Backhoe Mahindra/Bradco 511 backhoe

[bindian]

My backhoe's hydraulics went dead this evening. I was packing the dirt back at the dam over a water trough supply line. With the backhoe's bucket, I would lift off of the stabilizers and wiggle the boom a little to pack in the clay better. I guess I over did it, as my hydraulics went dead with my front tires in my driveway and the back tires on the dam back slope. I had to crack the stabilzer's lines and jack them up and strapped them up. Then I hung a come along from the ROPS to the dipper stick pivot and cranked the boom up to lock it in the up position, after cracking the boom actuator's lines at the control valve. By then it was 9 p.m. and I still had to fill the rest of the ditch and pack it with the tires. Could the system relief valve stuck in the
open(?) position. My loader is working fine. I have the backhoe running off of the tractor's remotes.

 

[bindian]

Oops! I forgot to include this photo.
hugs, Brandi

 

[SPYDERLK]

Strange. Im sure you checked that your remote lever had not gone to float or maybe centered to the closed position. Did you check the remote plugs to be sure theyre seated? Perhaps it is your bh relief as you are considering. Try to figure out if the bh controls are taking fluid by combining other hyd demands with simultaneous op of bh controls. I think it and the3pt should interfere.
Good luck! I will be interested in your answer to this. That pond is getting nice.
larry

 

[bindian]

Strange. Im sure you checked that your remote lever had not gone to float or maybe centered to the closed position. Did you check the remote plugs to be sure theyre seated? Perhaps it is your bh relief as you are considering. Try to figure out if the bh controls are taking fluid by combining other hyd demands with simultaneous op of bh controls. I think it and the3pt should interfere.
Good luck! I will be interested in your answer to this. That pond is getting nice.
larry

Larry,
Thanks. I was going to swap remotes this morning. I just did. Last night I just wanted to get the hoe stowed with chains, cables, and straps, to finish backfilling the dam and packing it down somewhat, because we were forecast for major showers. I didn't think of swapping remotes until in bed early this morning. The backhoe works again. I don't see anything on the remote that indicates (like on an aircraft) that the relief valve(s) have popped. Do the remotes have a relief valve? I am still under warranty. But the good news is I can put it all back together, wire the second remote handle in the open (fwd) position and use the backhoe.
hugs, Brandi

 

[SPYDERLK]

Good news! Verify fershur that the remote is bad - unlikely. The connector may have been off seat.
larry

 

[bindian]

Good news! Verify fershur that the remote is bad - unlikely. The connector may have been off seat.
larry

Larry,
I put it all back together. Then I swapped back to the oridginal remote and everything worked! Guess it all just needed time for a relief valve to loose pressure and reseat. Don't know.
hugs, Brandi

 

[BobG_in_VA]

Glad you're back in business....Question: When you work the BH a goodly amound does the hyd fluid resevoir (in the tractor under where you are sitting) get pretty hot???Just wondering....BobG in VA

 

[LAWALLSTRACTOR]

Bob,
The 20 series tractors doesn't have the dedicated hydraulic reservoir under the seat like the 00 series did. The 20 and 30 series tractors use the transmission/rear end case for the hydraulic fluid reservoir. They solved a lot of hydraulic heating problems when they made this change as the dedicated sump under the seat was to small and the fluid would overheat with heavy backhoe use. Mahindra had some hyd fluid coolers in the system that helped the problem, but the tranny sump solved the problem.

 

[bindian]

Glad you're back in business....Question: When you work the BH a goodly amound does the hyd fluid resevoir (in the tractor under where you are sitting) get pretty hot???Just wondering....BobG in VA

BobG in VA,
The boom cylinder can get hot enough you can not touch it bare handed. Only with gloves on.
hugs, Brandi