Backhoe Question on 3720B backhoe hydraulic hoses

   / Question on 3720B backhoe hydraulic hoses #1  

alia176

Silver Member
Joined
Dec 31, 2013
Messages
176
Location
Tijeras, NM
Tractor
Mahindra 3316HST
Upon receipt of my 3316HST, I've been going through and rerouting Hyd hoses, retorquing all hardware. I found one hose that was installed with the loader located in such a manner that the foot pedal arms were rubbing on the hose. The three additional hoses for the BH were not run to my satisfaction either. Also took the opportunity to color code the hoses with electrical tape: Green = tank, Red = pressure, Yellow = power beyond.

My manuals that came with the 3720B unit isn't very clear so I'm asking the questions here. This is a fairly generic question with regards to adding a BH and the flow of the hyd fluid.

What I'm trying to figure out is when the BH is ready to be separated from the tractor, I should be re-connecting the P or T or PB hoses (on the tractor) but not sure which so the tractor fluid system stays closed.

On any other BH unit separation from the tractor, you have to reinstall a hose so that the tractor fluid keeps flowing in a closed system. This hose is behind the driver seat. That is what I'm trying to figure out on my 3720B since it's different from other BH units. This unit has a large subframe that stays with the BH so all of your hose connections are near the engine.

This pic shows the Pressure (red) and Tank (green) hoses and associated quick disconnect fittings.
102_5515.JPG

Closeup
102_5513.JPG

This pic shows the tractor hyd block and the QD for the PB hose
102_5514.JPG

So, when I disconnect all three hoses for the BH separation, am I suppose to close the system back up by connecting the P to T ?

I hope I made some sense :rolleyes:
 
Last edited:
   / Question on 3720B backhoe hydraulic hoses #2  
Who installed the hoe? I am pretty sure that all the disconnects are suppose to be at the back of the tractor. I know that that is where they are on the newer 3016 & 3616. Do you have the back hoe owner's manual? :confused3: I would think that it would show what is what.

Good luck. ;)
 
   / Question on 3720B backhoe hydraulic hoses
  • Thread Starter
#3  
Who installed the hoe? I am pretty sure that all the disconnects are suppose to be at the back of the tractor. I know that that is where they are on the newer 3016 & 3616. Do you have the back hoe owner's manual? :confused3: I would think that it would show what is what.

Good luck. ;)

BH was installed correctly by the dealer according to the BH installation instruction from KMH.

I wish the manuals showed me what to do with the hoses after the BH disconnect. The 3720B is a different animal and it does not disconnect in the same way as a 3710.
 
   / Question on 3720B backhoe hydraulic hoses #4  
BH was installed correctly by the dealer according to the BH installation instruction from KMH.

I wish the manuals showed me what to do with the hoses after the BH disconnect. The 3720B is a different animal and it does not disconnect in the same way as a 3710.

The P line should loop and connect to the PB line on the tractor when the hoe is removed.
 
   / Question on 3720B backhoe hydraulic hoses
  • Thread Starter
#5  

Tractor & Equipment Auctions

2012 International DuraStar 4400 Service Truck with Crane, VIN # 1HTMKAAN2CH076971 (A51572)
2012 International...
Manac Walking Floor Trailer (A50322)
Manac Walking...
2022 FORD F-150 XL EXT CAB TRUCK (A51406)
2022 FORD F-150 XL...
RV Hitch (A50121)
RV Hitch (A50121)
2015 Ford Escape S SUV (A50324)
2015 Ford Escape S...
New Wolverine72 In Skid Steer Brush Cutter (A53002)
New Wolverine72 In...
 
Top