Why this constriction in fitting?

   / Why this constriction in fitting? #1  

etpm

Veteran Member
Joined
Jun 30, 2021
Messages
2,045
Location
Whidbey Island, WA
Tractor
Yanmar YM2310, Honda H5013, Case 580 CK, Ford 9N
The hose that comes out of the aftermarket FEL valve on my Yanmar YM2310 and goes to the fluid reservoir has a fitting with a very small hole. The hose is 1/4" I.D. but the hole in the fitting is only about 5/32" diameter. So the flow coming out of the valve is restricted. I checked the other hose fittings connected to the FEL valve and none of them have this constriction. The valve has a power beyond port that is plumbed to the 3PH. The only reason I can think of for the small hole in the fitting is to add some back pressure and that this back pressure maybe has something to do with the power beyond function. Is this correct?
Thanks,
Eric
 
   / Why this constriction in fitting? #2  
Just a flow restrictor to control the cylinders better. I use the same thing on some of my hay tools to slow the descent of the cutting heads.
 
   / Why this constriction in fitting? #3  
Eric
If understanding correctly this was on the tank line and not power beyond. Tank line back pressure would have no effect on power beyond.

Maybe in tank line to reduce drop speed of the loader and or dump speed of the bucket.
 
   / Why this constriction in fitting?
  • Thread Starter
#4  
Thanks 5030 and oldnslo, your explanations make total sense, slowing down the dry speed. I knew I would get the correct info here.
Eric
 

Tractor & Equipment Auctions

UNUSED MOWERKING SKID STEER HD FLAIL MOWER (A50460)
UNUSED MOWERKING...
Ryobi One 18V Cordless Miter Saw (A48837)
Ryobi One 18V...
International 4700 Vibra Tiller (A50397)
International 4700...
2015 International DuraStar 4300 Street Sweeper Truck (A50323)
2015 International...
Caterpillar 48in Forks and Frame Skid Steer Attachment (A49346)
Caterpillar 48in...
(2) RETRO VINTAGE SIGNS (A50459)
(2) RETRO VINTAGE...
 
Top