SLOW CRANKING SUPER C

John826diesel · Mar 24, 2011

I have a super c that i recently overhauled the transmission,and painted the tractor. I can not get it to turn over fast enough to start..it just barely grunts and rolls over. I just put in a brand new 6V battery yesterday. Took the starter completly apart and cleaned it. Cleaned all ground connections up good,including starter to bell housing. I just dont understand it...the tractor charges/runs fine when its running.the battery cables look fairly heavy and are in good condition..My BN has the exact same setup and battery,and whips over like 12 volt.. could the starter be shot? it didnt look to bad inside... any advice would be appreciated!!

Brownie 450 · Mar 24, 2011

Try putting a longer ground cable on temporarily & ground it to a convenient bolt near the starter. Those ground cables that went to the ground bolt in the battery box often cause trouble.

Faster346 · Mar 24, 2011

How old are the cables? I had a similar problem on my Farmall M..the cables looked fine, but as a last chance effort (after a new battery, cleaning grounds, new button, ect) I replaced the cables..and it made a world of difference. While my old ones looked okay, they must have been old and cracked inside because the new ones worked like a charm. Make sure you use at least 0 gauge cables with a 6v system.

Also it is possible that your starter is tired. I had a customer bring a Cub starter into our shop. He said it just quit working one day. We rebuilt it, and he installed it and said it must have been on its way out for the last couple years because it turned over 10x quicker than it used to.

ScottyHOMeY · Mar 24, 2011

I'm thinking Brownie may onto something.

In every case, things work best and as they should when all your connectors and connections are bright and tight.

If you seem to be charging okay, I'd be suspecting the few cables and connections between the battery, ground and starter. make sure EVERYthing on the starter end is clean, bright and tightened down well.

As for the ground connection that Brownie mentioned (assuming your battery is grounded to panel box that supports your steering support), that's a good one to check. That's a short cable with a tight bend. To work on it, it's actually easier to remove the bolt on the chassis and wrap it in a rag than it is to remove the cable terminal from the battery, and a lot of folks have done just that. With that short cable being so stiff, amking it tricky to get the bolt started, I found the threads on the chassis where the battery grounds on My SuperC boogered badly enough to mess up my ground. I tapped it out for an extra 1/16" or 1/8", and put a larger bolt to it.

In my case, it fixed the problem you're having.

pete 23 · Mar 24, 2011

Yes, that ground connection inside the battery box is a real problem area and then it has to carry current from there down through the steering support etc so lots of places for voltage drop. If a trial longer ground cable doesn't help you out though , you may want to go back into that starter. The C and Super C use light starter with only two field coils and no center bearing. That means everything in there has to be in really good shape. Just a little too much looseness in the end bushings and armature will rub. I have put center bearings in many of those to support that armature. Most of the end plates do not have a replaceable bushing unless the original end plate was replaced.Wear in the bushing is the single most cause of a doggy starter, not brush's like commonly though. You can get by with more end bearing wear if the center is supported. Also, the stud for the switch is a wear item, may need to replace it also or at least polish it nice and square.

El Toro · Mar 25, 2011

You should have 00 battery cables and don't have them any longer than necessary with soldered ends. Clean all connections until shiny including where the battery is grounded. You may be able to start the engine by hand cranking it. Hal

sflem849 · Mar 25, 2011

Usually if there is a bad ground connection the cable will heat up in a hurry.

SouthernFarmall · Mar 25, 2011

The only thing I can think of that hasn't been mentioned is the weight of crankcase oil. I know it's a long shot, but if really thick oil was used by mistake, it can cause slow cranking. Mostly I use SAE 30 and it works fine summer and winter.
Good luck, SF

Farmallhal · Mar 25, 2011

John, you have several very good responses and I think if you do as suggested your tractor will start. Just another point, you mentioned you painted the tractor - not knowing in what manner you painted it I will share yet something else. I purchased an exceptionally nicely restored Farmall H which had been disassembled and was painted in pieces and then reassembled. The coating of paint on mating surfaces of numerous items between the starter and where the ground cable was attached made it next to a non-starting tractor. It was a 6 volt system as well. I ran a new 00 size cable (short as possible w/soldered terminals) between the ground post on the battery and one of the starter to frame bolts using external tooth washers to get a "good bite" into the starter and it starts like it is hooked up to a 12 volt battery. I also would replace the cable to the switch on top of the starter with a 00 soldered terminal cable also. Running new size 00 cables as I noted to the starter which was previously suggested will probably solve your problem, Hal.

SLOW CRANKING SUPER C

John826diesel

Member

Brownie 450

Member

Faster346

Member

ScottyHOMeY

Well-known Member

pete 23

Well-known Member

El Toro

Well-known Member

sflem849

Well-known Member

SouthernFarmall

Member

Farmallhal

Well-known Member

Similar threads