I have a TLB and sometimes it goes many months without use. I used to wipe some grease on the cylinder rods if I knew it would be in storage for a while. Today I didn’t have any tube grease that I usually use so I sprayed on some white lithium grease. It occurred to me after the fact that it might damage the seals but I really don’t know much about it.
Is it generally safe to spray the exposed cylinder with white lithium grease?
As an equipment owner for over 50 years (18 different backhoes, tree spades, excavators, compactors, etc - all with hydraulic cylinders), I never need any oil on the cylinders which are used regularly.
BUT - on the equipment that may sit outside for months between uses, wiping hydraulic oil on the cylinder shafts prevents the tiny pits of rust from forming.
I had to learn this lesson the hard way back about 50 years ago when I had to use 600 grit wet-or-dry sandpaper to sand down hundreds of tiny rust pits that had already destroyed the cylinder seals and caused leaking on my old Ford Backhoe which had not been used for about 9 months.
I didn't inspect the cylinder rods before using the backhoe and it had hundreds of tiny rust spots that destroyed the 2 largest cylinder seals (Dipper and boom cylinder seals) Then I had to to replace several other cylinder seals on other equipment about the same time.
It was an expensive learning experience. If I have equipment that I know will be stored outside for a while - or notice I have something that has set for a few months without use, I will either fire it up and cycle every cylinder several times to apply the protective hydraulic oil on the cylinders (THE hydraulic oil has anti rust additives and is why cylinder rods don't rust when used regularly) - or ill grab my sealed container with hydraulic oil and a rag soaked in the oil and wipe all exposed cylinder rods.
Chrome is a coating over steel and it does rust - just ask any old car/truck collector about the need to wax those shiny chrome bumpers (I have many old cars and trucks that I don't have inside storage for).
These chrome bumpers will get tiny rust pits and then grow larger over time.
For the seals facing the sun, I spray lithium grease on the seal, as a sunscreen. I've rarely had to replace any hydraulic seals or cylinders since I started oiling the ones that are not used regularly. I've been doing this for at least 50 years now and I discovered using the spray lithium grease on the seals exposed to the sun about 40 years ago. Just a quick, light coating of spray lithium protects the seal and the critical area of the shaft that can sometimes rust due to trapped water at the seal in certain orientations.
I have a TLB and sometimes it goes many months without use. I used to wipe some grease on the cylinder rods if I knew it would be in storage for a while. Today I didn’t have any tube grease that I usually use so I sprayed on some white lithium grease. It occurred to me after the fact that it might damage the seals but I really don’t know much about it.
Is it generally safe to spray the exposed cylinder with white lithium grease?