G Archer wrote:Hi everyone, I have A B&S Vanguard 31 HP Model#543477 Type # 0114-E1 Code # 05070 on a Exmark zturn mower.I noticed a bad oil leak around the flywheel side of the engine and a slight knock.I can move the crankshaft up and down approx..010 to .015 thosands of an inch.I looked up parts list and it shows a plain bearing that can be replaced.Part # 843433 for $233.00.Why is this small bushing so expensive?Has anyone replaced one? Thanks for any help. Glenn
Dry Unlubricated - basically an engineered layer of metals - steel backing, bronze or other wear surface (the "babbit") and a PTFE (Teflon) layer - DU is actually a registered trademark of the company that originally engineered them - but many bearings of a similar construction are referred to as "DU" bearings. They can also be called "Oilite" bearings but that's usually a type that is all one metal instead of an engineered compositeG Archer wrote:Thanks for the reply. What does the DU stand for? Thanks,Glenn
bgsengine wrote:It is not simple to replace them - the engine must be torn down completely and then you need special tools (counterbore reamer, bushing driver, and finish reamer) - alignment of the bushing is critical for proper lubrication (Oil Holes). It is not as simple as knocking out the old one and putting in a new one.. unlike with automotive engines...
KE4AVB wrote:bgsengine wrote:It is not simple to replace them - the engine must be torn down completely and then you need special tools (counterbore reamer, bushing driver, and finish reamer) - alignment of the bushing is critical for proper lubrication (Oil Holes). It is not as simple as knocking out the old one and putting in a new one.. unlike with automotive engines...
Must be looking at a different repair manual (272144) than I am as the one I have only indicates a bushing driver, a cylinder support, a punch and a press are the tools are needed; no mention of reamers. Of course an engine tear down is necessary.
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