25K Winch on Power Wagon OT

mate shouldnt matter just need to reverse either field or the armature but not both if you reverse both the motor will go in the same direction
I would be concerned about the starter motor getting hot ? they are only desgined to work for 30 seconds max at a time
normally if a gear box is getting real hot you have a crook bearing does it take long to get hot ?

Paul

Hey Mike.

Something you might try before you go to a bunch of effort. Try about a mix of 20% to 25% motor honey (STP or Lucas). The old time Cat mechanic I use to hire told me about this trick for the final drives on my D6C. It worked. He also used to put it in the SQHD's behind a Cat 1693. That dropped the temp in the differentials by 75+ degrees climbing Pacheco Pass. It might work for you.

Casey

I would definitely try putting some stp or lucas oil additive in it. we have had success with that in the past on our farm trucks. it does cool the gearboxes and diffs down, at the dealer we used to use stp oil additive in angle drive gearboxes and final drives, prevented the oil from "burning" and turning black.

Definitely keep the winch as is; that's a great pto setup. Hot tranny = bad bearings, which means they are going to start to disintegrate eventually and destroy the gears. The trannys in those trucks are easy to remove, repair and replace, so I would rebuild it. While it's out, you can check the clutch as well. I had a truck with a good trans and brand new pto, and I knew a bearing was going bad, but I ignored for too long. The bearing grenaded and destroyed both trans and pto.

We logged about 8K miles on the Power Wagon this summer. If I'm towing the travel trailer (60 mph foot to the floor) with the 1950's Brownie in direct it only runs about 175 on the temp. If we drop the trailer and run the freeway 70 mph with the Brownie in OD for an hour it starts getting hot. At 280 I down shift to direct and it slowly cools down. I realize running in OD robs power and creates heat.

The pto always has two gears that are spinning. The main gear that rides on the lower shaft and a little idler gear. The winch is not engaged until the 3rd gear is activated. I was thinking since I never really use the winch (still want it to work) maybe these two additional spinning gears might be pushing the temps up? Maybe not since it doesn't get hot in direct?

I have the Brownie out and apart now trying to cure some oil leaks. If you all stand firm on oil additives I'll give it a try.

dunno Mike the more you type the more it sounds like a crook bearing to me some type of super lube might help the temp but it wont help a crook bearing just my thoughts

Paul

the heat is coming from the transfer of power and the "friction" of running the gears that are under load. the oil creates a thin layer of lubricity to reduce the friction and prevent the metal on metal contact but heat is still generated as you are trying to compress an incompressible fluid. the two gears that drive the pto winch are along for the ride and are not adding significantly to the heating of the gearbox. other than adding a cooler to cool the oil, your only option is to reduce the friction and therefore reduce the heat STP oil additive, or there is a lucas oil one as well, definitely will help reduce the friction and the heat generated in the gearbox.