Oyster Creek Posted September 19, 2020 Share Posted September 19, 2020 I have recently acquired a Hornby Schools "Charterhouse" with a failed ringfield motor and I need to extract the drive unit from the chassis; this is the version with a metal chassis frame, the only plastic part I can see is the bridge-piece carrying the front coupling pin. The service sheet diagram isn't really any use as it doesn't show exactly where to prise. I'm sure the "nub" projecting through the front frame needs to be pushed back but it isn't clear how to achieve this as it seems to me that all the components involved are metal. Can anybody help with this?/media/tinymce_upload/c81a590170ed1e2754a9afd0c83ac783.jpg Link to comment Share on other sites More sharing options...
VESPA Posted September 21, 2020 Share Posted September 21, 2020 Have a look at these http://www.hornbyguide.com/service_sheet_details.asp?sheetid=107 http://www.hornbyguide.com/service_sheet_details.asp?sheetid=65I think you only need to pull off the red wire spade connector to release from the motor. Link to comment Share on other sites More sharing options...
Going Spare Posted September 21, 2020 Share Posted September 21, 2020 If you refer to service sheet 133/A, you will see that towards the bottom at each end of the main motor block casting, there is a horizontal lug. These locate in to slots at each end crossmember of the chassis frame. By inserting a flat screwdriver blade at the rear end, between the chassis frame and the motor block, the lug can be eased out of the slot allowing the back end of the frame to fall away and in so doing, release the front lug from its slot. Link to comment Share on other sites More sharing options...
Seacommander Posted September 21, 2020 Share Posted September 21, 2020 On my Schools a considerable - and scary! - amount of force was required to release the motor block from the framings. Before reassembly I filed some of each lug away to ease replacement of the motor block and also to make any subsequent dismantling easier. Link to comment Share on other sites More sharing options...
VESPA Posted September 22, 2020 Share Posted September 22, 2020 As I said in my post. Link to comment Share on other sites More sharing options...
Oyster Creek Posted September 22, 2020 Author Share Posted September 22, 2020 Thanks for your replies; to Seacommander, where exatly did youapply this force, please?I have already examined all the Service Sheets mentioned minutely; as I said, they are not very helpful as they show the loco coupling pin being bent forwards but not exactly where to insert the screwdriver. They also show initial detachment taking place at the loco end of the tender, although witness marks on the chassis indicate that an attempt, or attempts, have been made to release the lug at the rear end. You can see from my photo that the red wire has been disconnected but this doesn't release the chassis frame from the motor unit. I guess I'll have to keep poking around until I find the secret! Link to comment Share on other sites More sharing options...
96RAF Posted September 22, 2020 Share Posted September 22, 2020 I would suggest working on this tab which may also show similar at the other end... /media/tinymce_upload/051718a469bd92e37d0534beffdf01a6.png Link to comment Share on other sites More sharing options...
96RAF Posted September 22, 2020 Share Posted September 22, 2020 Further info from service sheet 133 back... /media/tinymce_upload/b40b4b2363d5ab55836fdd8064fb3cbd.png Link to comment Share on other sites More sharing options...
Oyster Creek Posted September 22, 2020 Author Share Posted September 22, 2020 Yup, that's exactly where I'm working; unfortunately as both chassis frame and motor unit are cast metal there is no "give" in either. I'm reluctant to apply "scary" amounts of force....perhaps that's my problem but, as I can't detect any movement whatsoever, I'm not keen to apply more!So I've taken the Seacommander's approach and applied scary amounts of force; and I find that, fortunately, I applied it in the correct place!The answer to the question, "Where exactly do I insert the screwdriver?" is "Above the protruding lug, bending force to be applied downwards until the lug disappears into the chassis frame, at the same time pressing hard on the wheels from below."It's out! Link to comment Share on other sites More sharing options...
atom3624 Posted September 22, 2020 Share Posted September 22, 2020 I had a spare tender I was using for another locomotive and needed part of it - chassis or body, I forget now - and ended up breaking them - as you say, very difficult and no 'give'. Al. Link to comment Share on other sites More sharing options...
Seacommander Posted September 23, 2020 Share Posted September 23, 2020 Hello Oyster Creek. I have just unearthed my Schools (Sevenoaks) and removed the tender body to refresh my memory on where to apply the force. I see , however, that you have successfully removed the motor block - I think you will agree that a frightening amount of force was required to release the block. If you have not yet replaced the block I would urge you to file away some of the mounting lug to make replacement and any subsequent removal much easier. Link to comment Share on other sites More sharing options...
Bruce-810391 Posted July 17 Share Posted July 17 Hi guys. I have the same problem with Schools Class R2018 Radley. I have read the service sheet instruction and tried to prise the coupling pin forward to remove the motor assembly but nothing moves even with considerable force. How on earth do I get the motor out without damaging or breaking something? Does anyone have pictures or a video of how you did it please including exactly where to “Prise the Coupling Pin Forward with a Small Screwdriver” Also, what do you file off for future ease of removal? Link to comment Share on other sites More sharing options...
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