mikehaugen
Elite Member
yeah but with duals on the rear aren't you technically always running in 4wd?
... sorry, I couldn't help it
4wd?
- Thread starter Surgeon
- Start date
yeah but with duals on the rear aren't you technically always running in 4wd?
... sorry, I couldn't help it
Greetings : I've been looking far and near on the cyber treads trying to find 4wd specifics. Been a 4wd drive owner for 40 of my 60. Truck and tractor. All been get wet and lock to the toggle from the cab lock. Up to this point I have known the do's and wish I didn't. Well I cannot determine whether the new JD 758 4wd will be able to cut grass while turn and return on dry pavement. It appears it is full time. Any you folks have any suggestions or comments. Thanks
jenkinsph
Super Star Member
The traction with these mowers is great, no issues imo. No scuffing in sharp turns, no grass to repair, seems to go everywhere I wan't to go.
My understanding is similar to others.
This is my general guide, but there are no set rules. This is based on the "common" usage of terms around here.
4wd/AWD - is the large tractors that all 4 tires are the same size. They may steer by wither turning the tires or articulation of the frame.
MFWD - Mechanical front wheel drive, or assist. These are row crop all the way down to the small compacts. You can select to put power to the wheels or not. As others have said, my understanding and experience is the front tires turn a little faster than the back. Kubota even has "bi-speed" where once the wheels turn past a certain point they speed up even more. Deere has "caster action" which the front wheel lean into a turn which for a couple of reasons helps with turning. Some have called it others things some have open, limited slip or locking front ends.
HFWA/HFWD - Hydraulic front wheel assist is a system like some road graders have where hydraulic motors are used in the front wheels. This gives a very tight turn. The problems were because the rear tires were driven by the trans and the front by hydraulics the speed difference was usually a large amount. The Deere system had a 2 speeds but you also had large changes with engine speed. This was used on the 20, 30, and 40 series Deere row-crop tractors. I believe Oliver and Allis Chalmers among others also had systems similar. The biggest problem was if left on it would get very hot and put enough power to the tires. It is still used today on most brands of combines and forage harvesters, but both ends are hydraulic driven. That seems to work much better being the system isn't fighting it's self.
There are some less common systems out there.
This is on the front tires being faster.
Frequently Asked Questions | Firestone Agricultural Tire
This is my general guide, but there are no set rules. This is based on the "common" usage of terms around here.
4wd/AWD - is the large tractors that all 4 tires are the same size. They may steer by wither turning the tires or articulation of the frame.
MFWD - Mechanical front wheel drive, or assist. These are row crop all the way down to the small compacts. You can select to put power to the wheels or not. As others have said, my understanding and experience is the front tires turn a little faster than the back. Kubota even has "bi-speed" where once the wheels turn past a certain point they speed up even more. Deere has "caster action" which the front wheel lean into a turn which for a couple of reasons helps with turning. Some have called it others things some have open, limited slip or locking front ends.
HFWA/HFWD - Hydraulic front wheel assist is a system like some road graders have where hydraulic motors are used in the front wheels. This gives a very tight turn. The problems were because the rear tires were driven by the trans and the front by hydraulics the speed difference was usually a large amount. The Deere system had a 2 speeds but you also had large changes with engine speed. This was used on the 20, 30, and 40 series Deere row-crop tractors. I believe Oliver and Allis Chalmers among others also had systems similar. The biggest problem was if left on it would get very hot and put enough power to the tires. It is still used today on most brands of combines and forage harvesters, but both ends are hydraulic driven. That seems to work much better being the system isn't fighting it's self.
There are some less common systems out there.
This is on the front tires being faster.
Frequently Asked Questions | Firestone Agricultural Tire
Mechanical Front Wheel Drive tire recommendations for best performance