Hornby 0-6-0 Jinty

Discussion in 'Hornby RTR' started by Dave C, Jun 22, 2018.

  1. Dave C

    Dave C Full Member

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    I've had one of these awaiting a service ever since I bought it 2nd hand. Finally got round to it yesterday. After servicing, without the body on, it ran like a sewing machine. Put the body on and it sounded like a bag of graunching nuts.
    Concluded the body was acting as an echo chamber so stuck blu tack into the voids (obvously the body, not the chassis!).
    It was ok for about minute, then the graunching started again. Fiddled with it again, but still graunching, yet no noise without body.
    The body is clipped on ' no securing screws.
    Any suggestions?
     
  2. Toto

    Toto I'm best ignored Staff Member Founder Administrator

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    Strange one that. I am sure someone will have the answer. It'll be interesting to hear how it is resolved.

    Toto
     
  3. Keith M

    Keith M Staff Member Moderator

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    I think I'd be looking to see if there were any signs of wheels rubbing on the underside of the splashers first Dave. If nothing noticeable, could you run the loco in an upside down position (possibly using a makeshift 'cradle' to hold it), touching wires onto the wheels for the power supply, and see if there is anything more visible (or audible!) like that. Failing that, as you've mentioned that the body only clips on, is that the cause, vibration of the body itself due to not being securely fixed to the chassis?
    Keith.
     
  4. Dave C

    Dave C Full Member

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    I did think the clipping was a possibility. I tried a blob of blu tack underneath the footplate - maybe its not sticky enough and came loose, so I'll try tacky black on Sunday evening, and get some on the front as well - after trying the inverted idea you suggested.
    Cheers. Dave C.
     
  5. Dave C

    Dave C Full Member

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    OK - tried the upside test - no joy. Tried tacky black instead of blu tack between chassis and body, and got soem blu tack stuck near the front clips, and more on the inside of the water tanks. No joy. Then discovered the graunching was now occuring with the body off! Tried loosening / tightening the motor on its mount - no luck. Applied more lubrication to the armature shaft bearings - no joy. Applied a bit more - bingo. :headbanger: The bearing between the armature and the worm took most of it - now on older Hornby chassis there are felt pads which I've found need to be well soaked in oil when they have dried out - no sign of felt pads on this, but there is a sort of brass housing, and I'm wondering if its stuffed with felt?

    Anyway, another bonus - there is now so much blu tack inside the body the Jinty can now just about make my 1 in 40 incline - just got to sort the poor running axles out on the 2 suburban coaches its pulling and that should be another problem sorted.:)
     
  6. York Paul

    York Paul Staff Member Moderator

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  7. Bernie

    Bernie Full Member

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    Hi, I have a Hornby Railroad R3297X Jinty Crimson LMS #16440, DCC fitted. Bought new years ago and only now just trying to run it after cleaning and oiling. It has the grumbling sound that you describe when starting to move, but it also runs very erratically on DCC in both directions. With DC test track (still DCC chipped) it runs great forwards at all speeds but stops & starts in reverse at medium speed (about 6 volts). In reverse it runs OK at slow (3 volts) and faster (9, 12 volts). After removing the motor and running it via the pickups on DC power, it works great in one direction, but stops and starts at medium speed in the other, so it is not mechanical (gears, wheels, connecting rods or quartering). After removing the decoder and pickups, running the motor on DC via the motor socket connections it works great. So, DCC chip, pickups, wires or capacitor?
     
  8. Walkingthedog

    Walkingthedog Full Member

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    These locos need running in, as do all locos. 30 minutes moderate speed in each direction. If you have a circuit 30 minutes facing forward then turn the loco round then 30 minute facing backwards travelling in the same direction.
     
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  9. Keith M

    Keith M Staff Member Moderator

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    If you still have the capacitor in circuit, then best get rid of it, it's not needed and can upset the control by the decoder, likewise if there are any chokes (wound wire, possibly wrapped around a ferrite core), remove these also for the same reason. If the loco was bought 'DCC Fitted', it will be a Hornby decoder, the less said about those the better, and once you have sorted out smooth running on DC, then try substituting a decent make (ie-Not Hornby or Bachmann!) of decoder instead, you'll likely find it will make a difference.
    Keith.
     
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  10. Bernie

    Bernie Full Member

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    The grumbling sound is something to do with the decoder. I also have a hornby sentinel - (same model hornby 4 pin decoder socket) on DC with the blanking plug works fine and quietly. Add the decoder and on DCC it grumbles for the first couple of speed steps. I did some component swapping and think the jinty hornby decoder is at fault, as with that decoder installed into the sentinel it starts and stops in one direction, while the new decoder works fine in the jinty.
     
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  11. Bernie

    Bernie Full Member

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    Thanks Keith, good tip, and certainly worth a try to see if it settles the Jinty down, much cheaper than getting a new decoder. Interestingly, the Hornby sentinel does not seem to have the capacitor, although the instructions says it does.
     
  12. Bernie

    Bernie Full Member

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    Thanks Walkingthedog. I do have a 1 length of flex track DC test track where I ran these back and forth over several cups of tea, but not a circular track to set and leave. I will see what I can set up on the dining table.
     
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  13. Walkingthedog

    Walkingthedog Full Member

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    Or a rolling road. Locos really do need running in but I bet not many do it.
     
  14. jakesdad13

    jakesdad13 Staff Member Moderator

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    As walking the dog says, 'a rolling road would be perfect for those without a roundy type layout. Mine is an adjustable for wheel sets and sits on a short length of track. They don't have to be expensive, or fancy. I will check who made mine and let you know, I think I paid around £35 for mine. It is something I use quite a lot, more than my layouts for certain :whatever::)

    Pete.
     
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  15. jakesdad13

    jakesdad13 Staff Member Moderator

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    These are my rolling road thingys.

    They come with an Allen key to set the gauge then simply clip them onto the rail.

    Cheers, Pete.
     
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  16. Walkingthedog

    Walkingthedog Full Member

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    I’ve got those, very cheap compared to some but very good.
     
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  17. Bernie

    Bernie Full Member

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    Long time between posts, I have removed the capacitor. Only procedural issue is that the stiff wires of the capacitor were used to separate bare wires in the circuit and the 'shrink tube' is very loose - not shrunk. So, now insulated. No different. On DC Analogue power and fitted with the DCC Digital chip it works OK forwards at all speeds, and in reverse except for at 6volt speed where it consistently stops and starts intermittently. With the DC blanking plug installed it works quietly in both directions and at all speeds. On the DCC digital test track with the hornby chip installed, it is noisy and intermittent at all speeds in both directions. Conclusion, faulty hornby 4 pin decoder. (I have another in a hornby sentinel, that works great and quietly as DC but rough and noisy with the Hornby 4 pin DCC chip).
    Now I have noticed the plating on the driving surface of the wheels is coming off. This loco is new old stock, and has done about 6 circuits of a club layout and less than an hour testing on an incomplete end to end, and the metal plating is coming off at least 3 of the driving surface of the wheels.
    JintyWheel 1.JPG Jinty Wheel 2.JPG
     
  18. Keith M

    Keith M Staff Member Moderator

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    I also have an o gauge set.
    Keith.
     
  19. Gary

    Gary Wants more time for modelling.... Staff Member Administrator

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    I have an old tender powered Airfix 4F and from the day I picked it up to just recently, it sounded like a handful of gravel in a metal tin being shook ! I opened her up, cleaned the wheels, checked the electrical connections from the tender to the loco, checked the pick ups on the loco, greased the cogs (gears) and she still sounded like that tin of gravel when I ran it with the tender suspended. I ended up putting a small drop of KY gel on the motor axle (Ringfiled type motor) and hey presto, no noise !

    She now runs like the day she left the factory !

    Cheers, Gary.
     
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