Trigger steer MTD that pulls to one side - Snowblower Forum : Snow Blower Forums
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post #1 of 12 Old 04-04-2018, 11:57 AM Thread Starter
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Unhappy Trigger steer MTD that pulls to one side

Today I had to pull the old Yardman (31AH553G401) snow chucker out of its summer home due to an early spring snow storm of 8 inches of snow.

The problem that I've been having, which pulling it out of storage reminded me of, is the machine pulling to the right constantly. So much so that it's a chore to keep it moving in a straight line, and it's prematurely wearing out the scraper bar on the same side.

I've tried new skid shoes and adjusting them several times to different heights to no avail. Does anyone know the specifics of the drive and steering system for these units? I had the belly pan off a couple of times to see if anything looks wonky, but nothing jumped out at me.

I really like the blower and would like to keep it, but the struggle is beginning to outweigh the benefit of the machine. If I can get this remedied, then tackling getting to run off of choke (new carb and adjusting didn't solve that) it would be great. Thanks for any help you can provide.

Jamie
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post #2 of 12 Old 04-04-2018, 01:18 PM
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Could it be the tire pressure is not equal?

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post #3 of 12 Old 04-04-2018, 02:04 PM
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Tire pressure is my thought also

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post #4 of 12 Old 04-04-2018, 02:13 PM
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You mentioned trigger steer. Is it possible that one of the clutches for the trigger steer is bound up?
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post #5 of 12 Old 04-04-2018, 02:23 PM Thread Starter
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Quick answer to the above replies:

Tire pressures are equal and just below the max psi on the sidewall.

Both triggers function and I can get the machine to turn on command in both directions. It's a rare occasion when I pull a trigger and the blower doesn't turn, but when that happens I pull back a bit on both handles to provide some resistance to forward movement and it turns like normal.

I've even inspected the bucket to frame connection thinking maybe the bucket isn't mounted straight, but it appears that's OK. I don't see any evidence of the frame being bent either.
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post #6 of 12 Old 04-04-2018, 03:00 PM
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Quote:
Originally Posted by threeputtpar View Post
The problem that I've been having, which pulling it out of storage reminded me of, is the machine pulling to the right constantly. So much so that it's a chore to keep it moving in a straight line, and it's prematurely wearing out the scraper bar on the same side.

Jamie
To my thinking you have already alluded to your problem. Assuming the scraper bar was even to being with, it should wear even regardless, assuming you want it on the ground in the first place (which most don't). First thing I'd do is get a couple of paint sticks, loosen the bolts on the scraper and slip the paint sticks under each end of the scraper and tighten the bolts. Personally I never want the scraper dragging on the pavement in the first place. It's not going to dig the last bit of snow or ice off the pavement. Pavement isn't perfect in the first place and trying to scrape it down isn't going to help.


I'd also give the blower a good going over also. Kind of like a 4 wheel alignment on a car. Insure the everything is oriented correctly in the first place. On a car, it definitely can have a major effect on handling, so why not a blower?

Last edited by HCBPH; 04-04-2018 at 03:10 PM.
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post #7 of 12 Old 04-04-2018, 03:29 PM
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Pulling to one side? Maybe both wheels are not locked? If only one wheel is locked it will pull. For those who are not aware, there's a pin or bolt in one wheel and it needs to go through the hub then through the axle. If you see the pin only through the axle, you have one wheel drive rather than "posi-traction" where both wheels are locked and driving.

1986 Ariens ST522, 5hp, 22"
1995 Murray Craftsman 10hp, 29" w. 12" impeller
A 1983 Real John Deere 10hp, 32" w. 12" impeller, 16" auger, 20" high front, cast iron gear box, chains
Noma 9hp, 27" w. 12" impeller
Noma 5hp, 24" w. 12" impeller, 20" high front
Gravely Convertible, 12hp Kohler cast iron, 26" width, 600 lbs of cast iron & steel, 2 speed impeller, 4 ground speeds
Dynamark 8hp, 26", 12" impeller, for sale
Several other 5hp, 8hp, several 2 cycle, all for sale
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post #8 of 12 Old 04-04-2018, 03:40 PM
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Originally Posted by JLawrence08648 View Post
Pulling to one side? Maybe both wheels are not locked? If only one wheel is locked it will pull. For those who are not aware, there's a pin or bolt in one wheel and it needs to go through the hub then through the axle. If you see the pin only through the axle, you have one wheel drive rather than "posi-traction" where both wheels are locked and driving.

Thought of that but it doesn't account for the scraper wearing unevenly IMO. Maybe try lifting the auger off the ground or just raise the scraper bar and see if that makes a difference. I still think it's running uneven for whatever reason, accounting for the uneven scraper bar wear.
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post #9 of 12 Old 04-04-2018, 04:38 PM
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could the bucket be twisted ?

24 " 1967? Ariens Sno thro
28 " Ariens Sno Tek
Toro CCR ss
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post #10 of 12 Old 04-04-2018, 06:26 PM
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Originally Posted by nwcove View Post
could the bucket be twisted ?
Yep. I'd check the bucket for rust and busted welds. If it's not square then there's your problem.

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