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To:  lml@lancaironline.net
Date: Fri, 09 May 2014 07:59:43 -0400
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From: Chris Zavatson <chris_zavatson@yahoo.com>
Reply-To: Chris Zavatson <chris_zavatson@yahoo.com>
Subject: Re: [LML] [LNC2] Fast taxi testing - found the problem
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=0A=0AJohn,=0AA little pre-load is actually beneficial in roller bearings.=
=A0 You apparently had a too much on one wheel.=0AI re-grease my bearings e=
very year and during installation tighten the nut until I get just under on=
e revolution of spin.=A0 It is a good idea to re-check this after a few hou=
rs of use.=0Ahttp://www.timken.com/en-us/products/Documents/Timken-Engineer=
ing-Manual.pdf=0A=0AChris Zavatson=0AN91CZ=0A360std=0Awww.N91CZ.net=0A=0A=
=0A=0A=0A=0A=0AI did discover the real problem, though. When I put the plan=
e up on    jacks and spun the wheels, the left main and nose both spun abou=
t    1-1/4 turns. The right main would hardly turn at all. The        axle =
nut on the right wheel was one flat too tight.    The wheel was dragging an=
d my brand new tire had several flat spots    on it. When I loosened the ax=
le nut, the wheel turned freely so it    wasn't the brakes per se. I DO nee=
d to inspect the brakes on that    side as well because things got pretty h=
ot over there.=0A=0AI'm just glad it's not the oleo strut!=0A=0ADo we have =
an end-play specification for tightening the axle nuts?=0A=0AThanks for all=
 the suggestions, everybody --
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<html><body><div style=3D"color:#000; background-color:#fff; font-family:ti=
mes new roman, new york, times, serif;font-size:14pt"><div><br></div><div>J=
ohn,</div><div>A little pre-load is actually beneficial in roller bearings.=
&nbsp; You apparently had a too much on one wheel.</div><div>I re-grease my=
 bearings every year and during installation tighten the nut until I get ju=
st under one revolution of spin.&nbsp; It is a good idea to re-check this a=
fter a few hours of use.</div><div><a href=3D"http://www.timken.com/en-us/p=
roducts/Documents/Timken-Engineering-Manual.pdf">http://www.timken.com/en-u=
s/products/Documents/Timken-Engineering-Manual.pdf</a></div><div><br></div>=
<div>Chris Zavatson</div><div>N91CZ</div><div>360std</div><div>www.N91CZ.ne=
t</div><div><br></div><div><br></div><div><br></div><div><br></div><div><br=
></div><div><br></div><div>I did discover the real problem, though. When I =
put the plane up on    jacks and spun the wheels, the left main and nose
 both spun about    1-1/4 turns. The right main would hardly turn at all. <=
b><big><font size=3D"5">The        axle nut on the right wheel was one flat=
 too tight</font></big></b>.    The wheel was dragging and my brand new tir=
e had several flat spots    on it. When I loosened the axle nut, the wheel =
turned freely so it    wasn't the brakes per se. I DO need to inspect the b=
rakes on that    side as well because things got pretty hot over there.<br>=
<br>    I'm just glad it's not the oleo strut!<br><br>    Do we have an end=
-play specification for tightening the axle nuts?<br><br>    Thanks for all=
 the suggestions, everybody --</div></div></body></html>
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