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Tool Talk Discussion Forum

Meyer snow plow NO RESPONSE

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cat236

02-14-2007 16:26:04




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I have a Meyer snowplow with E47 pump that belongs to a friend, while plowing the other night he hit a solid snow pile raising it high enough to slam right angle cylinder into bumper breaking fitting.He did not realize he had done this and ran all fluid out of pump. I went out next day and chained up blade to get home to shop.Repaired fitting and filled system I have spent several hours bleeding air and cannot get "ANY" functions to work. I have inspected all coils removed and cleaned filters, tested for ground and power.Removed and inspected pump and found seal above pump gears to be unseated replaced seal.I also replaced pump to cylinder mounting orings and inspected spring,ball and check valve. Pump is building some pressure my guage is on loan and I wont get back until this weekend.I have been to the diagnonstic websites and parts pages and all the flow charts individual tests are good with the exception of testing pressure. I am at a complete loss. When I crack open hydraulic fittings I have a limited amount of pressure and signs of foaming which is suggestive to me of an air leak.Unit was working fine before this happened, I have no idea how long he tried to get to work with no fluid. Yet no signs of catastrophic failurewere evident.Any help would be greatly appreciated.

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cat 236

02-16-2007 23:53:31




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 Re: Meyer snow plow NO RESPONSE in reply to cat236, 02-14-2007 16:26:04  
Well I thank you all for your comments and suggestions. I have plow up and running ready for the falling snow. Problem was intermittent voltage to A coil as a result of impact. Wire was in solenoid and when I tested for voltage at plug it was OK.I removed it and tested for magnetism and it was OK. I finally noticed though, I did not here the distinctive clicking all the time of the coil opening the valve. As I looked into it more I noticed wire was crushed leaving only a few strands of wire internally connected. When I tested using battery charger, I must have been applying enough amps to make it seem ok.Replaced coil and all is well.I respect all opinions ,yet I have to say this truck has been pushing this Meyer plow for about fifteen years and this is its first breakdown.I asked the guy who runs it, he says it does fine in all snows,but not so great with ice.Not heavy enough. Thanks again and happy plowing,it will all be over soon... I hope.

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Paul in MN

02-16-2007 20:25:27




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 Re: Meyer snow plow NO RESPONSE in reply to cat236, 02-14-2007 16:26:04  
I too am in the snowplowing business (40 years), but do not profess to know everything about the Meyers E47, although I have one in use that is 21 years old. It absolutely has to have the factory spec blue fluid, which has a lot of alcohol content. The Western pump works just fine on ATF (red). Check the fluid color, if it is anything other than crystal clear blue, flush it out. If it is green and milky, it has water in it and that froms ice crystals in the solenoids. IIRC the "A" solenoid is the most common trouble maker with ice crystals. Use a deep 1-1/8" (?) socket to loosen the solenoid. You need to take the electric coil off first by taking off the small nut at the top. You can clean out the solenoid with mineral spirits and then compressed air to blow it clean.

The symptoms you describe can be created by the elect solenoid "dump valve" sticking partially open. Check the Parts break-out drawing, but I think that is the solenoid that is located on the side of the case.

Some of the functions require the electrical activation of 2 solenoids at the same time. Check their diagnostic flow chart very carefully. Have you actually determined that each of the 3 elect coils is creating magnetism? This can be done by holding a screwdriver very close to each solenoid coil as someone else momentarily activates each control switch function.

It is also possible to have bent that turn ram that hit the bumper. The ram rod is a piece of solid steel which usually does not bend, but the cylinder tube bends pinching the rod very tight making the pump go into "relief" mode. Check the outside of both ram tubes with a straight edge every 90 deg. They have to be exactly straight. A 2 way ag cylinder will put up with some bending of the rod, these 1 way cylinders will NOT.

Good Luck!

Paul in MN

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Dale in WV

02-15-2007 08:53:58




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 Re: Meyer snow plow NO RESPONSE in reply to cat236, 02-14-2007 16:26:04  
On the no response, is it the left/right cylinder, or the lift cylinder, or both??
You added fluid when the lift cylinder was extended, right?

Our biggest hassle is from moisture freezing - which effectively disables the whole thing...



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the tractor vet

02-14-2007 20:07:36




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 Re: Meyer snow plow NO RESPONSE in reply to cat236, 02-14-2007 16:26:04  
Well this is from experance talken here as being a comercial snow removal contractor for 19 yrs. First ya have to have the book next ya need the specl. tools then ya need atleast one spare unit ready to run and ya need on hand at all time engough SPARE PARTS TO BUILD ONE FROM THE BOTTOM UP. As they never let ya down till ya need them and always on the big snows . Also from what i have learned is that myers plows are total junk they maybe ok for the 1-4 inch snows but they are wortheless over that . A western is ten time the plow and from what i hear there are others that are good to better then a western. I am now out of it but when i did have that junk Myers that came with the one new truck it was always down and if ya thought that i'll just run it up to the dealer and let them fix it you would grow a beard waiting in line just for them to tell ya to just buy a spare power unit and they would get to mine in a couple weeks as they had so many ahead of me so it was not just me .

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john bowers

02-14-2007 17:50:27




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 Re: Meyer snow plow NO RESPONSE in reply to cat236, 02-14-2007 16:26:04  

http://www.meyerproducts.com/service/parts_service.asp service manual for your unit



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RayP(MI)

02-14-2007 17:48:29




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 Re: Meyer snow plow NO RESPONSE in reply to cat236, 02-14-2007 16:26:04  
Sounds like you have pretty well covered the waterfront - Does the unit have a over-pressure release valve? Did you check that - might be stuck open, or partially so. My pump (another brand) has release valves, but it hasn't worked quick enough to save a couple angling cylinders, leading to blownout cylinders.



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