oil for D69U transmission

kinda light for the trans but ok for the oil clutch. I wouldn't go less than 50W for the transmission.

kinda light for the trans but ok for the oil clutch. I wouldn't go less than 50W for the transmission.

This is good advice. you should look in to the history and effects of Caterpillar oil recommendations.

kinda light for the trans but ok for the oil clutch. I wouldn't go less than 50W for the transmission.

This is good advice. you should look in to the history and effects of Caterpillar oil recommendations.

I don't know that it's all in one place, but in a nutshell, at some point in the late 60's or early 70's, Caterpillar recommended or at least allowed the use of 30 wt oil in all compartments of their equipment. I think the idea was to simplify maintenance and reduce cost of operation. I'm not sure how successful that ended up being, but I guess it did simplify daily maintenance at least.

Since that time, there have been so many improvements in each special purpose fluid/lubricant/oil that the benefits of using the best one for each use cannot be ignored. I use diesel rated motor oil for the engine, a universal/hytran/TO fluid for oil clutches, powershift transmissions and hydraulic systems and a gear lube for manual transmissions, final drives and other gear boxes. Viscosity of each fluid depends mostly on expected ambient temps the machine will be operated in.

[quote="ccjersey"]I don't know that it's all in one place, but in a nutshell, at some point in the late 60's or early 70's, Caterpillar recommended or at least allowed the use of 30 wt oil in all compartments of their equipment. I think the idea was to simplify maintenance and reduce cost of operation. I'm not sure how successful that ended up being, but I guess it did simplify daily maintenance at least.

Since that time, there have been so many improvements in each special purpose fluid/lubricant/oil that the benefits of using the best one for each use cannot be ignored. I use diesel rated motor oil for the engine, a universal/hytran/TO fluid for oil clutches, powershift transmissions and hydraulic systems and a gear lube for manual transmissions, final drives and other gear boxes. Viscosity of each fluid depends mostly on expected ambient temps the machine will be operated in.[/quote]

Thanks for your input. My free supply of engine synthetic oil, 10-30 is probably no good for transmission and clutch, but ok for engine. So, when I go to Tractor Supply, what am I looking for in Transmission oil, like what is the equivalent of SAE 30 mineral oil or the MIl-L2104A oils? I'm sure Mil-L-2104 is outdated... Also, the final gears I plan to use 80-90, GL5.
Thanks, flyingfred

[quote="ccjersey"]I don't know that it's all in one place, but in a nutshell, at some point in the late 60's or early 70's, Caterpillar recommended or at least allowed the use of 30 wt oil in all compartments of their equipment. I think the idea was to simplify maintenance and reduce cost of operation. I'm not sure how successful that ended up being, but I guess it did simplify daily maintenance at least.

Since that time, there have been so many improvements in each special purpose fluid/lubricant/oil that the benefits of using the best one for each use cannot be ignored. I use diesel rated motor oil for the engine, a universal/hytran/TO fluid for oil clutches, powershift transmissions and hydraulic systems and a gear lube for manual transmissions, final drives and other gear boxes. Viscosity of each fluid depends mostly on expected ambient temps the machine will be operated in.[/quote]

Thanks for your input. My free supply of engine synthetic oil, 10-30 is probably no good for transmission and clutch, but ok for engine. So, when I go to Tractor Supply, what am I looking for in Transmission oil, like what is the equivalent of SAE 30 mineral oil or the MIl-L2104A oils? I'm sure Mil-L-2104 is outdated... Also, the final gears I plan to use 80-90, GL5.
Thanks, flyingfred