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Pony motor starter "gasket" under the band

Pony motor starter "gasket" under the band

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Ccafer
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When disassembling the band of the commutator end, the "gasket" unsurprisingly came out in pieces. Can anyone recommend a suitable replacement material? The parts manual makes reference to a band assembly, but I don't see the material called out. Thanks, Chris

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Fri, Feb 20, 2026 6:24 PM
d2gary
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The last one I took apart had a type of plastic film for a gasket. Probably not original or Cat spec but seems to work

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Fri, Feb 20, 2026 8:11 PM
neil
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Hi Chris, I just used regular thin gasket paper as that's what seemed to have been in there previously. I set it so that the gap was at the bottom so that if any weeping occurred, it would be from the bottom and would allow any moisture out

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Fri, Feb 20, 2026 8:43 PM
Ccafer
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Hey Neil and Gary, thanks! I was thinking, perhaps gasket material would be sufficient. Also, when reassembling the starter?Is there a old school trick for holding the brushes In a position where the commutator can be reinserted. When I disassembled it, the two screws, hold the nose to the rest of the assembly and came out as such. The picture is when I disassembled it.

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Fri, Feb 20, 2026 10:13 PM
d2gary
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I'm sure there's an old time secret but I've always just started the armature through and put pressure against the brushes. Then just reach in through the window and spread them out

There's enough play in the shaft that you can wiggle one side on and then get the other side

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Sat, Feb 21, 2026 3:06 AM
Ccafer
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Sounds like a plan, thanks. I'll give it a try.

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Sat, Feb 21, 2026 3:20 AM
edb
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start with say a 6'' length piece of 1/8" wire bend one end to right angles with about a 3/16" long leg and then bend/form a ring, by hand, to suit your finger on the opposite end makes a tool to lift the brush spring up and off to one side of the brush which you lift at the same time with the other hand so the spring end can sit on the brush cage/holder so trapping the brush, you can then do same to all brushes and have ease of slipping in the armature--after doing so and fitting and securing the thru bolts/screws you can then push the brushes down and if lucky the spring will flick itself into place --if not move the spring into place on the brush in its holder/cage with your new brush spring tool. Ensure the brush wires do not earth out--touch the gen. frame or end cap.

Sorry, it is sometimes difficult to explain something simple that one has done many times in a lifetime--we were taught this in Motor Mechanics Apprentice schooling way back in 1962--had to do a Motor Mechanics Apprenticeship to work on our wonderful Cat equipment--did I ever tell you I hate working on cars/auto's.

Cheers,

Eddie B.

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Sat, Feb 21, 2026 4:10 AM
trainzkid88
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and modern vehicles are worse.

need to be a contortionist to work on em.

and all this plastic covers and crap that actually don't do anything for the operation of the vehicle that have to be removed just to get to that one part.

they actually say its better to do a auto-electrical apprenticeship first then do your A grade mechanical do all ya study in 6 yrs instead of 8yrs as much of the mechanical course is auto electrical anyway so you need that anyway.

electrical gremlins can be much "fun"

"i reject your reality and substitute my own" - adam savage. i suspect my final words maybe "well shit, that didnt work"

instead of perfection some times we just have to accept practicality

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Sat, Feb 21, 2026 9:57 AM
Ccafer
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Location: Rochester. NY
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Edb, great info! I'll certainly give that one a try. Im retired and it proves an old dog can learn new tricks. Ive hobby wrenched alot but it shows that experience and skills still matter alot. Especially on older stuff like the Cats. And I agree on the newer stuff. Thanks guys.

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Sat, Feb 21, 2026 12:31 PM
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