I have a field find mini backhoe from a shut down manufacturer. The product is a beaver Pro QT50 backhoe used for small tractors, atvs, and pick up trucks. Unfortunately, there's no documentation on this due to its age (as best I can tell it has spent about 20 years in the field). Because it's a field find, I think it needs all new hydraulic hoses, cylinders, controls , fluid, and pump but have no idea what specs these are.
It's a mini backhoe with rotate, lift, bucket, inner arm, and outer arm hydraulic cylinders. Your arm and outer arm measure 4 ft long the rotate and lift hydraulic cylinders are small being about 1.2 in in piston diameter and about two in cylinder diameter. The other three hydraulic cylinders are 1.8 in piston diameter and about 2.8 in cylinder diameter.
The specifications I have been able to find so far are:
- Max lift weight rating of 500-1800 lb, 1845 lb Breakaway Force. I think this means 500 lb when the arm is extended and 1800 when it's fully retracted.
- 1.7 gpm hydraulic pump
- 490 lbs total weight
- 200 bar pressure release valve
- 4hp engine
Unfortunately I don't have a pressure rating for the hydraulic pump or lift capacity of each of the cylinders. How can I calculate these two figures?
Even ballpark figures will help as I'm trying to figure out if I can use electric actuators instead of hydraulics here. If the cylinders only need to have say 2,000 lb of lifting Force then electrical actuators are fine, but if they need 20,000lbs then it would not be worth the cost to buy electric actuators. Even if using hydraulics here, it would be very helpful to know which cylinders to buy.