Levelling Jacks Leaking
I have leaking levelling jacks on the front of my RV. I was told by Camping World technician that they need new seals. He said he called Kwikee and they no longer make these jacks and don't have the s...
Forum Discussion
dougrainer wrote:-Gramps- wrote:
According to the Power Gear tech I talked to, if you pump enough grease into the fitting that you see it come out the seal, you have a blown seal, or you just blew it out yourself. Best to use only two or three pumps of the gun, not till you see grease coming out.
I have done more than 50 Powergear lubes in the past 20 years. I will bet if you talk to that Power gear tech, that is 50 more than he has done. And at no time when the grease oozed out has it ever caused a leak or operational problem. Doug
Doug is absolutely correct. The reason that it's oozing out when greased is because it's coming out from behind the Wiper seal (which is not the actual high pressure Rod Seal.) The Wiper seal lip is facing outward - away from the pressure. Therefore, the grease is merely pushing the lips open and therefore oozing out.
The cross-sections of Power Gear Rod Glands that I've seen have a grease fitting that enters in between the Wiper and the Rod Seal. For what exact reason they have a grease fitting there, I'm not quite sure exactly?
The seal that you actually "see" where the rod moves in and out of the cylinder is merely a "Rod Wiper" and it does what it's name implies - Wipes debris from the rod as it retracts into the cylinder. The wiper does not "seal" any hydraulic fluid under pressure. The actual high pressure sealing is done by another seal that sits behind the wiper in it's own groove. That seal is typically a "U-Cup Seal" or sometimes known as a "U-Seal". Although, there are many types and styles of Rod Seals, these are most common in these types of applications. It is THAT Rod Seal that does the actual High Pressure sealing.
