Hydraulic lines

[richn]

I am looking to replace the lins on my MF 202
It has 3/8, 1/2, and 3/4 lines
Most have a male NTP at one end and a male oring on the other end that screws right into the cylinder. Looking at the hose at suplus supply, it seems that for a give size hose the oring fillting can come in diffferent sizes ...... 4M, 5M etc, how can I determine which size I need ?

 

[Mith]

Take the old one with you, and ask them to match it.

The fittings I have bought had what they were stamped on the outside too.

 

[DieselPower]

Like Mith said most hydraulic hose fittings are marked somewhere. Not all but most. If all else fails take the old ones with you and have new ones made.

 

[shaley]

If you want to order online here is a size chart for fittings.
You will probably need calipers to get a close enough measurement to tell one size from the other.
Discount Hydraulic Hose.com
The dash size method is just based on 16th -08 = 8/16 or 1/2.