 robmon
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| Joined: 26 Dec 2010 |
| Total Posts: 21 |
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jammed chain 643
Posted: 12/26/2010 06:12 PM |
| Firstly sorry I previously posted in wrong section, oops!!
I have a 643 , rear chain broke and has doubled over in rear top cnr, have been trying to free it up but access is a night mare, thinking I might have to undo bolt holding rear sprocket on to get chain off, any tips for this, ie, left hand thread or right, will undoing this mean axle can come out?? Also machine does creep a bit when idleing is this just an adjustment to levers??? or worn hydraulics?? |
pool installer with s130 , 643, dingo 750 |
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robmon
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| Joined: 26 Dec 2010 |
| Total Posts: 21 |
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Re: jammed chain 643
Posted: 12/26/2010 09:34 PM |
| good news, managed to free chain through persistance!!! was losing sleep thinking about stripping out motor and pump just to get to chain!!! |
pool installer with s130 , 643, dingo 750 |
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Re: jammed chain 643
Posted: 12/27/2010 07:54 AM |
Most of the sprockets are press on, they won't just come off when the bolt is removed. You need to use a porta power orjsckto pull the axel out.
Common practice is to use the drive of the loader to loosen the bolt. If you have a broken chain however this can't be done for that wheel.
Ken |
NH LS 160, S150, S185 Hoe Brusher Grapple Auger, Mixer Tiller Soil Conditioner Trencher Tracks Snow Blade Wood Splitter Stump Grinder Land Plane.
Dealer Virnig Erskine McLaren Loegering Vts Componets Plus Wallenstein Bauma Lite |
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robmon
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| Joined: 26 Dec 2010 |
| Total Posts: 21 |
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Re: jammed chain 643
Posted: 12/27/2010 08:32 PM |
Thanks for that Ken, thankfully I dont need to remove sprocket. Was wondering though is it possible to tighten wheel bearing, i seem to have a little play, about 5mm on each one,in and out ways which means when turning 180 degrees the movement becomes 10mm from side to side if that makes sense?? when doing this under load there was a clunking noise coming from chain area, not sure if it was skipping a tooth on sprocket but sounded like it. also fair amount of play in hydraulic drive motors also about 10mm is this a sign of wear??this means when doing 180dg turn chains may not line up properly between drive sprocket and wheel sprockets
clunking noise may also have come from a piece of metal floating around in there, tried to upload a pic of it for identification but havent worked that out!! It is a half circle magnetic 8mm thick, 50mm wide no idea what it is from any advise welcomed |
pool installer with s130 , 643, dingo 750 |
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Re: jammed chain 643
Posted: 12/27/2010 09:07 PM |
The book calls for something like .005” end play in the axels and the only adjustment is new bearings (you may be able to shim them tighter, but with all the work for the play you have not sure its worth it) I'd say if your seals don't leak, forget it.
Do all your other chains look ok? No missing rollers etc. How much are they stretched?
With the tires off the ground how far can you rotate the face of the tire fore and aft before the hains becomes tight. @3” is about right
Ken |
NH LS 160, S150, S185 Hoe Brusher Grapple Auger, Mixer Tiller Soil Conditioner Trencher Tracks Snow Blade Wood Splitter Stump Grinder Land Plane.
Dealer Virnig Erskine McLaren Loegering Vts Componets Plus Wallenstein Bauma Lite |
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robmon
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| Joined: 26 Dec 2010 |
| Total Posts: 21 |
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Re: jammed chain 643
Posted: 12/28/2010 02:56 PM |
can onyone tell me where this part may have come from , found it in chain case of 643 bobcat, 8mm thick 50mm wide 70mm long, also magnetic
everything seems to be in order with all sprockets, cant see anything like it on front sprockets or drive motor, could it be part of brakes??? I dont have a manual so any comments welcomed, regards Rob
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pool installer with s130 , 643, dingo 750 |
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Re: jammed chain 643
Posted: 12/28/2010 05:24 PM |
| Likely is a magnet that a previous owner put in there to collect metal shavings. A lot of people do that including me. I epoxy magnets inside the pan of any engine, transmission or gear case I work on. |
Bobcat 453F ,Loegering steel tracks, Grouser steel tracks, 48" Dirt bucket, 48" toothed bucket, grapple bucket, 72" hydraulic vee snow plow and utility forks,
1954 Ford 860,
1952 Allis Chalmers CA,
1947 Case SC,
Nashville IL USA
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Tazza
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| Joined: 08 Dec 2004 |
| Total Posts: 10193 |
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Re: jammed chain 643
Posted: 01/02/2011 01:42 PM |
I agree, that looks like a magnet to pick up any metal shavings that come from chain or sprocket wear.
You can take up the slack in the axles by skimming a little bit bit from the washers that the bolts go through that hold the sprockets on. You basically make a step that will pull the axle in a little more to take up any end play. 5-10mm is quite a lot, you may be up for a set of bearings soon. |
Bobcat 763 burnt but i'm working on it!, 04 S150 with air and a smooshed cab, S250 turbo. |
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