Meyer Standard Operating System, NEW Meyer SOS Plow - Page 2
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Added 11-8-17

Meyer Standard Operating System Information - Page 2

I have now installed the plow I uncrated on the previous page. In addition ,there have been some updates from Meyer on this via Service Bulletins which we will get to later on this page.

Let's look at the E-73 unit. To remove the Lift Arm so the pump cover can be removed for access, Meyer installs a Hairpin Cotter. When I put the sling around the Lift Arm to lift the plow out of the crate like I always do, as soon as I went up with the forklift, the Hairpin shot out somewhere in the warehouse, I heard it hitting cardboard. So I drilled the hole out to 3/16" and installed a reliable Lynch Pin.



Here is a look at the "unsealed" connections at the B and C Coils which are located on the bottom of the E-73 unit. Keep them greased, because corrosion is NOT covered under warranty...



Here is the A Coil, with the same spade connections located on the top of the E-73 unit.



Another look at the B and C Coils on the bottom of the unit.



Another little problem I found is that the Crankstand handle hits the Lift Frame making it impossible to crank unless you push up on the Lift Frame a little. I am sure this will be corrected in the near future. The post on the A frame just needs to be moved forward a little.



Another view of the E-73 with the cover removed showing component locations. Notice where the drain plug is? The entire unit has to be REMOVED to drain the fluid!! I added a Fill Line because Meyer says the unit should be about 2/3 full. There is no Fill Line on the tank. The units ship about 1/2 full.



Another view of the Motor end of the E-73 unit showing component locations. IF your Motor Solenoid is on the bottom, get to the Meyer Dealer that sold you the plow and have them flip the motor, because it is full of water RIGHT NOW. Original units shipped with the Motor upside down, so the drain hole is on top letting water in, and no way for it to get out. It will be a Warranty repair at no expense to you.



Another view of the Motor end of the E-73 unit showing more component locations.



Now we move on to the plow installed on this 2002 Chevrolet 1500. Naturally the suspension has A LOT of wear and tear on it already at 15 years old. The plow is a Lot Pro LD. It is what replaced the old familiar ST-7.5 back in 2008. Now GM 1500 trucks are notorious for their low ride height. So naturally, the plow will be lower on a GM 1500, but the truth is, most 1/2 ton trucks made after 2007 have a low ride height. GM has had a low ride height since 1988 so nothing has changed with them.... Many new trucks need to have a leveling kit installed, beause they all sit low in the front, it has something to do with aerodynamics and mpg, GM trucks especially. From this angle, much of it looks the same other than the lights are closer together and the pump cover is different.



Now you can see some of the differences in the A frame.



I am not exactly sure why, but even with the mount being low on this GM 1500, the plow maintains contact with the ground all the way across the cutting edge. the mount is about 3" low on the truck.



That said, the cutting edge of the plow is almost 24" off the ground when the plow is fully raised. Update 12-2017, the customer already had a major problem but of course has "no idea" how it happened. The plow was not fully raised, and apparently he was plowing and stacking snow, and the Moldboard rode up the pile, but the Lift Arm was down, and it put a HUGE dent in the back of the Moldboard! So unlike I have bee saying for 30 years, "let the plow ride up the pile on its own, don't lift as you come into the pile" well now you have to...



12-2017 - The dent may be hard to see, in addition to the dent, the Lift Stop Brackets were bent, the A Frame came up and hit the 90° Elbow on the bottom of the Lift Ram, bent it and cracked it, and it even dinged the Lift Ram. Something better needs to be done with the stops!



Dent.



THIS I have a feeling is going to be a problem on this truck. The low point of the A Frame in the back with the plow fully raised is only 4-3/4" off the ground. I know Meyer marketing materials say "up to 9" of ground clearance" but that remains to be seen. The EZ Plus Clevis on the truck, the bottom notch is supposed to be 11-1/2" on center, which typically puts the lowest part of the EZ Plus Universal Clevis at about 9.5" on the truck. With the notch in the Clevis at 11-1/2" there will NEVER be 9" of ground clearance with the plow on the truck, NEVER. Simple geometry...



You can see how high the Moldboard is with the plow fully raised, you can also see how low the back of the A Frame is on this truck....



A closer look from the front at how low thaa back of the A frame is on this GM 1500.



I was talking about recent Meyer Service Bulletins related to the SOS. there have been two wiring changes to date since I made the first SOS page here. The 7way trailer plug on the first page is no longer being used, nor are the associated adapters for the back of the existing trailer plug on the vehicle. The T connector for the existing trailer plug on the vehicle is now a Meyer only part, and they went back to a 4 way flat trailer connector with one minor change. What is "normally" the ground pin on the standard 4 way flat connector is now the Reverse Signal to the controller for HFP, not ground. In my shop it does not matter because I will be cutting the plugs off and making hard connections with heat shrink. I will also not have to deal with 10' (exaggerated) of extra wire to bundle up somewhere under the truck. This is SB259 dated October 2017.

The next Meyer Service Bulletin related to the SOS is a problem with 2017 & up Ford Superduty trucks that have the factory trailer brake controller installed. With the Meyer SOS harness connected to the truck trailer wiring, the truck thinks there is a trailer connected, and it disables the rear blind spot / cross traffic detection system, and the back up collision avoidance systems. Part# 23061 must be used, and all the marker and turn signal connections are now made under the hood of the vehicle, at the back of the headlights/turn signals (sound familiar???) except for a nice long blue wire for the reverse signal that can be run to the tail lights, or the harness is long enough to run to the back and connect everything at the tail lights. The 23061 appears to have a relay built into it that will not be serviceable, much like the relay used on the E-73 for the plow headlights. There will be more changes to the SOS system, refinements, etc. I am sure. I will try to update as I find out about them.

I hope you learned even more about the Meyer E-73 SOS.

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