Title: Nose gear bearings
Post by: ezpilot on November 23, 2007, 09:53:04 PM
Tom, If you have the money go ahead and do what Waiter says...buy it. It is certainly a better system than the brass bushings. I personally feel that the bushings are the way to go. Easy to change and WAY cheap. I have changed the sets on all my EZs. Two Vari s and now my Long. No big deal, you can almost push them out by hand. I think I'm going to have 12 bucks in the repair. But like I said, if you don't mind the expense, a Jack Wilhelmson mod is way cool. Best wishes, Dana Byerley LEZ N7015T Tooele EZ Sqd I Tooele, Utah
Title: NG 6 Bearing Replacement
Post by: Dan Dare on November 26, 2007, 05:12:25 PM
Hi
I did post this before, but I guess it was lost with everything else.
There have been some posts on this subject.
I had a Long-Ez, which had nose leg play, when I built my current aircraft I did the following, which has proved successful.
I hope this helps.
Dan - - - - - - - - - - - -
A method to eliminate side play in the Nose Gear strut and NG6 Casting.
After some time in operation the standard Oilite bearings in the NG6 casting can develop play which can affect accurate steering.
For new build aircraft a larger casting with taper roller bearings can be obtained and fitted. This fix requires removal of the NG6 casting on existing aircraft.
For aircraft owners who do not wish to remove the NG6 casting from the Nose Leg the following procedure may be used.
Remove the nose gear strut and push out the NG 23 Oilite Bearings.
At a local machine shop, have the NG 23 Bore, Reamed to 0.6875" and the casting sides Spot Faced to 1.000" to clean up normal to the bore.
A good machine shop should be able to achieve this at nominal cost, without causing any damage to the nose gear leg or NG6 Casting.
The following Parts need to be obtained:
- Nose Gear Pivot Bearings
- Torrington Drawn Cup Full Complement Needle Roller Bearing,
2 Required, Part No B-810 0.500" ID. 0.6875 OD. 0.625" Wide, or similar.
The NG7 Pivot has been used without modification but for long term operation the following should be done:
- The Nose Gear NG7 Pivot should be hardened to 58 HRC and a small spacer made, 0.500" ID. 0.625 OD. length to suite, to keep the bearings positioned.
If getting the NG7 hardened is difficult it is also possible to use the Torrington Inner Ring Part No IRA-5 with the B-88 Bearing and machine spacers to suite.
Nose Gear Thrust Bearings and Washers:
- Torrington Thrust Roller and Cage.
2 required, Part No NTA815.
- Small Thrust washer Part No TRA 815-0.030".
- Medium Thrust Washer Part No TRB 815-0.060".
- Large Thrust Washer Part No TRC 815-0.092".
You will need to buy some of each thrust washer because it is difficult to determine what thickness or stack you'll need until you have several washers to use.
Assemble the parts, install the Pivot Bearings into the NG6 separated by the spacer and use the Hardened Thrust Washers each side of the Thrust Bearings. Use additional washers to eliminate play and centralise the Gear Leg. An `O' Ring can be used around the Thrust Bearing as a grease seal.
The Bearings can be obtained from the following or your local Torrington supplier.
Precision Bearing 2635 S Fairfax Ave Culver City, CA 90232 (800)-752-3500 in CA (800)-421-0602 outside CA (310)-836-9319 fax