You would need friction between the tires or tracks and the dirt the tractor is sitting.
If you have extended legs, you need friction between the pads and the ground.
You would want friction in the brakes.
A clutch also relies on friction.
Technically you could "dig water", but if you are trenching, then one needs friction between the dirt particles.
It is also handy to have friction in your seat, steps, and controls.
The only friction in a loader would be in the pins, bushings and cutting surfaces.
its hydraulic.
friction is an important force to have in life because friction helps objects that move or roll stop. Like brakes on a car, when you push down on the brakes the friction is there when the wheels stop,and the car will stop to.
The coefficient of kinetic friction between wool felt and aluminum is about 0.24 to 0.26.
If it is the hydraulic cylinder itself you will have to replace it. If it the boom arm a capable welder should be able to repair it.
You need to know both material involved in the friction to find the coefficient
http://www.howstuffworks.com/backhoe-loader.htm offers a comprehensive how-to for running a backhoe loader.
A good backhoe loader can cost up to $500.
You can purchas a backhoe loader at any John Deere stores located near you.
The website RocksAndDirt.com offer many backhoe loader and you can buy them online.
A backhoe loader is the big yellow tractor with the shovel on the front and the scoop on the back. I'm sure you've seen a backhoe loader, as they are extremely common. They are used for plowing snow, digging holes and in a variety of construction projects.
The main machine used in backhoe construction is a backhoe loader - a tractor fitted with a deep shovel in the front and a backhoe in the back. This type of construction is common in urban areas due to the relatively small size of a backhoe loader.
its hydraulic.
The Backhoe Loader (or "Digger" in the UK) was invented in the UK by JCB in 1953
29 gallons with loader and backhoe.21 with loader only.25 with loader and 3 pt hitchReservoir refill with filter change is 17.
There are a few places to purchase a backhoe loader. You can get a great deal on them at Ebay. You can also find them at Machinery Zone, Rock and Dirt, and Terex.
You can find one on the www.rentalsite.com
9500 lbs