hydraulic hoses - fittings leaks?

[Brockport Bill 1,824]

i posted a thread a couple weeks ago about a lift valve leak on a C175, Series 2 -- but i have a different related question? I have replaced the O rings inside the lift valve unit as well as replacing the O rings on all the respective hose fitting ends - I am assuming and hopeful that i have now "repaired" the leak from the lift valve itself or a hose coupling thats been causing the oil dripping from the lift valve unit area? - it was impossible to determine where exactly the leak was coming from????? Here's my new question since this is a new venture to me ------------ how do i know its NOT the fitting itself on the end of the hose that is leaking at its own joint???????? The fittings or couplings have a swivel and therefore a joint - so how can i determine it isnt the fitting itself leaking ? Sure don't want to re-assemble the tractor only to learn the new O rings did not correct the leak????? And certainly I want to avoid expense of new hoses, fittings etc unless necessary. Is there such a thing as a vendor/store/repairshop that somehow does pressure tests? Is it common, or not common, for the fitting/coupling itself other - than worn O rings - to leak -- after all the hoses and the fittings are likely original from 1980? thanks for any insights!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

[Pullstart 64,516]

Get you some cheap electric tape.  Wrap all suspected fittings / hose ends.  See what bubbles.  That’s what I’d do 

[Brockport Bill 1,824]

the valve and hoses are out of the tractor - so i am not sure what you are suggesting with the electric tape??????? 

2 minutes ago, Pullstart said:

Get you some cheap electric tape.  Wrap all suspected fittings / hose ends.  See what bubbles.  That’s what I’d do 

 

[Brockport Bill 1,824]

some lift valve photos and hoses attached

[Pullstart 64,516]

26 minutes ago, Brockport Bill said:

the valve and hoses are out of the tractor - so i am not sure what you are suggesting with the electric tape??????? 

 

oh, I thought it was still under pressure / leaking.

[Brockport Bill 1,824]

below is photo of the internal lift valve piston shaft

[Joe Shmo 158]

I have a C125(1981) and the hoses were wore out and leaking. I replaced all of them and no more leaks 

[953 nut 57,872]

Your ORB "O" ring fittings should be torqued to about 225 inch pounds when installed. I guess you could fabricate a cap for one end of the hose and an adapter to connect to an air hose fitting to the other end to give them a pressure test.

[JPWH 6,251]

A hydraulic repair shop should be able to test your hoses but you can replace them for what the test would cost 

[peter lena 9,087]

@Brockport Bill  https://products.swagelok.com/en/all-products/fittings/c/100?  we used these every where ,  hose make up shop  probably has them in stock , so you could connect with hose or tube ,  no failures . plan on "  working areas "  for  no  stress  operation .  bombproof  operation , pete 

[pfrederi 18,324]

Old swivel fittings will eventually leak The more they swivel/move the sooner they wear out and leak  Repair by replacement ... or unless it is a big leak I live with it it is a form of corrosion control

[Brockport Bill 1,824]

6 hours ago, peter lena said:

@Brockport Bill  https://products.swagelok.com/en/all-products/fittings/c/100?  we used these every where ,  hose make up shop  probably has them in stock , so you could connect with hose or tube ,  no failures . plan on "  working areas "  for  no  stress  operation .  bombproof  operation , pete 

 

2 hours ago, pfrederi said:

Old swivel fittings will eventually leak The more they swivel/move the sooner they wear out and leak  Repair by replacement ... or unless it is a big leak I live with it it is a form of corrosion control

i am taking old hydraulic hoses to a shop tomorrow --- will see if they can pressure test the 4 hoses to identify which fitting is leaking - and get quotes to replace either leaky one or all 4