Thanks, Chance123, but no hydrostat pumps, just straight transaxle, K-62A. I am going to change the oil, called tuff torq for info, they say use 5w-50 synthetic
It should be quite easy to change the oil on the K62, follow the tufftorq drain/fill/purge procedure & I'm sure you will have no drama.
It's good maintenance practice to change hydro oil & in the so called "sealed unit" of my JD LT155's one of which has now done just over 1100hrs ( the tranny performs as new) every 100hrs I replace the oil with premium synthetic product (this TuffTorq tranny is supposedly is sealed for life but the way I see it : oil breaks down, & all hydrostatics hate heat & degraded/dirty oil so it's cheap insurance & relatively easy to do even on this so called sealed unit) & ditto for a sealed Peerless tranny I have in a homebuilt GT - diminished performance in a hydro due to oil breakdown may be revived if it's not too late.
Generally, when changing Hydro oil:-
- have the transmission warm so the oil is warm & empty's easier
- clean the unit thoroughly with compressed air or wash in water/dry prior to removing any filler plugs/caps, with hydro's any dirt ingress can quickly kill the unit
- the oil level is critical, so measure/mark & replace exactly how much you remove (there may be a fill level marked just inside the filler housing but it's not always there & if available follow the manufacturers recommendation exact volume.
- there may be a small filter mesh screen & possbly a small spring just inside the filler housing which can be cleaned too (they just drop out).
- take time to let the oil drain slowly to empty as much as possible
- also take time to fill with oil to allow the oil to distribute evenly in transmision & fill slowly to minimise any air bubbles/air locks forming in the oil, & also occassionally whilst filling rotate the axles slowly by hand to distribute the oil evenly in the hydro unit
- purge the air (follow the Tuff Torq procedure), check level & top up if required
- depending on the filler plug/cap fitment, once you replace firmly it may be prudent to use a small bead of silcon externally around plug/cap to exluded all possibility of dust ingress.
For hydro fluid on TuffTorq's I use Mobil 1 5w50 Engine oil.
Good luck & let us know how you get on
