The governor locking control on the side of the diesel engine won't  stay in position. When I  throttle up it just goes back to idol. Has anyone had this problem and fixed it. Some input would
be appreciated.  Thank you. 
I also need to know what oil to use in the transmission and final drives on my 5u13773 D2
This dozer is complete except for the parking break parts. Someone removed them before I got it. I would really like to purchase these parts so I can restore this very nice dozer.

the pawls are worn in the throttle control--sometimes a though cleaning of them will get them to hold---use sae 90 gl1 gear oil in the gear boxes

I had the this problem on my D4 (which I think has the same gov control arrangement). In addition to what dpendzic says, I pulled the 'ring' and 'pawls' to pieces and fairly certain I've was able to reverse how the pawls mate with the ring and also carefully filed any mating teeth/grooves. That along with removing some of the slack from the rest of the throttle linkages, stopped the governor from returning to idle.



Paul.

the trans can use engine oil. but my preference3 is caltex textrans tdh it a universal tractor trans oil. it also does the hydrualics. for the final drive use caltex torque fluid 434 or 454 depending on operating environment temp. all of these have cat to-4 approval.

Before the 1960's all the crawlers used a heavy gear oil in the transmissions, 90 W or heavier. I believe it was mid 60's Cat got on board with the convivence of one oil in everything. But not many years they were back to different oils for engine, transmission, and hydraulics.

The lighter oils may protect the gears well enough in a old tractor like this, but your just asking it to leak it out at a faster rate.

well tdh is a 75w 80 gear oil and is the equivalent of a iso68 hydrualic oil. torque fluid 454 is a sae 50 gear lube it has now changed name and is called torqueforce 50 and 434 is a sae 30 which is now called torqueforce 30 yes a slightly heavier oil will not leak as much.

but cat requires non friction modified oils in thier specifications. oil is cheaper than parts.

Well I am not familiar with your caltex 434, I just went off the "universal tractor transmission oil". Which to most in North America is the term used for the oil in wheel tractor universal hydraulic/transmission oil, generally speaking everything but the engine. Which is a very thin oil about like 10w hydraulic oil.

some thing to remember sae 30 engine oil is about the same thickness as sae 75w80 gear lube and the same thickness as iso68 hydrualic oil.

what really makes the difference in oils is the base oil its made from, and what additives are mixed into it.
they developed different rating systems so dickheads would get em mixed up. you dont want extreme pressure additives such as sulphur in a engine(thats why gear lube stinks) as the heat and condensation would create acids.

on the same token gears need extreme pressure additives.