Backhoe 110 tlb 7th function hydraulic flow rate?

mechatgsk · Jan 3, 2012

Hi, I was wanting to know if anyone knows the flow rate for the 7th function valve on the 110 tlb? The reason I'm asking is I am looking at buying a backhoe mounted flail mower/shredder. I was also wanting to know how the 7th valve is used for this type of equipment? Does it have to be constant flow or just how does it work? Any help is always appreciated!

Regards,
mechatgsk

AKfish · Jan 4, 2012

The front and rear 3rd SCV are available at full system pressure (3000psi) and 11gpm to operate hydraulic motors.

The 7th hydraulic function available on the backhoe is operated via the pedal on the footrest platform of the backhoe and operates at 2400psi. I believe it also has a rated flow of 11gpm.

I considered a loader mounted rotary cutter (Bobcat) for my 110 but discovered the minimum flow rate required was 15gpm. Same for the hydraulic (post hole) auger.

AKfish

mechatgsk · Jan 4, 2012

Hey AKfish,
Thank you for the information. Here are the links to some mowers I am concidering. US Mower -EX30 Samurai Flail Mowr - Direct Drive and 30EX Flail Brush Mower - Excavator Style Mount by RockHound. Both require a minimum of 8 GPM oil flow.

Regards,
mechatgsk

jenkinsph · Jan 4, 2012

I beg to differ on the hydraulic flow rates. The front auxillary flowrate is 12gpm and the 7th function on the backhoe is 16gpm. That is why the backhoe is rated to operate the PA30 hydraulic auger and the ssqa is not rated for this. I checked on all of this prior to buying the PA30 early last year.

AKfish · Jan 5, 2012

It's certainly OK to have a difference of opinion.. however, if you'll review page 515 in the Technical manual for the 110 you'll note that the combined flow of the main and auxiliary hydraulic pumps is 14.86gpm (new) and the minimum combined flow is 11.89gpm.

So, the best you could hope to get at the backhoe would be when the tractor is right off the lot - 14.86gpm - not 16gpm.

Also please note on page 483 that the total flow available to the loader is 10.5gpm - not 12gpm.

However, it does not state in the Technical manual what the combined flow rate is for the 7th function on the hoe - just that the pressure relief circuit is set at 2400psi. So, Steve could well be correct that the flow rate is higher than my "estimated" 11gpm.

AKfish

jenkinsph · Jan 5, 2012

All good points AK, when I was looking for the PA set up I tried out a front mount unit and it turned so slow I couldn't sling the dirt off the auger bit. The rear mounted unit is faster but no speed demon. I just started a fence project at home Monday, great improvement over my older 3ph model.

My flow rates of 12 and 16 gpm is what the dealer told me

AKfish · Jan 5, 2012

jenkinsph said:
All good points AK, when I was looking for the PA set up I tried out a front mount unit and it turned so slow I couldn't sling the dirt off the auger bit. The rear mounted unit is faster but no speed demon. I just started a fence project at home Monday, great improvement over my older 3ph model.

My flow rates of 12 and 16 gpm is what the dealer told me

My last pole-barn project - wanted to use a 30" hydraulic auger for the holes. Rented the SSQA auger from the local Deere folk's (they thought it "might" work) to use on the 110.

Same results that you experienced - turned so slow that it wouldn't clean off the bit. Luckily, my buddy has a 753 Bobcat and that did the trick! The difference between the 110 performance and the 753 wasn't "night and day" but just another couple of RPM's.

If you read the sales brochures, etc. there's alot of confusion regarding the capacities! And the Owner's Manual states the hydraulic rates as "Theoretical*... Of course, the flow to the loader is rated at 12.2gpm and the backhoe is rated at 16.3gpm.

Then, you go to the Technical Repair manual and the rating's are more "real world" 'cause that's what the mechanics have to work with when measuring and metering to determine if something is or is not functioning correctly.

The lower capacities are what's listed in the Technical manual...

Whenever you talk to a salesman - always verify - with the manual's that line the wall in the shop foreman's office!! :thumbsup:

AKfish

jenkinsph · Jan 5, 2012

Having to install the gates I build the hoe mounted PA30 has really helped. Some of the places I needed to drill were hard to get to with the ssqa models. I need to get an 18 to 24" bit but thats more money. In a nutshell the PA 30 has saved alot of time and labor in the past year so I am satisfied with it.

AKfish · Jan 5, 2012

jenkinsph said:
Having to install the gates I build the hoe mounted PA30 has really helped. Some of the places I needed to drill were hard to get to with the ssqa models. I need to get an 18 to 24" bit but thats more money. In a nutshell the PA 30 has saved alot of time and labor in the past year so I am satisfied with it.

The backhoe mounted auger certainly adds a whole dimension to the capability of the 110! If I were landscaping more (tree planting, etc.) or erecting fences and building more pole-barns... :laughing: the PA30 would be a "must have"!

One of the bigger PITA's with the pole barn work was being able to maneuver the tractor in amongst the rows of holes! Having a 13ft reach off the end of the dipperstick would be a definite plus.

AKfish

dsh82 · Jan 7, 2012

Ak,

I also have a 110 and noted you were talking about the tech manual. I was going to order the manual from deere (tm1987 correct?). Its a little on the expensive side (145 bucks for pdf). How concise is the manual and how much detail does it go into? Ive read other deere publication and always found them to be very well written. Just want to make sure this manual is worth it.

Thanks,

Dan