Most if not all ride on mower manufacturers have their operators manuals available on line. The vast majority of zero turn machines have a 15 degree recommended angle limit. There are other specialized machines that are designed to operate at angles greater than 15 degrees and they usually advertise this advantage. Most vertical and horizontal shaft engines with pressurized lube systems have a 25 degree limit of safe operation.
Zero turn machines for the most part steer by controlling the speed and direction of the rear wheels and no control of the front wheels. Because of this, zero turn machines have a tendency to slide sideways on hills when one or both rear/drive tires loses traction albeit for just a short moment.
I mow a place that has 25 degree hills and I carefully back the machine down the hill and mow up the hill. This is time consuming but necessary however, for both the safe operation of the machine and operator.
Thanks, Mack. I figured that's where the limit was but Snapper is giving me a 20 degree, while all the others are at 15. When I contacted John Deere they couldn't give me an answer. Ventrac has that one machine that can do 30, which seems just crazy, but looking at it in operation, it seems pretty stable.
more important, why do you need to know
Slope ratings can vary depending on the type of ztr you're talking about. It's true that most of the sit down type ztr are rated for 15 degree and can be used on greater than 15 degree if used the way were designed. The Stander type mowers like the Toro Grandstand and some others are rated at 20 degrees and are far less dangerous on slopes than the sit down version.
Why are you asking? Is it a need to know the degree grade or slope that he is mowing before giving a recommendation.
You both are right, thanks for the feedback. I did get plenty of info from most of the manufacturers I contacted. As a thanks, I'll pass this along, just in case you ever need it:
Ventrac's 4500 is rated for a 30 degree slope. Watching those videos online raises the hackles on the back of my neck.
Snapper's and Walker's mowers are rated for 20 degrees.
Hustler has one rated for 25 degrees.
Not what I asked.
He could have had a problem area that needed an out of the square solution like perhas a 2 stroke because the slope is too steep for a 4 stroke to maintain oil suppy ?
He did not state any problem , just asked how to work out slopes.
Before I look for solutios I generally like to know what the actual problem is.
I don't know where you got those figures but Hustler slope ratings are 15 degrees unless you buy there ATZ and Snapper site says.. Operation on slopes can be dangerous. Using the unit on a slope that is too steep where you do not have adequate wheel traction (and control) can cause sliding, loss of steering, control, and possible rollover. You should not operate on a slope greater than a 5.4 foot rise over a 20 foot length (15 degrees). Walker mower recommends a maximum15 degree slope or 26% grade.
Ventrac on the other hand isn't a ZTR mower, they're Articulating Tractors with Attachments. The tractor itself weighs between 1300 and 1700 lbs and if you add the mowing attachment it's like another 400 lbs or more depending on size and there AWD so they shouldn't have a problem with slopes.
Once again this research analyst for an OEM, original equipment manufacturer for mowers, is trying to make us look stupid.
I don't know where you got those figures but Hustler slope ratings are 15 degrees unless you buy there ATZ and Snapper site says.. Operation on slopes can be dangerous. Using the unit on a slope that is too steep where you do not have adequate wheel traction (and control) can cause sliding, loss of steering, control, and possible rollover. You should not operate on a slope greater than a 5.4 foot rise over a 20 foot length (15 degrees). Walker mower recommends a maximum15 degree slope or 26% grade.
Ventrac on the other hand isn't a ZTR mower, they're Articulating Tractors with Attachments. The tractor itself weighs between 1300 and 1700 lbs and if you add the mowing attachment it's like another 400 lbs or more depending on size and there AWD so they shouldn't have a problem with slopes.
I don't know where you got those figures but Hustler slope ratings are 15 degrees unless you buy there ATZ and Snapper site says.. Operation on slopes can be dangerous. Using the unit on a slope that is too steep where you do not have adequate wheel traction (and control) can cause sliding, loss of steering, control, and possible rollover. You should not operate on a slope greater than a 5.4 foot rise over a 20 foot length (15 degrees). Walker mower recommends a maximum15 degree slope or 26% grade.
Ventrac on the other hand isn't a ZTR mower, they're Articulating Tractors with Attachments. The tractor itself weighs between 1300 and 1700 lbs and if you add the mowing attachment it's like another 400 lbs or more depending on size and there AWD so they shouldn't have a problem with slopes.
FROM THE MANUFACTURERS:
1 -
Thank you for contacting Hustler Service.
I have attached a copy of the safety slope information. With the exception of the Super Z ATZ witch is built to handle a 25 degree hill all other Hustler mowers a not to be placed on a slope greater than 15 degrees.
View attachment 27930
2 -
March 15, 2001
RE: Walker Mower Operation on a Side Slope
Dear Walker Operator:
The following recommendations are made for operating a Walker Mower on a slope or
hill: When operating on a slope, reduce speed and use caution to start, stop, and
maneuver. Avoid sharp turns or sudden changes in direction. The maximum
recommended side slope operating angle is 20 degrees or 33% grade.
View attachment 27929
Don't know why you would call me a bully, I would be glad to help you out if you would just answer my questions. Just like when we are trying to diagnosis a running problem on a unit, we need to ask questions to give the most accurate answers. Believe it or not, I have helped a lot of members on this forum even though I like how they post. I have also backed out of a lot of threads because the OP will not help me give the most accurate answer. In this case about slope ratings, there are so many variables involved, questions are asked so that good responses can be given.
I asked:
Ray, why don't you tell us who you work for, exactly what information you are looking for and how you are going to use it. If we are going to do the work for you, the least you could do is to provide us a reason for helping.
I also asked why you won't help us by answering our questions.
Bert asked:
more important, why do you need to know
Ric asked:
Why are you asking? Is it a need to know the degree grade or slope that he is mowing before giving a recommendation.
I believe Ric was asking B**t why he was asking me why I wanted to know, but no matter.
I think your desire to know who I work for is justified, but you're not working for us. That's kind of a silly thing to say. And it's kind of quaint that you expect me to reveal that information. Do you really expect companies to reveal their top secret projects while they're in development? That kind of defeats the purpose, doesn't it? No one is forcing you to participate in my threads. If you don't want to participate in my research, or if you want to engage in your mindless paranoia, please go someplace else. I suspect your nasty comments are preventing other well-meaning people from participating, and that's a shame.
My company has the ability to truly revolutionize the machines you folks will be using in the next few years. I came into this forum to consult you folks, the experts, not to get abused.
Il, once again you are the voice of reason and have made the best post on this thread. I'm going to follow your advice.