CS Prop Installation
 

Can anyone tell me what special tools ( crow foot wrench size... whatever ) I will need to install my CS Hartzell prop? This is my first and those bolts are very hard to get to, I can't even imagine what it will take to get them to the proper torque.

Thanks,

- Jim

Jim

The easiest route is a flat torque wrench such as the one shown below. They come in specific sizes and torques. Heres a good link for some choices...

http://www.aztecbolting.com/index.htm

http://www.aztecbolting.com/pdf/CDIT...re-Set2005.pdf

-Jeff



or

An open end wrench will suffice to tighten the nuts on the prop hub studs. I cut off a section of an open end wrench and welded it to a 1/2" drive socket. Then I calculated with the extra length to get the corrected torque value needed to torque the nuts. Or buy the special tool from Hartzell for $350.00. Other than the Hartzell double crows foot, I could not find one long enough that would work. About a 3" section from a quality open end wrench welded to an impact socket did the trick for me.

Roberta

Try Avery
 

Avery Tools has a handy Hartzell wrench attachment for $39.00. It looks the same as the $200+ from the prop manufacturer and even comes with a torque conversion chart.

weld on a socket
 

to and old 3/4" open end wench...Or wrench even!...:)

Works geat, its free but remember it WON'T be a "certified" weld...Very important that....:)

Frank
RV7a...hopw my prop stays on?

Or the $2 solution. 3/4" combination wrench, bolt, washer, nut:





Nobody's mentioned it yet, but you should only finger tighten the prop bolts until the very end. If they are getting tight before the end, the prop isn't going on straight. You'll need to back off one or more and try again.

Similar idea:

http://bowenaero.com/mt3/archives/20...e_adapter.html

I did mine just like Larry....Oh, that's right, I stole the idea from his web site! (Thanks Larry...)

Paul

Great ideas!
 

Many thanks to all who responded.

I'm sure with all these great ideas, I should have no problems getting the job done.

Clear skies,

- Jim

Torque wrench angle
 

An A&P friend told me that putting the torque wrench 90 degrees from the extension means that the torque reading is accurate and you don't need to do any calculations. If the torque wrench is parallel to the extension then you need to do some math.

Anyone heard anything similar?