Stormbringer Posted December 28, 2018 Share Posted December 28, 2018 (edited) Hi all, last night for the first time I put my all over green DP2 on a layout to find that there was something seriously wrong somewhere. Having seemed ok on a rolling road , last night it would barely move and opening the controller up would make the motor run faster but this wasn't being sent down to the wheels. Also having removed the fuel tank and the screws underneath I still can't get the body off. I have some folded bits of paper that I hope have covered the lugs(?) but still the body doesn't want to come off. Does anyone (a) have any pics of one with the body off? and (b) any idea what the problem might be? The loco was purchased second hand. TIA Pete Edited December 28, 2018 by Stormbringer Link to post Share on other sites More sharing options...
34theletterbetweenB&D Posted December 28, 2018 Share Posted December 28, 2018 Your fault description says 'no drive to one bogie'. That's usually the plastic drive coupler seated in a flywheel slipping. The result on track is that bogie still getting drive struggles to move the bogie on which the wheels will not turn. Easy to fix once inside, with a dab of cyano to resecure the drive coupler in the flywheel. No experience with this particular model, but Heljan's body shells are often on very tight at first removal attempt, you simply have to keep working away at peeling the body side away from the cast block and holding it off with slices of old credit card. Haven't broken one doing this - yet... 1 Link to post Share on other sites More sharing options...
Stormbringer Posted December 28, 2018 Author Share Posted December 28, 2018 Having finally got the body off and put the chassis back on the rolling road it seems that both drive shafts are rotating but the drive isn't going down through the tower if you know what I mean. Pete Link to post Share on other sites More sharing options...
Stormbringer Posted December 28, 2018 Author Share Posted December 28, 2018 Pics of DP2 in bits. Should the dcc blanking late be sitting at that angle? I've added tiny blobs of paint to the drive shafts to be sure that they rotate. Watch this space. Pete Link to post Share on other sites More sharing options...
Stormbringer Posted December 28, 2018 Author Share Posted December 28, 2018 I was wrong the drive shaft in the second pic isn't moving at all. So now I need to get the motor or bogie out. Any Ideas anyone? Pete Link to post Share on other sites More sharing options...
JSpencer Posted December 28, 2018 Share Posted December 28, 2018 Make sure the motor is perfectly in the middle, if it is slightly forwards or slightly to the back, one shaft will keep popping out continuously. 1 Link to post Share on other sites More sharing options...
SRman Posted December 29, 2018 Share Posted December 29, 2018 The motors in Heljan main line diesels are usually just wedged in with rubber blocks, as are the pcbs above the motors. 1 Link to post Share on other sites More sharing options...
34theletterbetweenB&D Posted December 29, 2018 Share Posted December 29, 2018 I would tend toward the motor removal route, as the bogie release is a modern clip together version of the old 'Chinese puzzle' games once so popular at this time of year. On the basis of two experiences with other models from their range, the rubber cushions mentioned by SRman can be gently prised up, each side a millimetre in turn, to get the motor out. (Reassembly is a lot quicker and easier you will be glad to know.) 1 1 Link to post Share on other sites More sharing options...
Stormbringer Posted February 3, 2019 Author Share Posted February 3, 2019 On 12/28/2018 at 9:01 PM, JSpencer said: Make sure the motor is perfectly in the middle, if it is slightly forwards or slightly to the back, one shaft will keep popping out continuously. That was exactly what the problem was. A little bit of alignment and DP2 is running nicely on the rolling road. Thank you. Pete 1 1 Link to post Share on other sites More sharing options...
34theletterbetweenB&D Posted February 3, 2019 Share Posted February 3, 2019 Well that's progress, and good to read. The acid test is operation on a layout however, and small radius curves in particular, as these act to increase distance between the flywheel and worm, in addition to slight fore and aft movement of the bogie assembly relative to the motor assembly. 1 Link to post Share on other sites More sharing options...
Stormbringer Posted February 4, 2019 Author Share Posted February 4, 2019 14 hours ago, 34theletterbetweenB&D said: Well that's progress, and good to read. The acid test is operation on a layout however, and small radius curves in particular, as these act to increase distance between the flywheel and worm, in addition to slight fore and aft movement of the bogie assembly relative to the motor assembly. Hopefully tomorrow evening. Pete Link to post Share on other sites More sharing options...
Stormbringer Posted February 5, 2019 Author Share Posted February 5, 2019 DP2 lives again. Thank you guys for all the help and tips. I do have video but the file is too big to upload. Pete Link to post Share on other sites More sharing options...
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