CJ Plant are considered to be one of the UK’s leading Hydraulic Repair Specialists. We specialise in the repair, rebuilding and maintenance of Hydraulic Pumps, Hydraulic Motors, Final Drives, Centre Swivel Joints, Swing Reduction Units, Control Valve Blocks etc, fitted to all makes of machinery/OEM’s; including, JCB, Komatsu, Volvo, Hitachi, Liebherr, Case, Cat, Kobelco, Doosan, Linde etc.
We are a highly dedicated, skilled and professional team, working from our custom-built workshop, with repair, testing and diagnostic facilities. Our engineers, are highly skilled, and their focus is on quality, ensuring that all units are repaired back to OEM standards. All our work comes with a 12-month written warranty.
On receipt of a unit, it is stripped and inspected free of charge, we then provide you with our report and our quote to repair. We have an excellent network of parts suppliers, which helps to us to keep machine downtime to a minimum and also lets us offer cost effective repairs.
How do these pumps yield two separate outputs from one rotating group? Is the key in the two concentric rings of holes in the lens plate leading to different ports? If that's the case I don't understand how they don't communicate, or is there a flow divider? I see there are an even number of pistons so is it really two rotating groups mingled together?
The technician makes it look very easy and I'm sure that there was a lot more inspection and measuring work that was not recorded.Lovely video ,well done.
Why do these pumps have two outputs ? Are they independent circuits to allow equal flow to both track motors ? If you have pressure at P2 but nothing at P1 ports would that be a damaged port plate on one side ?
Hey did you find out anymore info on this, I actually have one of these pumps with 2 ports and 1 does have more power than the other. Appreciate any help. Thanks
@@calvinh9453 it is possible to get a damaged port plate affecting only one port but thats unusual. You would check relief valve settings before the pump , then swap the hoses at the pump and see if the problem reverses or stays the same.. I repaired a machine recently with the track on one side not walking at full speed , the previous owner replaced a valve body and track motor costing thousands but the problem was still there, turned out to be just a track motor control lever had a worn rocker on the pilot spool , the spool wasnt compressing fully but once the rocker arm was repaired the travel speeds were perfect , that fix cost around $ 200 compared to the previous owner wasting $ 14,000 on incorrect diagnostics.
To insert the rotating groups you need to heat the the housing 230F and assemble the the drive shaft and driven shaft with all bearings retaining plate barrel and pistons center pin is threaded use an auxiliary screw and washer hold the rotating group together with the cup spring and shim stack and barrel to be assembled before hand. Note the timing marks on the drive and driven shaft during installation.
