Originally Posted By: Bassnjunky
The confusion still lies with the data plate information and the referenced lube in the manual, see above. The data plate references 90W - for tranny & running gears - equivalent Vg @ 40C is 150-220 cTs, not 55vg as Mobilith 424 - stated on website. It may be utilized for the hydraulics but it is the same reservoir for Hydraulics and "running gears".
Bass, I can see where you are coming from. I perfectly understand your concern , which no doubt is really valid ........ from the perspective of wear protection for mechanical components on oil selection.
On the plate indicates :-
a)the tranny and gear trains require ISO 220 or 150 gear oils;
b)the hydraulics spec'ed at ISO 46.
It appears to me the mobilube 424 is a superior product . It has far better performance spec than ISO 46, however it's operating viscosity would be far too inadequate against ISO 220 or 150 gear oils.Besides it lacks EP additives for gears.Hence I would rule out this UTF mobilube for the common sump in your context.
IMO, a gear oil of proper grade in the common sump would provide an operating viscosity that offers superior wear protection to the tranny , gear trains AND the hydraulic components.
However do bear in mind that the ISO 220 gear oil's operating viscosity may be high enough, during morning cold operation, as to make the hydraulic actuators lethargic in operation.
In the balance of things, I would recommend you to consider a thinnish ISO 150 (AGMA 4EP) or a thickish ISO 100 (AGMA 3EP) gears to strike a balance in the common sump.
JMO.
