After searching some recent threads and printing a Lubrication chart which tells me to put sae 30 in the final drives of my little cd5 I've drained them to find them filled with gear oil. What should I do? fill as recommended or replace the 90wt? thanks for chiming in jake
Well I managed to get ahold of a friend of mine who is a roadbuilderexcavatorloggertype and he said that while it seems that most manufacturers recommend using motor oil that its common practice to use 90wt that's hopped up with a jug of powerpunch in the finals. so that's what I did.
Call lube Tek and ask them 1 800 lube tek
Nige claims 90wt will cause the duo cone seals to fail prematurely. I use TO-4 spec 50wt.
Thanks to both of you. I'm thinking that the water diluted what was in there down to about 50w. the seals should be fine I'll use it next time.
The EP additives in gear oils have been proven to attack the silicone rubber used in most Duo-Cone seal toric rings. Don't get confused with viscosities between TO-4 and EP gear oils. TO-4 powertrain oils use "motor oil" viscosity classifications, EP oils use "gear oil" ditto. An EP 80/90 oil is equivalent in viscosity to a 20-30 weight "motor oil" depending on temperature. An EP 90/140 oil is equivalent in viscosity to a 50-60 weight "motor oil" depending on temperature.