Hydraulic Vs Turbine

[ShroderRw]

We are testing two GE gearboxes and were told to use a ISO 20 Turbine oil. We were unable to procure this in the time we needed to test and used an AW hydraulic oil 32 in it's place. When tested we could not read any oil pressure which should be to our knowledge around 15-20 PSIG. If using turbine oil at ISO 20, will we still encounter this problem?

First time user, appreciate any help!
Ron

 

[salesrep]

The difference between Iso 20 and 32 could make a diff in psi.
Find a iso 20 hy or turbine fluid

 

[tom slick]

Did you give GE a call?

 

[ShroderRw]

No, on the contact with GE. We had these rebuilt through a company and asked them for the info. Getting info from GE is like finding WMD in Iraq. Thank you.

 

[salesrep]

Iso 22

 

[bruce381]

Oil pump or filter or air block problems? if all systems are correct you should get some pressure in fact 32 may give more than 22.
bruce

 

[Shannow]

Do you have no pressure, or no indication of pressure ?

Bumping the unit with a technician and a gauge calibration set can tell you whether it's safe to run for a quick diagnostic check.

What's the gear set ?

 

[widman]

They may mean ISO 22, but if they are making mistakes, who knows what they meant. I got to see a gearbox last month that clearly said SAE 120. No such animal. I wrote the company. Turns out they needed ISO 150.

ISO 32 is 50% more viscous than an ISO 22. ISO 22 would work well in something that called for a VG 20 (20 cSt @ 40c). Covers 10% up and down from 22.

Once upon a time (+/- 20 years ago) there were all kinds of viscosities. Then ISO normalized them in 22, 32, 46, 68, etc. There are still old pieces floating around that require in-between solutions, but that is done with blending.