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  7. Finding master pin on d4 6u and 7u

Finding master pin on d4 6u and 7u

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2 years 5 months ago #237338 by Reisingerweld
Finding master pin on d4 6u and 7u was created by Reisingerweld
Looking to split 2 sets of tracks and on any of the 4 assemblies I can't for the life of me find a dimple or hole or any identifying mark to tell me which pin is the master. Any idea on how to figure this out?
D4 6U9483SP
Hyster D4N winch

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2 years 5 months ago #237343 by PhilC
Replied by PhilC on topic Finding master pin on d4 6u and 7u
The only way I can think of is to look at the pin between the link and see if you can see a split bush. You may be able to use a thin rule to see if it reaches in as far as the track pin. If it does it's the master.
I have the same problem with my 305CR excavator tracks. I have to remove a link but I can't identify the master pin so I put the rubber tracks back on for now.
944A - Machine SN 43A2589 Engine SN 90A284
955K- Machine SN 71J3772 Engine SN 83Z0704
D6 SN's 4R732sp, 5R2724, 5R4832
D8 SN's 15A1254, 15A2287, 15A2723

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2 years 5 months ago #237349 by Old Magnet
Replied by Old Magnet on topic Finding master pin on d4 6u and 7u
As PhilC says, as a last resort use a feeler gauge (hack saw blade etc) to fish for the short bushing.
 
 
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2 years 5 months ago #237354 by Reisingerweld
Replied by Reisingerweld on topic Finding master pin on d4 6u and 7u
Ok not a bad idea, thanks guys
D4 6U9483SP
Hyster D4N winch

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2 years 5 months ago #237358 by trainzkid88
Replied by trainzkid88 on topic Finding master pin on d4 6u and 7u
just a suggestion once you find it mark the ends with a M so you can find the bloody thing easily next time. a large letter stamp should do or a engraver

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2 years 5 months ago #237360 by PhilC
Replied by PhilC on topic Finding master pin on d4 6u and 7u
Forgot to mention check both sides of the chain as the link may be hard up against one side but have clearance on the other side.
Also as tk88 said mark it for future reference but use a grinder or drill a witness hole in the end of the pin. Especially if you have track guards on as they will obliterate engraver or letter stamp marks.
944A - Machine SN 43A2589 Engine SN 90A284
955K- Machine SN 71J3772 Engine SN 83Z0704
D6 SN's 4R732sp, 5R2724, 5R4832
D8 SN's 15A1254, 15A2287, 15A2723

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2 years 5 months ago #237373 by caterpillar13
Replied by caterpillar13 on topic Finding master pin on d4 6u and 7u
i painted the master link real heavy and then did it years later, and i twisted a heavy wire around the spacer post in the rail link
The following user(s) said Thank You: hfdzl, Busso20

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  1. Forum
  3. Antique Caterpillar Machinery Owners Club
  5. DISCUSSION
  7. Finding master pin on d4 6u and 7u
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