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Jacking .....Up

N

NunavutPA-12

FRIEND
67.8N,115.1W CYCO Canada
I need to jack up my PA-12 (-18 gear) to replace the bolts in the cabane, lower strut attach and forward landing gear fitting with longer ones to accommodate the safety cables.

Is it safe to put a jack under the cabane-v? Better method?
 
Pull the top cowl and Use a hoist lifting off the motor mount not the engine lifting eye



jason
 
Well, I could, but with great effort since my hoisting gear can't fit in the hangar and I can't lift from the trusses. I was looking for a faster, easier method using just a jack.
 
Place a two by four under the one wing tie down ring, raise the wing thus the aircraft, chock it, and pray, other wise use a hoist as jgerard suggested.;-)
 
I saw a guy last week that used a regular jack with an attachment that was length adjustable like a tent pole that had a little yoke that went under the prop flange and lifted it up so he could service the front strut (obviously not a PA-12) but it is an idea. I have a 3' continuous loop that I hook with but still requires a hoist.
 
Use the Dodge lifting eyes and hoist the thing...jacking is a disaster waiting to happen...
 
I wouldn't jack the airplane up on the cabane and then take the lower shock strut attach bolts out for fear of bending the cabane. You would have to level the airplane so that the load is straight up through the cabane and not at the angle you get while in the 3-point and trying to jack off the floor.

You can lift from the truss if you put a 2x4 or 2x6 between the truss and the floor. Then a simple chain fall or come along will get that plane off the ground. Hanging is 10 times safer than jacking. You may have to smack out those old bolts with a hammer and I wouldn't want to get aggressive if I was on jacks.


Jason
 
I can attest to a near disaster when trying to jack up my PA18. Despite having three of us who felt all was under control the aircraft slipped off the jack, but fortunately noone was hurt and there was no damage to the aircraft. Used the Atlee lift rings with a well-supported rafter hoist and it makes it an easy, safe operation.

Randy
 
Here is one answer, a wood or steel gantry.

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That's a nice rig.

My homemade engine hoist is not that fancy and I will have to set it on blocks to get the height I need but think I will take everyone's advice and hoist rather than jack.
 
These jacking lugs probably won't help you out but they work great. They get welded onto the rear gear fitting and protrude out the fabric. It's a good, solid, safe place to jack. Dakota Cub has them STC'd for all PA18's and they are free, except for the shipping.101_0085.JPG101_0088.JPG101_0089.JPG101_0091.JPG101_0093.JPG
 

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Uh, pounding out bent gear bolts while sitting on jacks, is not for the feint of heart... But definitely more suited for the fleet of foot...
 
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