Sight glass

   / Sight glass #1  

redman1533

New member
Joined
Apr 14, 2025
Messages
1
Tractor
Massey ferseson 1533
My eyes are bad, I repaired leak in line, it's so hard to tell fluid in the glass, I may overfilled, or lost way more than I thought..is there any kind of a trick with a colored light? Permatran 3 is hard to tell, wish it had a dip stick.
 
   / Sight glass #3  
Most all hydraulic fluids are hard to see but you can purchase oil dye to color it, I believe on Amascon or your local JD dealer. I say most, but not all. I use Chevron All Weather THF synthetic which comes pre dyed in orange of all things and it's easy to see in a sight glass or on a dipstick.
 
   / Sight glass #4  
ON my MF GC1715 the background color od sight glass is silver, if fluid on in sight glass the portion of background covered takes on a greenish cast.... Otherwise hydraulic fluid die is going to help....
 
   / Sight glass #5  
ON my MF GC1715 the background color od sight glass is silver, if fluid on in sight glass the portion of background covered takes on a greenish cast.... Otherwise hydraulic fluid die is going to help....
Mine also is silver; I had the same issue as the OP long ago and didn't realize that I was overfilling because the oil was just barely golden. You don't realize the difference till you've taken a good look at it both ways, and probably don't fully get it until it's too late.

The good thing is that overfilling is at worst going to make a mess when the fluid heats up, expands and then you go up a hill and it blebs out the filler tube...
 
   / Sight glass #6  
I agree...had sight glass L2800HST seem I was always checking the level. 🙄
 

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