Adding a case drain to skid steer

   / Adding a case drain to skid steer #1  

GaryBDavis

Gold Member
Joined
Dec 12, 2004
Messages
429
Location
Andice, Texas
Finally made the move to a skid steer for brush work around the farm and I need to run a shredder with it. This will be one of those mulching type shredders used to clear underbrush. The newer ones use a piston pump that requires a case drain even though it's a standard flow unit (~20GPM).

My skid steer is a 2011 CAT 279C and just has the standard flow hydraulics with no case drain. The high flow version of this machine comes with a case drain coupler. My plan is to get the case drain coupler and steel line from CAT and then plumb it directly to the tank. I don't want to hack into the factory hydraulic lines. I'll modify my coupler bracket on the loader arm to hold the case drain coupler.

My remaining issue is how to put a fitting on the plastic hydraulic tank. My current thought is to use one of those grommet type hose barbs. You drill a 1/2" hole in the tank, insert the grommet and press in the steel fitting that has a 1/4" right angle hose barb on it. It uses a compression effect to make a leak proof seal (the barb inserted into the grommet has an flared end). These are for fuel tanks so it will handle the hydraulic oil. My only concern is how to drill the hole into the tank. I'm not sure how to keep the plastic shavings out of the oil tank. I know most folks would probably just drill it and not worry about it. There's probably a strainer at the pump intake that will catch any pieces. The pump probably wouldn't bat an eye at a small plastic shaving anyway.

Looking for thoughts/recommendations of anyone who might have done something like this already.

Thanks,
Gary
 
   / Adding a case drain to skid steer #2  
I would be realy suprised if they have different resevoirs for std flow vs high. See if you can find a parts diagram and figure out where the factory line goes. ISZ
 
   / Adding a case drain to skid steer
  • Thread Starter
#3  
They use the same tank but the pumps are different. The high flow pump has a case drain port but the standard flow does not. I talked with CAT technical services. They were helpful and sent me diagrams, but there is no factory case drain for the standard flow, so I have to do it on my own.
 
   / Adding a case drain to skid steer #4  
Your HST drive pumps and possibly also the motors would have a case drain line. Can you tee into that line?
 
   / Adding a case drain to skid steer
  • Thread Starter
#5  
I can see at least one place where the is a low pressure line at the pump. It goes to some other hydraulic device (spooler, valve, etc.). There is an elbow that I could replace with a T, but I'm hesitant to do that since it doesn't go directly to the tank. I really don't want to hijack the hydraulic lines. The only concern I have left with my current plan is to figure out a way to keep the shavings out of the plastic tank when I drill the 1/2" hole.
 
   / Adding a case drain to skid steer #6  
Pack the drill flutes with grease and have the shop-vac running?
 
   / Adding a case drain to skid steer
  • Thread Starter
#7  
That might work. What do you think will happen if I get a plastic shaving or two in the tank? Assuming there isn't a screen filter on the pump intake, I think the pump would turn it into mush with no damage?
 
   / Adding a case drain to skid steer #8  
There will be a strainer in the tank, it's a requirement for any top end hydraulic system and CAT is top end. One other thing you could do is plumb in an air regulator and pressurize the tank to no more than 3 psi. Debris would be blown out while drilling.
 
   / Adding a case drain to skid steer
  • Thread Starter
#9  
There will be a strainer in the tank, it's a requirement for any top end hydraulic system and CAT is top end. One other thing you could do is plumb in an air regulator and pressurize the tank to no more than 3 psi. Debris would be blown out while drilling.

Another good idea. Not sure I have a regulator that is that precise although I'm sure they make them. There is a fill cap and a filtered vent cap that I will have to deal with. The vent cap is threaded. But at 3PSI, I can probably hold that back by hand pressure along with a piece of film wrap and a rag.
 

Tractor & Equipment Auctions

2019 Ford Ranger Pickup Truck, VIN # 1FTER1EH4KLB00278 (A44391)
2019 Ford Ranger...
2014 FORD F-350 (A45333)
2014 FORD F-350...
2010 TEXMEX CONTAINMENT TRAILER (A45046)
2010 TEXMEX...
2018 DODGE RAM 3500 SERVICE TRUCK (A45046)
2018 DODGE RAM...
Case IH 170A Power Unit (A44502)
Case IH 170A Power...
2017 GENIE GS-1930 ELECTRIC SCISSOR LIFT (A45046)
2017 GENIE GS-1930...
 
Top