Posted by Don McCullough on January 06, 2010 at 17:09:14 from (71.114.185.149):
Would like some opinions--facts even better--about the following:
Tractor: 5020 John Deere yr.1967
Correct tire pressure for 30.5x32 rear tires. 14 lbs?? Think that"s where they are now and I"m guessing a little less would be best.
Optimum/adequate oil pressure. Was told good to see 40 psi at full throttle but notice the shop manual says 25-35 psi at 1900 rpm. Full throttle is 2200 rpm. Until oil got warmed-up, really well, could not make it to 40 psi at 2200 rpm today. Temparature outside about 25 degrees. Have new gauge and at certain reading levels the dial did quite a bit of "jiggling." Also have new oil pressure "idiot light" hooked-up and working proper.
Best oil to use in this tractor? Previous owner was using 15W-40 Shell so I"ve continued with the same. Some say 30W best for lubricating older tractors with greater parts tolerances.
Best fuel? I"ve used only #2 Diesel but see in operaters manual for typical weather temperatures in my area that #1 might be best year round. I know about all farmers here use #2. Would seem #1 would burn cleaner and maybe even up the power a little.
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