Hydraulic pump weak

[lakespirit]

An AMAZING coincidence since my old man died about 30 years ago. What's the site? I'd love to check that one out.

 

[Creekman]

You may need to read my post again , i said 15w40 is for our HOT days in hydraulics not for the cold , as 10w loses it's viscosity when under extreme heat . And as ive posted before in other threads , 15w40 should only be used in warm climates as it is a little thick in extreme cold . But on worn machinery it can help to get a little more work out of it before it is rebuilt or scrapped . Now i said we use it for GEARBOX'S in cold weather as im sure your trucking guys also do because 90 becomes too thick and slows the gears in the box too quickly making gearshifts troublesome .

Your post said that you use 15w40 in EVERYTHING including the hydraulics because of problems on COLD mornings and you said that 15w40 should be left in the hydraulics year round. Once again I ask you: how cold does it get in Australia that you need to use 15w40 in the hydraulics? Maybe you should read your own posts before replying.

 

[Creekman]

An AMAZING coincidence since my old man died about 30 years ago. What's the site? I'd love to check that one out.

I'll try to find it again.

 

[Creekman]

An AMAZING coincidence since my old man died about 30 years ago. What's the site? I'd love to check that one out.

Oops, my bad. The post was by bigcountry1009 on TractorForum.com.
Please accept my apologies.

 

[Soundguy]

Anyone have a spec sheet showing it is ok to use crankcase oil in an ep application? I'd get that in writing before i attempted it..

soundguy

 

[Eagleview]

Leave the 15-40 in it forever , there is nothing wrong with using it (and i did say if your sure it is worn out and just want to give it a little pep). We in Australia use it in everything , truck and tractor transmissions , engines , hydraulics and all , some manufacturers recomend it , ive never heard of a complaint . We would not be able to change gears with a 90 weight in our gearboxes on cold mornings so we all use 15-40 and on hot days 10w hydraulic oil losses it's viscosity so we use it in the hydraulics , Caterpillar dozers use it from one end to the other .

Post reads fine to me .

 

[Eagleview]

http://www.lubadmin.com/upload/produit/FichePDF/lang_29/124.pdf Soundguy//. Just one site i found quickly . Ive just swapped the 10w hydraulic oil out of my new 23 tonne excavator and filled it with 15w40 the difference is amazing .

 

[Soundguy]

Api rating for the engine is a bit dated.. but it is an example.

I have a feeling plain of fthe shelf 15w40 does not fit the bill, and this example you posted is a VERY specilized oil.

Just making the blanket statement to 'go change your UTF oil to 15w40 oil kinda falls short... as you would need that very special formulated oil that was rated to handle both crankcase and gear lube, and hyd applications...

soundguy

 

[lakespirit]

OK, it's time for a former technical lubricant guy to weigh in on this. It's been a bit more than 10 years, but unless additive packages have improved dramatically, here' my take.

1. 15w/40 is used in many hydraulic applications, including multi-million dollar Caterpillar loaders, haul-trucks and the like.
2. Transmissions in large equipment have also been using 15w/40 for many years.
3. 80w/90 gear oil, like Shell's Spirax are the best bet for differentials. I never recommended 15w/40 in these applications.
4. If you have lotsa money to spare, in cold climates, ATF or aircraft hydraulic fluids are excellent for hydraulics.

 

[lakespirit]

Oops, my bad. The post was by bigcountry1009 on TractorForum.com.
Please accept my apologies.

No bigge!