my right hand stick control (pilot control valve) on my 135 has been leaking for a while now and starting to create issues. I went to order the new top end seals and was told i need to replace the pistons at the same time. Is this necessary or is this just a gimmick by the dealer to get more money? Their should be no reason the pistons need changing on a machine with low hours. So now a repair job that was only going to cost about $20 in new seals has jumped up significantly.
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Pilot control valve
- Thread starter Zrock
- Start date
Bls repair
Senior Member
May have upgraded spools and seals ,so you need to replace both.
the issue i have is their partsman is new coming from a truck dealer and is unfamiliar with JD or heavy equipment. So was he trying to up sell me or was their a upgrade where both parts are needed.. Searching online you can buy the seal kits and non of them mention having to replace the pistons.
Most of the time the manufacturers have upgraded parts to improve reliability and performance. The computer system automatically updates those parts with supersessions and the dealer has nothing to do with it. If your getting the parts from the manufacturer, they have done it that way for a reason.
John C.
Senior Member
Manufacturers from my experience will generally sell out old stock before letting people know there are up dates unless it has something to do with safety. I've resealed plenty of quad control valves and never had to install new pistons. The general rule for repairing or replacing hard parts in a hydraulic system has to do with touch. If you can feel a scratch or worn area it needs to be attended to. In this case, you could have asked to see the written notice showing the reason for the update.