318 Hydraulics

HarryD · Dec 22, 2011

I have a old, gas driven, welder/generator with a mechanical fuel pump that is hard to start if it has not been started for an extended period of time. This is not a problem as long as I have electric service. I simply use a heavy duty electric drill to crank it when the battery is weak. This is not an option when I loose electric service and need the emergency generator.

I am currently using the right hand hydraulic lines on my 318 to lift my snow plow. However, the left hand lines are not being used. I am looking at the option of using these lines to power a hydraulic motor to be used as a back up starter for the welder/generator when the power is out. Does anyone know the GPM and pressure availible at the front hydraulic lines on a 318?
HarryD

oldnslo · Dec 22, 2011

HarryD said:
I have a old, gas driven, welder/generator with a mechanical fuel pump that is hard to start if it has not been started for an extended period of time. This is not a problem as long as I have electric service. I simply use a heavy duty electric drill to crank it when the battery is weak. This is not an option when I loose electric service and need the emergency generator.

I am currently using the right hand hydraulic lines on my 318 to lift my snow plow. However, the left hand lines are not being used. I am looking at the option of using these lines to power a hydraulic motor to be used as a back up starter for the welder/generator when the power is out. Does anyone know the GPM and pressure availible at the front hydraulic lines on a 318?
HarryD

for reference my son's 400 JD was around 2 - 2 1/2 GPM and 700 PSI. Not sure what the 318 puts out.

aczlan · Dec 22, 2011

You might get 2gpm at 1500psi out of that (cant find specs on it)
What do you have for parts?
What make and model is the engine?
How big (hp or amp draw) is your current drill?
Do I understand correctly that it currently has a starter?
Minimum price to setup a hydraulic motor/hoses would be $80 (motor is $50+, lines will be at least $20 and fittings will be another $10 or more)
If you already have a drill that works, how about an inverter that you run off your tractor or car battery?
If it already has a electric starter, how about a set of heavy jumper cables with Anderson connectors in place of clamps to run it off of your tractor/car battery?
Or a battery tender on the current battery so that it is always topped up?

Aaron Z

HarryD · Jan 1, 2012

Aaron Z, thanks for the information. In answer to your questions.
I don't have any parts, but have a rather complete machine shop.
My tractor has an Onan, 2 cylinder, 18 HP engine.
The electric drill I am using is an old Craftsman Commercial 1/2" listed as drawing 6 amps.
The welder/generator does have an electric starter.
Using an inverter to power the electric drill is my first choice. However, electric motors draw approximately 3 times their operating current when starting, particularly with a heavy load, (it takes the drill about 5 to 10 seconds to bring the engine up to cranking speed). Hence, I would need an inverter that produces a minimum of 18 amps and I have not been able to locate one with that much current capacity.
I have tried jumper cables, but I do not have a set of Anderson Connectors.
The battery "tender" is an option, but still requires maintaining a full sized battery, and replacing it every 3 or 4 years. If I can find some way of cranking the engine, I can supply ignition voltage with a couple of dry cells if I have to.
HarryD