jeffrey_davidson(at)earth
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 Posted: Sat Jun 07, 2008 7:20 pm Post subject: Matco`s Wheel Bearings |
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From: owner-zenith-list-server(at)matronics.com [mailto:owner-zenith-list-server(at)matronics.com] On Behalf Of Clive Richards
Sent: Saturday, September 29, 2007 5:28 AM
To: zenith-list
Subject: Matco`s Wheel Bearings
As per previous report in archives Rays Matco Chinese wheel bearings have also failed 1998/1999 Kit suggest if you have Matco wheels pre 2000 you check the wheels run smoothly & if not fit a reputable make of bearing.
G CBDG CH601 HD Continental 0-200 170 Hrs
| Quote: | | I received Matco wheels with my Gears and Wheels component kit. The wheels are Model W80CC-Z Size 8 Weight 8.0 with a maximum Static Load Capability of 660 Pounds. Mine were made in May of 1999. At the time, Matco was owned by an owner preparing to sell the company. I believe it was sold in 2000 to the current owner(s). I checked the bearings in mine and sure enough one of them was rough operating. I put off replacing them for a couple years, but recently I bought 6 bearings to replace the bearings in all three wheels. The bearing size is 1623DCTN in the NICE brand Inch Ball Bearings. Motion Industries did suggest substituting Chinese made bearings number 1623RS. These are INCH bearings meaning that the size is measured on the English scale, not metric. While it was easy to remove the old bearings with pressure from the opposite side, I found that simply pushing the new bearings into place was not successful. An A&P on my field got the bearings into the first wheel using heat on the wheel and a large drill press to push the bearing in place, but it was not an easy task. He grimaced and struggled with the drill press. I tried a homemade press using a threaded rod, flat washers, and nuts to try to compress the bearings into place without luck. The coarse threads on the only rod I could find were not a help. Even with heat on the wheel to expand it, when I finally got the bearing in place, it was damaged. Today I found the magic! Even though the aluminum wheel should expand at a much greater rate than the steel bearing, the answer was to freeze the bearing. Today was hot so the wheel was warm from sitting in the car. The cold bearing from the freezer slipped into the warm wheel with just a little persuasion from a wooden dowel and soft blows from a hammer. Both bearings went in within just a few minutes. Tomorrow the plane can stand on its tires again. Thanks to Rick Herndon, Clive Richards, and several others not on this email list. I may be the last one to need to address these old wheels, but hopefully this will tell the story for others. Jeff Davidson |
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