I haven't had great luck with any Harbor freight product that has hydraulics. If you have a problem within 90 days they exchange or if you buy the extended warranty they stand behind the product.

Out of warranty and need a part... good luck. If you're willing to take the time one could probably find o-rings and seals that would work.

If the lift you're looking at uses a conventional bottle jack then replacements are EZ to get but if it is proprietary you're screwed.

I get by just fine using a pair of Rhino ramps and a floor jack when necessary. Ramps cost less and have no moving parts.

I do not use ramps or lifts, but a simple floor jack, the type with wheels. When I grease the front wheels, I place the jack in the middle of the front end lift until the wheels are off of the ground, so it is easy to turn the front wheel to get to the zerks.

Same procedure when taking off the mower deck. Remove the pins, lift the front so every thing clears and the deck easily comes out.

If I need to get under the tractor, which has only happened once in the ten years I have had the tractor, I use the jack and blocks for safety.

The beauty of the floor jack is It is not in the way when you need to get under the tractor, and it is easy to store.

I use my HF heavy duty hyd lift table w/ a chain hook bolted to the end of the table deck and using a short chain to attach to front or rear of the rider. If I want both ends off the floor I lift the rear and place milk crates under the rear tires and then lift the front. Besides that it has many other uses like lifting a push mower up to the same height as the welding table w/ it about 18" away from said table. Turn the mower 90* and put front wheels on welding table to change oil or remove the blade.
Mike