Self serving since I am the Tripak mfg rep, but our Deep Blue chain conditioner is great for open splines on PTOs and such. Our grease will keep internal units coated for an extended time and nothing will stick to the splines. Check Fastenal or your local farm store to see if they have it.I'm sure this topic has come up, but... maybe I was unlucky with the search terms.
The mid pto's and FWD spline shafts don't move around much, don't have grease fittings, and don't there fore, get regular lubrication service.
What the best lube? Moly fortified grease has been my go to, but I've recently pulled down the front axle drive on one of my tractors, and the spline couplings look mighty dry! (still in good shape )
Mean while, the engine mounted drive on my neighbor's Kabota B7100 stripped out completely, and that's a tough spline to match (availability)
What's in your grease gun?
I do on mine. It's as simple as sliding the cover backwards for the front one and remove the cover plate for the other one, hammer the roll pin out and slide the coupler backwards, then apply grease, slide it back and forth a couple times and put everything back together.On a spline that doesn't move much, like the FWD one, how do you get grease or lube into it in the first place? You're not disassembling it to lube it, are you? Just squirting what you can in at the end of the sleeve?
Which is exactly what Kubota spells out in their shop manual for the front segmented drive shaft for the FWA.I do on mine. It's as simple as sliding the cover backwards for the front one and remove the cover plate for the other one, hammer the roll pin out and slide the coupler backwards, then apply grease, slide it back and forth a couple times and put everything back together.
I only do this every 200 or 300 hours of use. Depends on the mood during maintenance.