Rebuilding a Meyer E-47 Pump - Step by Step
These pages will be updated to fill in any gaps in the sequence. It is not always easy to remember to grab the camera when doing a job, and others at the same time! We are putting this up to help Members of the LetsTalkSnow.com Discussion Forums, as well as visitors of Snowplowing-Contractors.com, and our customers, to help everyone understand what is involved in rebuilding these units. By far we rebuild more of these than any other pump. I need to say now DO NOT TAKE THE ACTUAL PUMP APART. No parts are available for it!
Here it is mounted on the 84 GMC.
You can see the coupler has been leaking at the pump for a while. The top seal may be leaking too.
Here it is in the vise ready for the process to start. The 90� swivel fitting is leaking not the coupler.
We begin the process by cleaning all the paint off the lift ram using a 3M Scotchbrite pad. The ram must be clean to allow the top cap of the reservoir to be removed. Any burrs around the hole where it was bolted to the lift arm must also be carefully filed down.
Next we remove the drain plug. You can remove the fill plug in the cap to speed draining. About a quart of hydraulic fluid should come out. Note that in the pic a different drain pan was used to catch the bulk of the fluid. The shallow pan was then used to tip the pump and get even more out. Note the milky blue color of the fluid. This pump had a lot of water in it. The 2 plugs to the right of the drain plug can be removed, along with the filters in those ports. I put the plugs back in hand tight to stop the pump from dripping on the bench after draining.
Next we remove the nuts on the studs that hold the top cap on. We use a 1/2" wrench for this. It is not uncommon for the studs to unscrew instead of the nylock nuts. It is OK if that happens. If it does, do not try to pull the studs completely out after loosening, you will see why in the next pics.
Under the nuts are special nylite washers. They crush and seal the holes when the nuts are tightened. They cannot be reused. You must use new "nylite" washers when putting the cap back on. When tightening the nuts to spec the washers flatten out, making a seal.
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You can find all the parts you need to rebuild it yourself at SmithBrothersPlowParts.com (Our Online Store)
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Author: Chuck Smith