Jump to content

landing gear donut tools

N9937c

By N9937c
in General Mooney Talk

 Share

Recommended Posts

N9937c Community Regular

N9937c

Posted
Posted

I have just procured a set of mooney landing gear tools. If you need to change rubber donuts these are the way to go.


Also have the fixtures for the overcenter torque. Any body need to use these tools for annual or maint.?


Larry

KLRDMD Grand Master

KLRDMD

Posted
Posted

Quote: N9937c

I have just procured a set of mooney landing gear tools. If you need to change rubber donuts these are the way to go. Also have the fixtures for the overcenter torque. Any body need to use these tools for annual or maint.?

231Pilot Proficient

231Pilot

Posted
Posted

That is the price range, you might find them for a lttle less....I found them for $87 apiece, but they had just sold the last ones they had.  Seems like they could have priced them even lower if they didn't have any :).   I ended up paying $90 apiece plus tax and shipping.  The real expense is the labor in changing all of them.  More than the cost of the donuts.

MooneyMitch Grand Master

MooneyMitch

Posted
Posted

Quote: N9937c

I have just procured a set of mooney landing gear tools. If you need to change rubber donuts these are the way to go.

Also have the fixtures for the overcenter torque. Any body need to use these tools for annual or maint.?

Larry

thinwing Grand Master

thinwing

Posted
Posted

I also have a set o f mooney landinggear preload tools...the donut tool I had to rent from Lazer...which one did you get the screw jack style or the one with the hydraulic pump ????kpc

  • 1 month later...
MooneyMitch Grand Master

MooneyMitch

Posted
Posted

"I have just procured a set of mooney landing gear tools. If you need to change rubber donuts these are the way to go.


Also have the fixtures for the overcenter torque. Any body need to use these tools for annual or maint.?


Larry"


 


Thank you Larry for your generosity with these tools.  Changing the shock discs on Jolie's E is now complete and these tools made it a snap. The tools are now in a nice wooden box so Larry can ship them easily if someone else needs them.   How gracious Larry is!


KLRDMD Grand Master

KLRDMD

Posted
Posted

Quote: Mitch

Thank you Larry for your generosity with these tools.  Changing the shock discs on Jolie's E is now complete and these tools made it a snap. The tools are now in a nice wooden box so Larry can ship them easily if someone else needs them.   How gracious Larry is!

1970m20e Collaborator

1970m20e

Posted
Posted

Interested in the main gear donut changers.  I have the "overcenter" torque tool that I purchased.  I'd like to rent these changers as well.  Great!!!  I have donuts that I bought for $87 last year.  Changed the nose ones on a hydralic press when we were doing the nose gear rebuild in March.


 

jetdriven Grand Master

jetdriven

Posted
Posted

now does anyone have rigging boards?  My shop doesnt have them, although I am rigging the plane myself (under supervision)

danb35 Mentor

danb35

Posted
Posted

Quote: jetdriven

now does anyone have rigging boards?  My shop doesnt have them, although I am rigging the plane myself (under supervision)

  • 4 weeks later...
KLRDMD Grand Master

KLRDMD

Posted
Posted

Quote: 1970m20e

Interested in the main gear donut changers.  I have the "overcenter" torque tool that I purchased.  I'd like to rent these changers as well.  Great!!!  I have donuts that I bought for $87 last year.  Changed the nose ones on a hydralic press when we were doing the nose gear rebuild in March.

  • 8 months later...
flyboy0681 Grand Master

flyboy0681

Posted
Posted

Question regarding replacement of the biscuits themselves. The annual on my '83 J will take place this month and all of the biscuits are being replaced, having been installed in 2000. After they are replaced can I expect anything different in ground handling?


 

  • Like 1
Guillaume Collaborator

Guillaume

Posted
Posted

Quote: flyboy0681

Question regarding replacement of the biscuits themselves. The annual on my '83 J will take place this month and all of the biscuits are being replaced, having been installed in 2000. After they are replaced can I expect anything different in ground handling?

 

jetdriven Grand Master

jetdriven

Posted
Posted

You can rent the Mooney factory tool to change the nose gear donuts (and do SB M20-202) from LASAR.  Cost is 50$ plus shipping.  

  • 1 month later...
Bill_Pyles Collaborator

Bill_Pyles

Posted
Posted

What is the deal with replacing the landing gear donuts?  Mine say 1998 and they look great, as in no cracks and they are smooth and black.  I have read that they need to be replaced every 5 years and up to every 15 years.  Has anyone tested the resilience of the old disks versus new disks?  Has anyone checked them with adurometer?  Are old discks harder or softer than new disks and what is the effect of the difference in terms of ride and handling characteristics?  Does anyone know the science on these Lord disks, or is the replacement of them based partly on tribal tradition?  I would really like to know.

MooneyMitch Grand Master

MooneyMitch

Posted
Posted

Hi Bill.


In my experience, this is what I have found.  Hoist your aircraft.  Let it sit for a few minutes.  For the mains, if you can spin the shock discs by hand, it is time for replacement. 


Another way to test, is again with the aircraft hoisted, push and pull in a front to rear motion on the wheel.  If you feel excessive play, that's a good sign to replace.


Seems the talk is that the long body discs do not last as long as those on the shorter body airplanes due to weight differences.


I have realized a "ride" difference with the new shocks........smoother. 


You can actually change the mains with out the gear tools.  The nose, you do need to have the specified tool.


Hope that helps.


 

KSMooniac Grand Master

KSMooniac

Posted
Posted

I believe there is some guidance in the service manual about checking the condition.  Life span is variable based on climate, use, storage, and weight (ie heavier long body Mooneys stored outside in the desert won't last as long).  I believe the check is when the plane is jacked and the weight removed from the wheels... the donuts should rebound from their compressed state such that they fill the space between the retainers and they should not be able to be turned by hand, or especially see daylight between the retainers and the donuts.

 Share
Go to topic listing
×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.