Copper Crushwasher

How to keep the Cessna 170 flying and airworthy.

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jmbrwn
Posts: 53
Joined: Sat Jun 12, 2004 12:50 pm

Copper Crushwasher

Post by jmbrwn »

Just changed oil for first time on my plane. Did a search here and got good info, and things went smoothly. Question though, I noticed that I have a 1" nut in front of the big square nut which holds oil screen with the AN900-28 copper crush washer. The 1" nut also had a copper crushwasher on it, but much smaller. Anyone know offhand the size of this washer? Should I change it at every oil change also?
Jim Brown
N9753A
'49 C170A
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N1478D
Posts: 1045
Joined: Mon Apr 22, 2002 5:32 pm

Post by N1478D »

It's an AN900-10. I change it if that nut turns on the oil screen. Sometimes get thru the oil change without that one turning and don't have to replace the crush gasket. As a side note, SNAP-ON tools has a thin open end wrench that works really well on the oil screen.
Joe
51 C170A
Grand Prairie, TX
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jmbrwn
Posts: 53
Joined: Sat Jun 12, 2004 12:50 pm

Post by jmbrwn »

Tom- Thanks for the info. I'll check out Snap-On tools.
Jim Brown
N9753A
'49 C170A
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