Age : 17 Join date : 2021-09-25 Points : 797 Posts : 57 Location : Northwest Iowa
Subject: Dynamark offroad mower February 7th 2022, 5:58 pm
This is my dynamark that I pulled from a shed after 20 years. I built it with 27 inch rear tires. This is the 1st tractor i ever built. Unfortunately the 930 transaxle broke yesterday so a build is to come in the spring
I plan on replacing the 12hp Briggs with a 20hp opposed twin and adding different wheels and tires and possibly an 820.
Last edited by Joe_the_mower_man_1320 on February 7th 2022, 5:59 pm; edited 1 time in total
Joe_the_mower_man_1320 New Member
Age : 17 Join date : 2021-09-25 Points : 797 Posts : 57 Location : Northwest Iowa
Subject: Re: Dynamark offroad mower February 7th 2022, 5:59 pm
Joe_the_mower_man_1320 New Member
Age : 17 Join date : 2021-09-25 Points : 797 Posts : 57 Location : Northwest Iowa
Subject: Re: Dynamark offroad mower February 7th 2022, 6:05 pm
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Age : 44 Join date : 2019-07-02 Points : 3590 Posts : 1896 Location : Ontario, Canada
Subject: Re: Dynamark offroad mower February 7th 2022, 6:33 pm
Cool mower dude I like the low and wide stance! Ouch... that hurts, get er fixed so we can see more! Lol
Subject: Re: Dynamark offroad mower February 7th 2022, 7:43 pm
The wide stance mowers seem to always snap the axles, too much stress I guess
Joe_the_mower_man_1320 New Member
Age : 17 Join date : 2021-09-25 Points : 797 Posts : 57 Location : Northwest Iowa
Subject: Re: Dynamark offroad mower February 7th 2022, 9:28 pm
The Wheels may come back on a future project but I am unsure at this point
mr.modified Veteran Member
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Subject: Re: Dynamark offroad mower February 7th 2022, 10:28 pm
You could probably make a brace to hold the bottom bolts of the transmission. That way even with the wider tires it wouldn't spread out like that and crack the case.
Subject: Re: Dynamark offroad mower February 8th 2022, 12:12 pm
The makers don’t plan for our rough treatment, but WE can plan for it.
A gusset and plate outside the frame could pick up all 4 bolts out there and probably prevent such mayhem. A lower cross brace could be added too.
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Subject: Re: Dynamark offroad mower February 8th 2022, 2:35 pm
I’ve always been of the mindset that the best way to do a setup like this is a doc locker/live axle and to put some bearings and build an axle housing out of steel tube. I don’t know if I explained that good but I hope it helps. Might be Monopoly money but it’s my 2c
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Age : 17 Join date : 2021-09-25 Points : 797 Posts : 57 Location : Northwest Iowa
Subject: Re: Dynamark offroad mower February 8th 2022, 7:12 pm
Thanks guys for all the feedback!!! Does anybody know if an 820 will fit in a dynamark 12/39
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Age : 48 Join date : 2016-09-06 Points : 13888 Posts : 9809 Location : Oklahoma
Subject: Re: Dynamark offroad mower February 8th 2022, 7:24 pm
Yeah, @redzz02 has one in his I believe. The mud dynamark build somewhere.
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trentonkamel
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Subject: Re: Dynamark offroad mower April 30th 2022, 6:52 am
A very nice model, I haven't seen such on sale for a long time. I like that you repair it yourself; rarely will anyone undertake the repair of such equipment. I usually don't mess with this and just pay specialists to fix this piece of equipment for me. I recently ordered equipment for the farm, and I hope that I will not encounter any breakage soon since I paid enough money to not know the problems. I would also like to know who of you also ordered something there and whether everything is fine with your equipment after some time
Joe_the_mower_man_1320 New Member
Age : 17 Join date : 2021-09-25 Points : 797 Posts : 57 Location : Northwest Iowa
Subject: Re: Dynamark offroad mower May 4th 2022, 11:00 am
An Update of sorts, I Guess, So the dynamark has not been worked on and will be getting some upgrades soon. All I have done is move it to the barn so its not taking up any valuable room for my truck project. So Upgrades SOON!
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Age : 17 Join date : 2021-09-25 Points : 797 Posts : 57 Location : Northwest Iowa
Subject: Re: Dynamark offroad mower September 20th 2023, 12:23 pm
Its has surely been a long while, Started work on the ol rig here recently. So i Decided in early august to gut one of my other tractors because she was totaled mechanically. The Old huskee ( Code name ladybug) was gutted for her wheels rear transaxle. The while it was out i had decided to pulley swap it. Using random crap lying around, i made it go about 26 mph
(Featured in this photo are my 78 ford shortbed and the dynamark mower)
Anybody have an idea for breaks on this think? The tranaxle breaks do not work. Any ideas are welcome.
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Subject: Re: Dynamark offroad mower September 20th 2023, 8:30 pm
Old Ford’s a sweetheart!
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Joe_the_mower_man_1320 New Member
Age : 17 Join date : 2021-09-25 Points : 797 Posts : 57 Location : Northwest Iowa
Subject: Re: Dynamark offroad mower September 20th 2023, 10:37 pm
Shes a sassy old ferd for sure, very temper-mental
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Age : 17 Join date : 2021-09-25 Points : 797 Posts : 57 Location : Northwest Iowa
Subject: Re: Dynamark offroad mower September 22nd 2023, 1:21 pm
Ok, took the Dynamark out for a ride the other day and it definitely needs some brakes. Anybody have an idea for that?
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Age : 48 Join date : 2016-09-06 Points : 13888 Posts : 9809 Location : Oklahoma
Subject: Re: Dynamark offroad mower September 22nd 2023, 1:29 pm
Brakes have always been my Achilles with the shift on the go transaxles. I think @RichieRichOverdrive has had some luck upgrading.
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Subject: Re: Dynamark offroad mower September 22nd 2023, 7:31 pm
I've seen a few good methods done. The most effective one is attaching (to the stock disc) a band brake or hydraulic disc brake to the stock location. The gear reduction of the transaxle makes those work really well. The easier method is to attach a brake rotor to the axle and add hydraulic brakes there. I have an ex250 caliper and master cylinder on Mutt and it works just kind of ok. They at least don't wear anywhere near as fast as stock brakes, at least with OEM brake pads. The advantage to hydraulic brakes in the stock location is that you can use a smaller light duty setup like that from a pit bike or moped or what have you.
Age : 44 Join date : 2019-07-02 Points : 3590 Posts : 1896 Location : Ontario, Canada
Subject: Re: Dynamark offroad mower September 22nd 2023, 10:20 pm
Unless you've locked the rear axle brakes aren't super effective at any kind of speed or going downhill anyhow, one wheel will lock up and the other will roll and it can actually put you into a slide. I'd just try to get them working best I could, you can make new pads out of car/truck pads but be careful to not breathe in the dust created by modifying them to fit!
If you want GOOD brakes, you can install cheapo offshore atv front drums on the front wheels...I've done it but am not the first and let me tell you that they're awesome!