Hi. What oil is available that will match the spec of TO oil for a 5U Cat D2 ?
Does caterpillar sell one ?
Thank you and wishing everyone a wonderful new year

I would tend to think that it would take 90wt or 80/90 wt gear oil. Most major brands offer it. My personal choice would be Mobil Delvac 80w -90 If your in really cold country you could spend the extra money and use Mobil Delvac 75w - 90 synthetic. Up to you. I'm sure Cat offers a 80wt 90 gear oil and likely has a synthetic as well. Main thing is to get it drained out good and do a good flush with some diesel fuel prior to refilling. Clean is the name of the game!
Best,
Woody

tex trans tdh is perfect for the transmission and hydrualics and it a 75w80 gear oil with cat to-4 approval its specifically for the trans hydrualics and diff of farm tractors.

  Thank you. Is there a non-detergent oil made by caterpillar that is still available for the transmission ?

cat dont make any oils or grease. they are another brand packed for them. the "only use our oil cuase its the best" is marketing crap. the only time you use genuine fluids is its the only product available or for new machines to meet extended warranty requirement. most you can by off the product manufacturer cheaper the only difference is the drum and the label. cat doesnt have much in its lube range that suits these old girls anymore they are more for the 70s and later machines. the older full manual drivelines started phasing out then. todays machines are all some for of hydrostatic drive.

these old girls have very simple requirements. according to a lube engineer at penrite older engines still benefit from modern oil technology even though its superior to what they need.
just dont use zinc fortified oils in the trans and gear housings as they hove bronze components which dont like the zinc additives.

i personally prefer penrite but currently we're using caltex as that was available at the time for a good price and is a quality product. the most important thing is it meets the requirements and its kept at the right level and changed regularly.

trainzkid88 wrote:

just dont use zinc fortified oils in the trans and gear housings as they hove bronze components which dont like the zinc additives.

 

What components are brass in the trans and gear housings? Bearing cages?
ExxonMobil make oil for Cat.
Your comment about the oils from the manufacturer is mostly correct but there has been instances where the aftermarket oils are not the same as the genuine article and a very noticeable difference in equipment performance and lifespan have occurred.
Cat still offers oils that are suitable for older machines. Don't know where your info comes from.
I personally use Castrol oils.

Many ideas have come and gone since the old Cat's where new including what is the correct oil. Some where in the 1970's Cat came up with the idea of one oil for everything on a tracked tractor with gear drive. After the fact someone found service bulletin to show me this was recommended even for the old models. But it did not last long, until the thicker gear oils where back in favor. So as long as it has oil and is not dry for the modest use most of us give our older machines anything is should keep it going.

  Thanks and sharing some more pictures of the machine.

i was told that by a lube specialist from caltex that there where bronze components in the driveline that didnt like the zinc additives used in some oils. brass is copper and zinc. bronze is copper and tin often fortified with phosphorous or aluminium hence phosphor bronze. ally bronze can be so tough you cant machine it and it has to be forged or cast. alot of ship propellors are ally bronze for its toughness and wear resistance. zinc is galvanically different to tin and thus bronze so it can react.

yes cat did originally develop thier own oils with standard oil that where the DELO product line comes from.

what changes everything is what climate your working in. in a hot climate like australia you could happily use a 20w50 oil instead of 15w40 as our temps are hotter all year than say west virginia. take a look at the sae recommendation chart for your car to get a idea how operating environment affects viscosity choice. sae 30 was the choice decades ago because thats what they had and could do with technology of the time. the owners book actually describes thinning oil with kerosene to make it usable in cold temps.
the fancy polymer compounds that change with temp they use today didnt exist.

another member described using a synthetic racing light gear lube in the starting clutch on his grader as the usual engine oil gelled too much in the freezing temps he works his machine mind you he's in the middle of nowhere canada and he needs the grader to keep his driveway clear in winter.