HELP! Blend Door Arm Broken

1998MarkVIII

1998MarkVIII

New member
Hello All.
I was following J's excellent write up on replacing my blend door actuator http://www.lincolnsofdistinction.or...d-Door-Actuator-Removal-and-Repair-(Write-Up) and after removing the actuator i was removing the bar from the lower "grey" arm and the lower/"grey" arm snapped.

What is this part called, where do i find a replacement, and how do i replace it without causing more damage?

Note: this arm seem stuck as it can only move about 5 degrees.

 
1998MarkVIII

1998MarkVIII

New member
Update:
I was able to identify this part as: Shaft F7LZ19D846BD.



I was able to find one online.

I have started to reassemble everything.
I modified that arm as recommended by J and cut the back out as recommend by Booster http://www.lincolnsofdistinction.org/vbulletin/showthread.php?35012-blend-door-actuator-Revisited

I used the Dorman 604-915 Air Door Actuator https://smile.amazon.com/gp/product/B00YJEZX7S/ref=oh_aui_search_detailpage it has a one piece shaft and arm.

I am still concerned that this does not move freely.

Any Ideas? How far should it move?


 
Last edited:
M

MarkVIIIMarc

New member
Strangely enough, my arm has a barely broken end and I credit that with me having not done a blend door yet. In the summer I leave it cranked to cold and in the winter to hot. Sometimes in the spring or fall it does sorta suck though. However, instead of my blend door moving 500 times over each 30 mile trip to and from work, mine has moved maybe 20 times in the 6 years I've owned the car.

Now I haven't moved it since spring but if no one else chimes in I'd hazard a guess at a 50 degree sweep for the arm?
 
1998MarkVIII

1998MarkVIII

New member
Thank you Marc,
The "black" (upper) shaft does move at least 50 degrees. I tested the sweep before installing.

Its the "grey" lower shaft that seems to be stuck. Anyone?

Hello All,

I have partly reassembled the dash. Enough to be drive-able and put in the "grey" (lower) shaft when it arrives.
I have tested and have heat when the a/c is off.
The A/C still seems to be working. I can not tell if its mixing hot and cold air.

Can someone explain what the "black" (upper) and "grey" (lower) shafts do.
My understanding is that the black shaft opens the hot water flow and the grey opens the fresh air flow?
Am I partly right or totally off the mark?

Thanks,
Y
 
1998MarkVIII

1998MarkVIII

New member
Thank you all for all your help,
I just finished this Job. I was able to install the lower grey shaft.
I first put it in and checked the motion and found that i could hear the inner "gate" move freely.
I could not attach the arm with the grey shaft in place. So i took it out attached the arm and tried to fit it.
I then had to remove the right lower dash bolt so i could pull the dash forward enough to fit it into the whole.
I used the temperature control to rotate it into position and it clicked into place.
I then put back the glove box, etc.


 
You must log in or register to reply here.
Top