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SMTA won't turn over

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GordoSD

05-15-2006 09:36:37

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Tried to get my SMTA running today. Hasn't run since parked last Dec. New battery, fresh clean terminals, large cables. It spun maybe 1/4 turn then stopped. Now, only loud click from solenoid and no engine turn. Can't hand crank as that is missing. Assume it is corrosion in cylinders, and will have to pull it. Where is the safe place to hook onto it. It is a narrow front. And do I try to start in 1, 2, 3,? Never have pull started a tractor.

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gene bender

05-16-2006 05:13:57

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Re: SMTA won't turn over in reply to GordoSD, 05-15-2006 09:36:37

Sounds like the starter is jammed take it loose so the bendix can release.

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Bob M

05-16-2006 05:11:37

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Re: SMTA won't turn over in reply to GordoSD, 05-15-2006 09:36:37

One rear rolling forward and the other skidding backward is normal - just the differential doing it's thing.

Tip: If you have to pull it again to unjam it, put the transmission in 5th gear before pulling. It's less likely to skid a rear tire, it puts less strain on expensive internal parts, AND the tractor will be much easier to pull.

Regarding the speed control problem, sounds like the carb throttle shaft is stuck, or the governor spring has broken. That carb screw adj you were messing with is the low idle stop screw - it's used only to set the low idle RPM.

Check first the linkage between the hand lever and the governor rockshaft (input shaft) is intact. Then check the carb throttle shaft moves freely. If both of those are OK the suggest remove the governor cover for peek inside - something's amiss in there.

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GordoSD

05-15-2006 16:53:48

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Re: SMTA won't turn over in reply to GordoSD, 05-15-2006 09:36:37

Got it running. I put a chain behind the two bolts up on the frame. Gave her a tug just to get it off a "flat spot" on either the starter or the flywheel. In 2nd gear. It was on concrete. The right wheel rolled forward and the left rolled BACKWARD. Actually spun the tire skidding to the rear.Is this normal? But just that little movement and it fired right up. Another question. While adjusting the carb I set it at max throttle, didn't seem very high. Turned the governor screw in a turn and a half and gained about 400 rpm...BUT then when I retarded the throttle the rpm stayed up there. I couldn't retard the throttle off that high rpm until I backed the screw out again. How do I get both the higher rpm and throttle control up there?

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Nat 2

05-16-2006 05:17:34

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Re: SMTA won't turn over in reply to GordoSD, 05-15-2006 16:53:48

Yes, having one wheel spin backward like that is normal. The spider gears in the differential act like a reversing gearbox when the engine doesn't spin. There wasn't enough traction to turn the engine over.

Your problem was that you used too low of a gear to pull start it. 4th, or even 5th, gives the wheels better mechanical advantage to turn the engine over. It's completely backward from when the engine is turning the wheels, and 1st gives the best mechanical advantage.

There was probably no need to pull start it. What happened is that the starter drive got bound up in the ring gear. All you needed to do was put the tractor in 5th and rock it back and forth by hand. You'd hear a soft pop from the starter releasing from the ring gear. The reason this happens is because the starter and/or ring gear is/are worn.

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sammy the RED

05-15-2006 16:31:49

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Re: SMTA won't turn over in reply to GordoSD, 05-15-2006 09:36:37

Starter has locked twice on my Super M-TA in the last 20 years.

Put her in 4th gear and try rocking it first.

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Fluggie in IA

05-15-2006 16:06:41

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Re: SMTA won't turn over in reply to GordoSD, 05-15-2006 09:36:37

Heck - just pull the plugs and try to crank it over by jumping or make sure you have a full charge. could just be a little water in the cylinders.
can't be too much rust inthat small of a time!
good luck - if it still won't go, call me & I'll take it off your hands!

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old

05-15-2006 10:30:58

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Re: SMTA won't turn over in reply to GordoSD, 05-15-2006 09:36:37

If it where me I would put some tranny fluid in each cylinder and also do as the others have said. Sitting that long you probably have some rust in the cylinders and its stickking a little. Also try the starter as it also may have jammed. When you turn it ovewr with the tranny fluid in the cylinders be sure to leave the plugs out so the cylinders will clear the fluid out and not cause a hyd lock.

Hobby farm

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Bob M

05-15-2006 10:04:40

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Re: SMTA won't turn over in reply to GordoSD, 05-15-2006 09:36:37

Could also be the starter bendix has jammed. If the tractor is on hard ground put it in 5th gear & TA direct, then try rocking it backard an inch or two. (When the fan blade moves at all the bendix has unjammed).

Or loosen the cap screws holding the starter to the clutch housing 7 or 8 turns, then pull the starter away from the engine a bit. If you hear a "clunk" inside the bendix has unjammed. Retighten the caps screws and try starting again.

Good luck!

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Nebraska Cowman

05-15-2006 09:57:12

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Re: SMTA won't turn over in reply to GordoSD, 05-15-2006 09:36:37

I'd probably try rocking the engine backwards first. I have used a bar on the ring gear teeth by removing the starter but be careful, you can chip the teeth. Gently pulling with the tractor in reverse should do the same thing. Unless you take it out on the blacktop and abuse it you shouldn't bend a rod, on dirt the tires will slide.

Even bad boys are just as good as they can be

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Janicholson

05-15-2006 10:55:24

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Re: SMTA won't turn over in reply to Nebraska Cowman, 05-15-2006 09:57:12

I differ on this one, If the pistons are near TDC and the tractor is pulled with fluid in the cylinder it can (and has been seen by me) bend rods, or break cranks. The leverage on the rod is near infinite at that point, and the fluid is incompressible.
JimN

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the tractor vet

05-15-2006 09:57:29

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Re: SMTA won't turn over in reply to GordoSD, 05-15-2006 09:36:37

I go along with the pull the plugs first and also drop the splash pan up under the ft. pulley and get a pipe wrench on it and see if you can turn it backwards you will have to put the T/A in the low side or block the clutch pedal down for it to turn backwards , also pull the started out as it may have locked in the flywheel .

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Nebraska Cowman

05-15-2006 09:59:24

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Re: SMTA won't turn over in reply to the tractor vet, 05-15-2006 09:57:29

Thanks TV, I didn't think about the TA stopping it from turning backward.

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the tractor vet

05-15-2006 10:04:37

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Re: SMTA won't turn over in reply to Nebraska Cowman, 05-15-2006 09:59:24

A long time ago i figured that out as it had me scratchen my head for a couple hours as to why a 400 would not turn backwards while i was tighten up the clutch as when i install a clutch i hang everything on the input shafts then slide the tractor together then go up thru the bottom to put the bolts in that way i do not have to fight the splines and chacne bending the disk , they slide together so nice that way and i can lay down while i work.

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Janicholson

05-15-2006 09:46:20

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Re: SMTA won't turn over in reply to GordoSD, 05-15-2006 09:36:37

Gordo, Pull the spark plugs and leave the ignition off then try to crank it. It should spin easily. Pulling it is a good way to bend a rod if it is stuck. It may have massive fuel in the cylinders, be careful. Check the oil and be sure it is not diluted with fuel. Always shut off the fuel when stopping the tractor, even for ten minutes.
JimN

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GordoSD

05-15-2006 17:12:55

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Re: SMTA won't turn over in reply to Janicholson, 05-15-2006 09:46:20

I learned the hard way about 20 years ago about shutting fuel off. Had a boat motor with six carbs on it. Left it for 6 mos with fuel off but had not run the carbs dry. All six were badly gummed up (Florida). Now anything I own, riding mower, generator, boat motor, 4 wheeler, motorcycle, snowblower,the fuel gets shut off while running and I run the carb dry. And they all get Stabil treated gas. Downside is once in awhiule you forget to go back and turn off the ignition. But a battery charge is a lot simpler than a carb clean out.(or six)

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GordoSD

05-15-2006 17:12:56

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Re: SMTA won't turn over in reply to Janicholson, 05-15-2006 09:46:20

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