L3901 Rear Wheel Spacers?

dnorm

New member

Equipment
L3901
Oct 6, 2021
3
0
1
Virginia
Hi OTT - new L3901 owner here! Have read many posts on here in my decision making to purchase this machine. Really useful and helpful information and community on this forum.

Our property is on the ridgeline of a mountain and it's quickly become apparent to me that the 3901 can be a bit tippy horizontally. The machine has R4 filled tires, does not have a rear implement, mainly moving logs, firewood, moderately sized rocks and land with bucket and grapple.

We are operating the machine as recommended, loaders loads low as possible, straight up and down any hills and never side to side...even with the recommended operating modes, the terrain is still mountainous and not a pasture, or a flat field otherwise.

I would really like to increase stability with some rear wheel spacers...Likely going to go with Bora as BroTek only seem to come in up to 2" widths for my model.

What is the recommendation on suggested width to provide a significant increase in horizontal stability (decreasing that feeling of tippiness)? I'm thinking 4" per wheel is the answer here, but wanted to get some feedback from this community. The additional 8" of overall wheel base width does not impact our ability to use the tractor (parking storage, access to narrow gated areas etc). Are there any other upsides or downsides to going wider or less wide?

Any and all thoughts appreciated!

Thanks!

dave
 

jimh406

Well-known member
Lifetime Member

Equipment
Kubota L2501 with R4 tires
Jan 29, 2021
799
510
93
Western MT
It’s hard to quantify how wide to go before you feel it. I think you’d get a lot of stabilty with a low and wide implement as well. I have the factory 1” spacers on my L2501. I noticed a significant difference with a wide rear implement compared to having nothing, and I have loaded rear R4s as well.
 
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dnorm

New member

Equipment
L3901
Oct 6, 2021
3
0
1
Virginia
Thanks for the reply and info Jim! Hope to procure something like a box blade for the back soon...these aren't the widest implements but should add around 300 lbs or so and hang nice and low...this would be in addition to the spacers.

Have been doing some additional research online, and am waiting for an email from my dealer...does anyone know definitively if installing wheel spacers impacts the Kubota warranty at all? Interestingly enough, I've seen a few folks talk about buying Bora spacers directly from their Kubota dealer, so I'm hopeful it does not void the warranty.

Thoughts? Word on this one way or another?
 

old and tired

Well-known member

Equipment
L2800 HST
Dec 8, 2019
704
266
63
NC / S.W. Virginia
Never heard of a problem with spacers since 2005 from this or TBN forum.

I would also say that areas that I thought I would tip over (several years ago) now seem so easy to transverse without spacers... I bought 1" spacers but have yet to install them.

Farmers near me harvest hay on slopes that I would never dream of driving on... also, 4" seem pretty excessive.
 

BigG

Well-known member

Equipment
l2501, FEL, BB, Rotary cutter, rake,spreader, roller, etc. New Holland TL80 A
Sep 14, 2018
1,727
548
113
West Central,FL
You state that you are using the bucket and grapple without anything, ballast, hanging off the back of the tractor. This needs to stop! The stability of the tractor results from a properly ballasted tractor. Traveling down hill with a loader full of dirt or a log in the grapple makes the rear wheels very light and gives very poor braking. Sideways without the ballast is not a good practice either.

The use of the FEL with out ballast may cause damage to the front axle. This will not be covered by your warranty. Also without the rear ballast there is addition weight transferred to the front tires. This will add stress to the sidewalls of the tires as you transvers the slopes.

I urge you to properly ballast your tractor before you have a serious accident.
 
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TheOldHokie

Active member

Equipment
L3901/LA520, B7200DT/LA1630, G2160/RCK60, G2460/RCK60
Apr 6, 2021
507
196
43
Myersville, MD
Hi OTT - new L3901 owner here! Have read many posts on here in my decision making to purchase this machine. Really useful and helpful information and community on this forum.

Our property is on the ridgeline of a mountain and it's quickly become apparent to me that the 3901 can be a bit tippy horizontally. The machine has R4 filled tires, does not have a rear implement, mainly moving logs, firewood, moderately sized rocks and land with bucket and grapple.

We are operating the machine as recommended, loaders loads low as possible, straight up and down any hills and never side to side...even with the recommended operating modes, the terrain is still mountainous and not a pasture, or a flat field otherwise.

I would really like to increase stability with some rear wheel spacers...Likely going to go with Bora as BroTek only seem to come in up to 2" widths for my model.

What is the recommendation on suggested width to provide a significant increase in horizontal stability (decreasing that feeling of tippiness)? I'm thinking 4" per wheel is the answer here, but wanted to get some feedback from this community. The additional 8" of overall wheel base width does not impact our ability to use the tractor (parking storage, access to narrow gated areas etc). Are there any other upsides or downsides to going wider or less wide?

Any and all thoughts appreciated!

Thanks!

dave
I am travelling the same road. As O&T observed some but not all of the tipsy concern goes away after some usage. I have a several months in the seat, loaded R4 tires, and 700# on the rear and the tractor still lacks the stability I am accustomed to with my other tractors. I can set the old Ford so wide its like it has outriggers. I hate the fact the R4s are not adjustable and if it were not for the lead times being quoted I would have added spacers months ago. The R4s are a good bit wider cross section than R1s and 2" spacers with R4s will get you roughly the same out to out as R1s set to the max track. Thats my plan and I'm sticking to it.

Dan
 

dnorm

New member

Equipment
L3901
Oct 6, 2021
3
0
1
Virginia
You state that you are using the bucket and grapple without anything, ballast, hanging off the back of the tractor. This needs to stop! The stability of the tractor results from a properly ballasted tractor. Traveling down hill with a loader full of dirt or a log in the grapple makes the rear wheels very light and gives very poor braking. Sideways without the ballast is not a good practice either.

The use of the FEL with out ballast may cause damage to the front axle. This will not be covered by your warranty. Also without the rear ballast there is addition weight transferred to the front tires. This will add stress to the sidewalls of the tires as you transvers the slopes.

I urge you to properly ballast your tractor before you have a serious accident.
Appreciate the concern, and message received. As suggested, working on procuring rear ballast...we do have rear tires filled, which was the dealer recommended rear weight after discussing use cases. Sooner than later we will procure a rear implement to add weight.