starter contact switch

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Dusty B
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starter contact switch

Postby Dusty B » Sun Jul 24, 2022 5:11 pm

Has anyone else had trouble with the contact switch going bad or new ones not working?? Will start w/crank fine but contact just suddenly quit working! Mounted a new one, no help! Starter works fine w/direct contact to the lug! Are they repairable??
Grandpa's '41 B
'56,,'57,'59, Cu'b
'45 C
'55 Case S
Dad's DB garden tractor
'48 DeSoto
'31 "A Coup
'79 Lincoln TC
God looks out for those of us who don't know how to look out for ourselves!

Ky Cub
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Re: starter contact switch

Postby Ky Cub » Sun Jul 24, 2022 5:35 pm

Did you try sandpaper on the contact points, on post and new switch?

staninlowerAL
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Tractors Owned: Cubs: (3)'49's, (1 is for parts), (1)'57 IH Cub LoBoy w/FH, (2)154 Number Series Loboys, (1 is for parts), '76 Longstripe w/FH, Mowers: C-22, Bush Hog 412, Pennington 59, Woods RM42CF, Woods 42, assorted FCub plows, planters, discs, etc. OTHERS: '49 AC B & Ind. Sickle mower, '61 AC D12 Ser 2, '52 8N, '56 Ferguson 35 Deluxe, '47 & '49 Avery V, '53 MM BG (offset), '51 JD M (regular), '56 JD 420C, with Blade and fire plow, '85 JD 850 (Yanmar) w/72" belly mower, '76? Yanmar 2TR15 1500 & Bush Hog SQ42S-2 mower, '78? FORD Dexta, '86 FORD LGT14D & 48" Mower, (2)Cub Cadets & Mowers (MTD), (4) Sears Surburban's, other MTD mowers, Jeeps & other misc. "treasures"
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Re: starter contact switch

Postby staninlowerAL » Sun Jul 24, 2022 5:37 pm

Someone posted about slotting the mounting holes so the switch could be adjusted a bit closer to the starter contact nub. Also the contact nub on the starter gets worn down over time and might need replacing.
Stan in LA (lower AL)
USAF & Reserves, Reg ARMY, ARMY NG (AL)

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Dusty B
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Posts: 1882
Joined: Wed May 23, 2007 7:35 am
Zip Code: 61736
Tractors Owned: '45 SC Case
Circle of Safety: Y
Location: IL, Downs

Re: starter contact switch

Postby Dusty B » Sun Jul 24, 2022 8:06 pm

Worth a try! Thanks. willl get out the dremel and see what happens!
Grandpa's '41 B
'56,,'57,'59, Cu'b
'45 C
'55 Case S
Dad's DB garden tractor
'48 DeSoto
'31 "A Coup
'79 Lincoln TC
God looks out for those of us who don't know how to look out for ourselves!

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Dale Finch
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'55 Cub #191739 "Bertha" with Woods 42 mower
'56 Cub #194370 "Boris" with Mott Flail mower
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Location: NC, Chapel Hill

Re: starter contact switch

Postby Dale Finch » Sun Jul 24, 2022 8:19 pm

Dusty, I have a good starter/alternator repair shop near me that did replace the "nub" on top of the starter (it's soldered inside). I don't remember what they charged, but it wasn't too bad. The old one had been filed down so much a new switch didn't help.
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staninlowerAL
10+ Years
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Posts: 5082
Joined: Fri Oct 29, 2010 11:34 pm
Zip Code: 36558
Tractors Owned: Cubs: (3)'49's, (1 is for parts), (1)'57 IH Cub LoBoy w/FH, (2)154 Number Series Loboys, (1 is for parts), '76 Longstripe w/FH, Mowers: C-22, Bush Hog 412, Pennington 59, Woods RM42CF, Woods 42, assorted FCub plows, planters, discs, etc. OTHERS: '49 AC B & Ind. Sickle mower, '61 AC D12 Ser 2, '52 8N, '56 Ferguson 35 Deluxe, '47 & '49 Avery V, '53 MM BG (offset), '51 JD M (regular), '56 JD 420C, with Blade and fire plow, '85 JD 850 (Yanmar) w/72" belly mower, '76? Yanmar 2TR15 1500 & Bush Hog SQ42S-2 mower, '78? FORD Dexta, '86 FORD LGT14D & 48" Mower, (2)Cub Cadets & Mowers (MTD), (4) Sears Surburban's, other MTD mowers, Jeeps & other misc. "treasures"
Circle of Safety: Y
Location: AL (Southwest)

Re: starter contact switch

Postby staninlowerAL » Sun Jul 24, 2022 9:35 pm

Dale Finch wrote:Dusty, I have a good starter/alternator repair shop near me that did replace the "nub" on top of the starter (it's soldered inside). I don't remember what they charged, but it wasn't too bad. The old one had been filed down so much a new switch didn't help.

Fortunately I have a local repair shop that does these type repairs and rebuilds. Complete teardown, new brushes, bushing, bearing, testing/reinsulating fields, replace nub cost less than $100. Essentially a new starter.
Stan in LA (lower AL)
USAF & Reserves, Reg ARMY, ARMY NG (AL)

Waif
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Re: starter contact switch

Postby Waif » Mon Jul 25, 2022 9:31 am

You mounted a new one. No good contact followed.
Hunting that if the lug on the starter is clean ; you are not getting enough reach. OR , not enough juice flowing to switch. Or as has happened elsewhere enough , both.

That lug erodes from use. A stairstep shape can be seen on a well used one. Dressing it flush again creates a bigger gap to breach by the switch contact.
It can only reach so far.

You can study your linkage to switch just in case something is out of whack.


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