Hartzell HC12x20 diaphragm leaks
Posted: Sun Apr 08, 2007 4:40 pm
'Hartzell fliers:
Its time to replace the diaphragm on my Hartzell HC12x20-8 prop. It
works well but has been seeping oil since a few weeks after its last
replacement which makes for a dirty airplane (although rust-free!).
Does anyone flying behind the Hartzell have any good advice on
keeping it dry? Ive contacted Hartzell and they werent able to offer
any advice other than to avoid over-tightening the clamp bolts (which
cracks off the ears). Last time we used a light coat of sealant but
Im not sure if that helped or hurt. It seems that the rubber
compresses over time and the clamp bolts lose torque; I am going to
leave the prop off for a few days and re-torque before finishing
reassembly to see if that helps.
Thanks,
:Dan Michael
:NC81323'
Its time to replace the diaphragm on my Hartzell HC12x20-8 prop. It
works well but has been seeping oil since a few weeks after its last
replacement which makes for a dirty airplane (although rust-free!).
Does anyone flying behind the Hartzell have any good advice on
keeping it dry? Ive contacted Hartzell and they werent able to offer
any advice other than to avoid over-tightening the clamp bolts (which
cracks off the ears). Last time we used a light coat of sealant but
Im not sure if that helped or hurt. It seems that the rubber
compresses over time and the clamp bolts lose torque; I am going to
leave the prop off for a few days and re-torque before finishing
reassembly to see if that helps.
Thanks,
:Dan Michael
:NC81323'