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Backhoe Cub wouldn't start

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awander
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Backhoe Cub wouldn't start

Postby awander » Thu Jun 27, 2013 12:29 pm

I have had intermittent problems with my '72 Backhoe Cub, where it was hard to start. Once started, it ran very well.

All starting of this beast is done electrically, as the Wagner loader effective prevents use of a crank(unless it was 4 feet long or so....)

A few years ago, I started to notice that sometimes, as I let off the key from the Start position to the ON position, it would start up.

It turned out that the problem was in the ignition switch-it was cutting power to the coil while in the Start position. The switch the tractor came with when i bought it was not an original IH keyswitch-it had a know to turn it. Anyway, i replaced it with a $25 switch from Tractor Supply, and all was well for about a year. then it started to happen again, so I checked it out, and sure enough, the new switch was doing the same thing.

I replaced the switch again, this time I sprang for TS's $35 switch. Lasted just under a year, and then the tractor became impossible to start once again. I figured, this time, i knew what the problem was, and sure enough, a voltmeter showed that the switch was dropping all power to the coil when in the Start position. i installed a clip lead between battery and coil, and it fired right up, but ran roughly. I checked the timing, and it was off a bit. Adjusting that got me nice smooth-running engine. I shut down and started a bunch more times with the clip lead in place, then parked it with the bucket just inside the garage.

Next day i went to move it so I could close the garage door-and it wouldn't;t start again! With or without the clip lead. Spent an hour with a friend troubleshooting, and narrowed it down to the hi-tension lead from coil to distributor cap. Replaced that and the tractor started and ran beautifully. Couldn't see or measure any problems with the lead we had replaced, so we put it back on-and the tractor still started and ran beautifully!

I'm wondering if it could just have been a dirty connection, that got cleaned up by removing and re-inserting the lead?

What do you guys think?
Andy Wander
UBE, PA
'52 Farmall Cub "Wile E."
'72 Int'l Cub "Bugs Backhoe"
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Jim Becker
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Re: Backhoe Cub wouldn't start

Postby Jim Becker » Thu Jun 27, 2013 1:33 pm

awander wrote:I'm wondering if it could just have been a dirty connection, that got cleaned up by removing and re-inserting the lead?

What do you guys think?

Wouldn't be the first time.

I think there are a lot of cases where an electrical problem is "fixed" by replacing a part. Removing and reinstalling the old part would have done as well.

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Virginia Mike
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Re: Backhoe Cub wouldn't start

Postby Virginia Mike » Thu Jun 27, 2013 3:26 pm

Some solenoids have 2 connections. One goes from the solenoid to the coil to provide current during cranking. I don't know if yours is wired this way.

When I worked field service, I got a call that one of our rental backhoe wouldn't start.
When I got to the job site, the machine was in a foundation, covered with water, only the ROPS sticking out.
Had to use a crane to get out of the hole, and onto a trailer.
A thunderstorm the night before flooded the foundation.
The construction crew called it in as; won't start, and they were right.
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Mike
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"A Cub will do as much as a team of horses,.. More in hot weather!" - C. W. Spradlin 1909-1994

bythepond88
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Re: Backhoe Cub wouldn't start

Postby bythepond88 » Thu Jun 27, 2013 4:58 pm

Ditto to what Jim said. I can't count the number of times things went wrong with my MG. I'd take her apart, clean things up, put them back together, and she'd be fine, even though I didn't find anything actually wrong. Personally, I think she just wanted the attention.
Michael Cummings
Eddie - a 1959 International Lo-Boy named after my father in law, who who bought her new.

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Re: Backhoe Cub wouldn't start

Postby Denny Clayton » Thu Jun 27, 2013 5:27 pm

Virginia Mike wrote:Some solenoids have 2 connections. One goes from the solenoid to the coil to provide current during cranking. I don't know if yours is wired this way.

When I worked field service, I got a call that one of our rental backhoe wouldn't start.
When I got to the job site, the machine was in a foundation, covered with water, only the ROPS sticking out.
Had to use a crane to get out of the hole, and onto a trailer.
A thunderstorm the night before flooded the foundation.
The construction crew called it in as; won't start, and they were right.

:headbang :big give up:
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Re: Backhoe Cub wouldn't start

Postby Barnyard » Thu Jun 27, 2013 5:57 pm

Virginia Mike wrote:When I got to the job site, the machine was in a foundation, covered with water, only the ROPS sticking out.
Had to use a crane to get out of the hole, and onto a trailer.
A thunderstorm the night before flooded the foundation.
The construction crew called it in as; won't start, and they were right.

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