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Old 06-04-2017, 10:05 PM   #1
Banter68
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Default wheels and links locking on newly brought Airfix Castle

Hi All,
Have brought an airfix castle on ebay and have tried test running it but it seems to be sliding on the loco, it is tender driven by what I can see and the the links dont move much, is this possibly a lubrication issue or can anyone advise.
Many Thanks.
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Old 06-04-2017, 10:41 PM   #2
Mike Parkes
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Typical problem with tender drive locos - turn it upside down and rotate the driving wheels by hand to find the tight spot and then try to work out what is causing it - usually is down to a coupling or connecting rod (Your "links") getting bent slightly so that it catching on the other rod. Worse case can be a driving wheel having come loose on its axle.
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Old 06-04-2017, 11:03 PM   #3
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Thanks for reply will check that out am new to modelling etc so will get it sorted,thanks for advice.
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Old 08-04-2017, 03:09 PM   #4
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This is propbably caused by the crank pins on the centre driving wheels. They have habit of being pushed inwards when in the post. The pins are push fit from the back of the centre drivers and having a hexigon hed push into hexigon holes on the back sides giving them plenty of clearence for the conecting rods. If they have pushed back a bit everything tighens up.. Common problem on these locos.
Hope that is not as clear as mud.
Joihn

PS just adding on. They are push fit from back of all driving wheels and they all can be pushed in a bit causing stiff motion.
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Old 08-04-2017, 05:53 PM   #5
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Cheers for that info can you advise how I can rectify it, do I need to pull the pins out a bit.
Cheers
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Old 08-04-2017, 06:02 PM   #6
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Quote:
Originally Posted by Banter68 View Post
Cheers for that info can you advise how I can rectify it, do I need to pull the pins out a bit.
Cheers
Look at backs of wheels and if they are pushed in you will see the hexicon heads showing. You have to gently ease them back into their hexicon seats with tip of a very small screwdriver or similar tool. You may have to turn the pin using small pair of pointed pliers to line up the hexicon head to the seats.. Perhapse the flat end of a nale file or something. They normally stay in place unless somebody pushes them back picking up the loco with their fingers by the motion, Is one way it happens.
John
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Old 20-04-2017, 08:51 PM   #7
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Hi,
Have looked at loco and oiled motion etc and looked at wheels and motion but cant really see anything catching, the loco tender is powering fine but the loco wheels stick in a certain position, have turned them with fingers and it seems to just catch in one spot then is okay, the tender squeals because its trying to push the loco, the loco wheels are not turning freely in one spot,the loco wheels are the problem or the links, cant seem to get problem sorted unfortunately.
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Old 20-04-2017, 09:02 PM   #8
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Sounds to me like a wheel quartering issue. The driving wheels on one side of the loco should be as near as possible a quarter of a turn forward or back from the other side of the loco. Do a check as if this is out it will revolve through most of the turn until the con rod squeezes the wheel or wheels that are out of the quartering position.
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Old 21-04-2017, 09:14 AM   #9
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Okay will take a look, if it's out how can I sort it, can you advise please.
Cheers
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Old 22-04-2017, 10:57 AM   #10
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It is basically a visual check. If one wheel is out it needs carefully taken off its axle and repositioned taking care the connecting rods etc don't get damaged and checking the wheels are true on the axles and the wheel back to back measurement (Width the wheels are set to) are correct.
A bent connecting rod can also act as if the quartering is out and give similar symptoms, and a buckled wheel on its axle would also give the same issues.
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