Forum Discussion

klm's avatar
klm
Explorer
Nov 30, 2014

loud "thunk" retracting the slide

I have a 02 Newmar. The main slide out made a new and worrisome sound. The clunk, thunk noise seemed to be in the area of the front rail. The slide extended and retracted normally, but I am concerned that there is a problem. The slide is currently extended. I did look at that front rail, nothing looked unusual, but I know nothing about mechanical things. There is a threaded rod, what I can see again looks ok. I cannot see the far end
of either rod or rail. Any ideas?

UPDATE!!!!! The slide has operated normally since that 1 time loud thunk clunk by the front rail. I had the coach serviced at a Newmar facility today. I mentioned the slide issue. Turned out the roller was bad, just that 1, all others good. Replaced with new $17 roller.

Thanks
Class A
  • TennesseeBob's avatar
    TennesseeBob
    Explorer
    Nov 30, 2014
    I had a loud thunk on my bedroom slide and it was the bracket that the threaded rod passed thru had broken off and hanging up
  • wa8yxm's avatar
    wa8yxm
    Explorer III
    Nov 30, 2014
    Two thoughts, the shear pin is one

    The other.. If for some reason the side is out of sync the rack will JUMP a tooth on the pinion.. This causes a loud THUNK, this can happen if something blocks it moving all the way in or out, or if the pin shears.
  • newman_fulltime's avatar
    newman_fulltime
    Explorer II
    Nov 30, 2014
    look between the front tire and infront of the cargo bay there should be a trap door with two screwstake them out drop the door.
    you might want to get a grade 8 1/4 by 1 1/2 with a few washers to replace the shear pin with
  • klm's avatar
    klm
    Explorer
    Nov 30, 2014
    OP here. I will check in the morning. Thank you, I think you guys gave me good advice. If it's the pin at the far end is it accessible? Also I am mechanically inept, is this something a mobile tech can fix?
  • ScottG's avatar
    ScottG
    Nomad
    Nov 30, 2014
    I agree it sounds like a shear pin.
    Look under the slide for a square tube that runs the length of the slide. At each end of this tube there will be a bolt where the gear connects. This is the shear pin. The bolt may still be in place but one end of it will be broken off.
  • newman_fulltime's avatar
    newman_fulltime
    Explorer II
    Nov 30, 2014
    the soundyou are describing sounds like the shear pin on the end that connects the rod to the farther gearbox.Your pin might be loose and walding out the uole and the clunk is the rod turning then catching as it gets to theend of the hole

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