davesisk
Platinum Member
Hi Folks:
I've got a Massey Ferguson 1220 4WD HST w/ FEL on it's way to me shortly, and I'm already thinking about building a mini-backhoe. /forums/images/graemlins/cool.gif I built a front-hoe for my Power-trac and added a hydraulic selector valve to the machine to operate the hoe, so I'm pretty sure I can swing it (pun intended!)
Here's my biggest question though: the MF1220 has 5.8 gpm of hydraulic flow at 2200 PSI (I believe), but only a 2.6 gallon reservoir. What do you think about running a small hoe off the tractor hydraulics? It sure seems like that's an awefully small reservoir (the specs I read could be wrong though). My immediate concern would be this: cylinders hold less fluid when retracted than when extended because of the rod, so part of what the reservoir has to do is compensate for that difference in fluid volume. Assuming I use something like 14" or 16" cylinders (x 2" x 4 cylinders), is 2.6 gallons enough compensation?
I've heard stories of backhoe's damaging a tractor's hydraulic system. What kind of damage? Over-heat the hydraulic pump? Under what cases does this damage occur? The backhoe drains the reservoir, like mentioned above? Does the backhoe create too much heat that can't be disappated quickly enough because of the smaller reservoir? Or is the main problem something like getting dirt into the tractor's hydraulic system from the backhoe? Any insight here would be really appreciated...I'd like to keep this as small, light, and economical as possible, while still ending up with something rugged enough for residential use (no commercial use).
Any URL's or other guidance here appreciated!
Dave
I've got a Massey Ferguson 1220 4WD HST w/ FEL on it's way to me shortly, and I'm already thinking about building a mini-backhoe. /forums/images/graemlins/cool.gif I built a front-hoe for my Power-trac and added a hydraulic selector valve to the machine to operate the hoe, so I'm pretty sure I can swing it (pun intended!)
Here's my biggest question though: the MF1220 has 5.8 gpm of hydraulic flow at 2200 PSI (I believe), but only a 2.6 gallon reservoir. What do you think about running a small hoe off the tractor hydraulics? It sure seems like that's an awefully small reservoir (the specs I read could be wrong though). My immediate concern would be this: cylinders hold less fluid when retracted than when extended because of the rod, so part of what the reservoir has to do is compensate for that difference in fluid volume. Assuming I use something like 14" or 16" cylinders (x 2" x 4 cylinders), is 2.6 gallons enough compensation?
I've heard stories of backhoe's damaging a tractor's hydraulic system. What kind of damage? Over-heat the hydraulic pump? Under what cases does this damage occur? The backhoe drains the reservoir, like mentioned above? Does the backhoe create too much heat that can't be disappated quickly enough because of the smaller reservoir? Or is the main problem something like getting dirt into the tractor's hydraulic system from the backhoe? Any insight here would be really appreciated...I'd like to keep this as small, light, and economical as possible, while still ending up with something rugged enough for residential use (no commercial use).
Any URL's or other guidance here appreciated!
Dave
