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post #1 of 34 Old 01-24-2016, 05:07 PM Thread Starter
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new member here from iowa

im new to the page and looking for some information on my bobcat walkbehind snowblower.
The tag on my snowblower say I.D. T4-20-1014
Wisconsin Marine INc. Lake Mills Wis., USA
4 hp briggs & stratton model 100212 type 0261-01 code 7706290.

the snowblower doesnt seem to like the heavy or deep snow like i think it should. its always getting bogged down to the point i have to stop and wait for it to catch up.
I had tried to find a replacement belt for the auger thinking it was too old and slipping, but i am not willing to spend $50 on a single belt as that is more then i paid for the machine.

Any information on how to stop this issue would be great.
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post #2 of 34 Old 01-24-2016, 05:34 PM
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post #3 of 34 Old 01-24-2016, 06:07 PM
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Garage
to the forum stealraine


to the Bob-Cat section

How wide is the auger ??

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Make sure the windows are up before the snow plow goes by !!

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post #4 of 34 Old 01-24-2016, 07:05 PM Thread Starter
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I'm not sure the auger size atm but id say its a 20" just from the id number

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post #5 of 34 Old 01-24-2016, 07:20 PM
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Hard telling without seeing it run - but it sounds like the governor is not adjusted or operating the way it should.


Mark where it's at before you adjust......


congrats on the old Bob Cat - they are cool old machines!




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post #6 of 34 Old 01-24-2016, 08:13 PM
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post #7 of 34 Old 01-24-2016, 08:20 PM Thread Starter
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Quote:
Originally Posted by bad69cat View Post
Hard telling without seeing it run - but it sounds like the governor is not adjusted or operating the way it should. https://www.youtube.com/watch?v=B12rX9pWtTk


Mark where it's at before you adjust......


congrats on the old Bob Cat - they are cool old machines!
thanks ill try that. it just seems the blades aren't spinning fast enough when I look at them. I was wondering what would happen if I tightened or loosened the nut on the Impeller drive?
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post #8 of 34 Old 01-25-2016, 12:00 PM
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Welcome to the forum. I hope we can help. In my limited knowledge of BobcaTs , I wasn't aware they put a 4 hp engine on their machines.I was going to look up the torque clutch spring tension for you but I only have info on 5,7 and 8 hp models . Maybe others can chime in on the use of 4 hp engines. Could you post some pics of the engine output. By your engine code there is no 6:1 reduction on the output. That itself is no problem as the Crary models did not either when they went with Tecumseh engines.I am interested to see the drive train configuration coming off the engine.
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post #9 of 34 Old 01-25-2016, 01:15 PM
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Welcome to the Forum and Congratulations on the Bob-caT!

There were 4 H.P. models built into the late 60's. The 1st stage auger should turn somewhat slowly, while the second stage impeller should spin pretty quickly.
In proper working order, the 4hp versions, like the later 5 hp ones, will chew into heavy snow, but slower than a later machine with the bigger engines.

As said, the governor could be out of adjustment.

Does dis-engaging the drive wheels help at all?

Did you put oil into all of the lubrication points? All of the machine's bearings have lubrication points with little spring loaded caps on the top... they look like the rain flap on the top of a tractor or rig's diesel engine smoke stack. You need to wipe off any grime on them, then oil them with an oil can (think Dorothy and Tin Man). Keep adding W30 oil slowly until you start to see oil weeping out of the bearing centers... DO NOT ADD GREASE!!! It will cause the bearings to lock up when they are cold and will put lots of stress on everything, eventually leading to extra wear and stress cracks.
With the spark plug out, sowly rotate all of the moving parts by hand and see if the bearings turn easily, are stiff, or are sloppy. They should turn freely.

How does the engine run?

If the engine isnt building enough power, it will definately bog out in heavy snow. There could be a number of engine issues that could cause it to act this way. That engine's valves were designed for use with Leaded Gasoline, not today's gas. You could have a valve wear issue a causing power loss under load. Could also be a fuel issue. Being that old, the carb may need to be rebuilt.

Next up would be replacing the belts... dont assume that the belts you find listed online are correct for the machine. There are a number of different belts used over the years and the sizes were not the same... You will need to take off your originals and use those as examples. They are a little tricky to slip on/off past the belt guide fingers, but it can be done if you take your time. Carefully pry gently up on the guide finger, while turning the pulley and pressing the belt past the guide finger, Either in or off., make absolutely sure the spark plug is out of the engine block... you dont want to kick start the engine by turning the pulley over... that would be VERY BAD.

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post #10 of 34 Old 01-25-2016, 01:18 PM Thread Starter
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Here are some photos for you. I'll post more after I'm off work today.
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