to take the body off and check the integrity of the gears - Service Sheet 346C and the loco's Maintenance Sheet should help. Link to comment Share on other sites More sharing options...
Roger1707821911 Posted October 27, 2020 Author Share Posted October 27, 2020 If you can hear the motor running, one or more of the gears in the train taking the drive from the motor to the wheels has come out of mesh, broken or is spinning on the shaft to which it should be attached. Can you turn the driving wheels by hand? You will have to take the body off and check the integrity of the gears - Service Sheet 346C and the loco's Maintenance Sheet should help. Yes I can turn the wheels manually Link to comment Share on other sites More sharing options...
Going Spare Posted October 27, 2020 Share Posted October 27, 2020 If the wheels were linked correctly to the motor via the gears, that should not be possible so proceed as per the posted suggestions to determine the cause. Link to comment Share on other sites More sharing options...
walkingthedog Posted October 27, 2020 Share Posted October 27, 2020 3 similar answers at 2 minute intervals. 😆 Link to comment Share on other sites More sharing options...
Roger1707821911 Posted October 27, 2020 Author Share Posted October 27, 2020 Update...re Service sheet 346C....The bevel gear on the motor shaft is not engaging with the two gears that it is supposed to drive.The shaft gear appears to be too high to engage the driven gears Link to comment Share on other sites More sharing options...
walkingthedog Posted October 27, 2020 Share Posted October 27, 2020 The motor has obviously come adrift. The parts that hold it in place are held in place using screws. See if you can find the offending part. Link to comment Share on other sites More sharing options...
Roger1707821911 Posted October 27, 2020 Author Share Posted October 27, 2020 The motor has obviously come adrift. The parts that hold it in place are held in place using screws. See if you can find the offending part. The motor seems to be squarely seated in its metal seating...nothing appears loose or missing Link to comment Share on other sites More sharing options...
walkingthedog Posted October 27, 2020 Share Posted October 27, 2020 Is the worm gear on the motor shaft too high to mesh with the gear wheel. It only takes a mm to stop them meshing. Link to comment Share on other sites More sharing options...
Roger1707821911 Posted October 27, 2020 Author Share Posted October 27, 2020 Is the worm gear on the motor shaft too high to mesh with the gear wheel. It only takes a mm to stop them meshing.yes indeed..that appears to be the crux of it Link to comment Share on other sites More sharing options...
Going Spare Posted October 27, 2020 Share Posted October 27, 2020 If the motor is correctly positioned in its mounts and the mounts themselves are correctly secured to the chassis block, have the teeth on the top transfer gear been worn away denying meshing with the worm on the motor shaft? Link to comment Share on other sites More sharing options...
walkingthedog Posted October 27, 2020 Share Posted October 27, 2020 Looks like it is held by three screws. The bottom one appears to be under the motor. Link to comment Share on other sites More sharing options...
Roger1707821911 Posted October 27, 2020 Author Share Posted October 27, 2020 If the motor is correctly positioned in its mounts and the mounts themselves are correctly secured to the chassis block, have the teeth on the top transfer gear been worn away denying meshing with the worm on the motor shaft?I wouldnt think they are worn..its only had about 40 minutes total running time.Its odd that it just started so suddenly Link to comment Share on other sites More sharing options...
Going Spare Posted October 27, 2020 Share Posted October 27, 2020 If the gear does not have worn teeth and is out of mesh with the worm on the motor shaft, the motor (or the forward end of it) must have moved upwards. Have you taken the motor out of its mounts to physically check its positioning and the fastening of the lower mount to the chassis block? A screw may have gradually slackened until meshing was lost. Link to comment Share on other sites More sharing options...
atom3624 Posted October 27, 2020 Share Posted October 27, 2020 It should be an easy fix, but is unusual.The mount underneath the motor screws into the chassis - this would be 'the suspect' but unusual, as mounting also relies on the encasing mount which goes over the motor, and is secured elsewhere. To move out, there's the end-plate which could work loose as well. My concern is that the metal worm could have caught the gears, badly meshed and damaged them.If it's not obvious, with the HSS346C in front I would carefully dismount and reassemble the gears and motor drive - including end-plate. Good luck. Al. Link to comment Share on other sites More sharing options...
Roger1707821911 Posted October 27, 2020 Author Share Posted October 27, 2020 Thanks Going Spare and atom3624 and everyone who helped.I have found the problem..... the gear on the axle of the centre driving wheels was off its spline,I have pushed it back onto the spline with a tine drop of thread-locker......Now its a matter of re-assembly..... easier said than done with my poor dexterity/eyesight Roger (Chalford) Link to comment Share on other sites More sharing options...
Going Spare Posted October 27, 2020 Share Posted October 27, 2020 Good to hear you got to the bottom of it. Link to comment Share on other sites More sharing options...
atom3624 Posted October 28, 2020 Share Posted October 28, 2020 Great news.Good that you took time to secure it. Are the gears OK, the worm hasn't caught them with the 'revving'? Al. Link to comment Share on other sites More sharing options...
walkingthedog Posted October 28, 2020 Share Posted October 28, 2020 Glad you have sorted it. Link to comment Share on other sites More sharing options...
Going Spare Posted October 28, 2020 Share Posted October 28, 2020 What bugs me, though, is that the worm and top gear were not meshing. Did repositioning the axle gear reinstate that? I would not have expected there to be sufficient vertical play in the gear tower for that to happen. Link to comment Share on other sites More sharing options...
walkingthedog Posted October 28, 2020 Share Posted October 28, 2020 If the top gear has moved to one side it wouldn't mesh with the worm. Link to comment Share on other sites More sharing options...
ellocoloco Posted October 28, 2020 Share Posted October 28, 2020 @Chalford When you moved the axle gear back into position and secured it with thread locker, did you notice if the gear was split? A split gear may explain why it has been pushed along the axle and out of alignment with the rest of the transmission. If that is the case, its unlikely that thread locker will provide a permanent fix and the axle gear will need replaced. Link to comment Share on other sites More sharing options...
Going Spare Posted October 28, 2020 Share Posted October 28, 2020 WTD - Roger Chalford reported it was the gear on the centre driving wheel axle that had moved. Link to comment Share on other sites More sharing options...
Recommended Posts
Please sign in to comment
You will be able to leave a comment after signing in
Sign In Now