mph2 growling and vibrating bad!greenspun.com : LUSENET : Elevator Problem Discussion : One Thread
The car growls and vibrates in the up direction as the pump runs. The down is fine At the moment it growls any time the car runs up and even when bypassing. Today we repaired the connection between the valve and the pump it was spraying oil out. I'm not sure if the growling is from the air we got in the system or something else like a bad pump. Who knows the BEST way to bleed the air out? We ran the heck out of the elevator to try and get the air out but it still makes noise. Who knows the best way to troubleshoot if it's air, a bad pump, or a bad valve, a bad muffler or a bad motor. I hate to just take it all apart and have all the parts tested but if that's what it takes!!!! Thanks for any help you can give me.
-- joe (email@example.com), December 17, 2004
first, the muffler the last schindler hydro was made with air mufler you must put air in the muffler to suppres noise inside the car your muffler has a air valve ???
-- !@#$% (firstname.lastname@example.org), December 17, 2004.
Thanks we checked that. It's not the kind that pumps with air. At least I couldn't find a spot to put any air in it. It looks just like an eeco muffler. And thanks for answering!
-- joe (email@example.com), December 17, 2004.
I don't think there is air in the system, unless you have bouncing on the way down. as you describe, on the way down is fine, means no air. the only way is to bleed the system is from the top point on the ram and this you may have done it already. air will not stay in the system and finally it heads toward the piston keep on bleeding from time to time.
you have to start check from oil quality oil vescosity, also check and replace up pilot valve.
can you explain more about controller and valve types.
-- (firstname.lastname@example.org), December 18, 2004.
What about greasing the ram, could be dry as on the up cylinder may be needing greased big time, hope this helps, good luck.
-- kvs (email@example.com), December 18, 2004.
Never heard of greasing a ram. The sound in the machine room is almost like the motor is single phasing but the car runs fine...except the bad noise. You think the up pilot could cause such a loud noise? It's an ecco valve and shouldn't be much trouble to open. It's a schindler MPH2 5 stop hydro with a long pipe run to the cylinder about 50 feet and the machine room is below the cylinder head. Thanks for everyone that answered so far!
-- joe (firstname.lastname@example.org), December 18, 2004.
Is there a screen on the Pump intake ? Once I saw a page from a set of prints fall in the tank and wrap around the inlet. It caused something like the problem you describe.
If your pump is an IMO, there isn't much that can go wrong, and if it's a wet unit, bearings shouldn't be the problem.
It's been a while since I've worked on an EECO valves, but I imagine you've got some screens in there somewhere. Clean the screens.
-- Will (email@example.com), December 18, 2004.
Yes, there is a product called " Jack's Green Slime " that you can use to grease a jack.
I've only used it as an aid in jack seal replacements, but the manufacturer has what looks like a grease pot that you attach to the head to lubricate the seals.
-- Will (firstname.lastname@example.org), December 18, 2004.
I had a case where one contact of the UP contactor was a little high resistance, causing the motor to growl. Might be worth checking if you haven't already.
-- me (email@example.com), December 19, 2004.
There is a product by Case (backhoes,buldozers etc.) that works great if you have a tight packing that stops the vibration from a to tight packing.Put 1/4 q on cyclender and rest in tank .
Was it making the noise before you changed out the hose or just afterwards?
-- Richard (firstname.lastname@example.org), December 19, 2004.
1st, thanks everyone for answering and giving me ideas. The growling got a ton worse after we changed the fitting on the pump that was leaking. That's when we put a ton of air in the system. I left the car at the top floor Friday and I'm going to see if a bunch of air bleeds out Monday from the cylinder. If that doesn't fix it I'm going to check the screens in the valve and drain the tank and check the pump inlet. I don't think it's a tight packing because this car has been running with the same packing for years with no problems so I would think the next step would be to remove the valve and muffler and take them to EECO to have tested unless anyone has a better suggestion. Again thanks for all the help, you guys are great.
-- joe (email@example.com), December 19, 2004.
Will is the man on the this one! A rag was wrapped around the inlet screen causing all the noise. Now who! put that rag in there....The million dollar question. Thanks again for everyone's help!
-- joe (firstname.lastname@example.org), December 20, 2004.
Joe,Had the they same problem not to long ago on a hydro. Turns out the rubber inside the muffler had dissolved and was blocking the inlet screen. Crazy. Glad you found the problem
-- macky (email@example.com), December 28, 2004.