County Air Con Vacuum Lines

[p38arover]

I was hoping someone will have a schematic drawing of the vacuum lines for a 1984 110 County air con/heater system.

In the rear of the heater control panel on mine is a "D" shaped connector - much like a computer D-connector. there are 7 positions for vacuum lines on this in two rows (3 "pins" and 4 "pins"). Four of the lines are blanked off.

My problem is that I can only find two vacuum lines in behind the dash which would obviously connect to the connector - the others go to the vacuum servos. If I had a schematic I might be able to sort it out.

Any assistance would be appreciated.

Ron

[DeeJay]

I'm glad you said 4 were blanked off, as mine is the same, I thought maybe I had done it years ago & forgotten.
Do you have 3 lines, and two of them create a suction?
Unfortunately there is nought on this in the 1984 onwards workshop manual, so I hope you get a positive reply, as I think mine could be wrong too.
:roll:

[p38arover]

I found the third line tucked down out of sight and have drawn up a schematic diagram.

I have the dash back together after repairing the switch panel - melted from too big a globe and mounting tabs broken off, a broken duct which allowed the vacuum servo to move without moving the flap, rerubbering the flaps for better sealing, repairing the clock, etc.

I painted the dash in special paint so it looks nice and clean once more.
I shall have to buy some new vents to finish it off.

I'll draw the schematic neatly and post it on my website in the next day or so.

Ron

[maggsie]

Ron,
is there a procedure outlining the sequence for pulling the County dash apart. My heater controls are not connected as a previous owner has installed a pullout lever (next to the hand throttle) to open up the heater valve.
Thanks
Maggsie

[p38arover]

The heater lever in the dash operates a flap in the heater under the bonnet. At the same time, as it reaches the fully cold position, it depresses a button on a vacuum control valve on the outside of the heater case (under the bonnet). This allows vacuum to operate the hot water valve and close the water flow to the heater.

On mine, the heater control wasn't reaching the vacuum valve so hot water flowed all the time. That I found this morning.

I now have a fully operational heater system - pity I don't have air con (yet).

Ron

[DeeJay]

Ron,
Glad to see you worked it out.
I recently fitted a newer model aircon compressor to my County, it only needed a 10mm spacer to align. Got new hoses fitted - After 6 years I had lost the old ones and the compressor had siezed- and gassed up and it works fine https://www.aulro.com/afvb/

http://landie.bigblog.com.au/data/0/3683/image/plate4035620060407104153_m.jpg

[Carslil Jim]

Ron,
Did you ever draw up a scematic of the vacuum plug that goes on the back of the A/C - Heater Control Unit . Mine has disintegrated and I cant get a new one so I will have to make one up.

I know I have three incoming lines.

[p38arover]

Oooo. I'm not sure if I have anything any more Jim. That was 5 years ago and I sold the County not long after. I'll look.

[Carslil Jim]

Ron,
Thanks for having a look. I thought overnight it can't be too complicated. There would be 1 hose in coming (from the manifold or somewhere), and then three out. Challenge is to figure out what goes where.

Regards

Jim

[p38arover]

I have these very blurry photos but I'm sure there is a drawing I made somewhere. (I hadn't realised I'd bumped a camera control and it wasn't focussing.)

http://www.aulro.com/afvb/attachments/90-110-130-defender-county/22738d1266570933-hissing-dash-heater_2.jpg

http://www.aulro.com/afvb/attachments/technical-chatter/35240d1303376014-county-air-con-vacuum-lines-heater_3.jpg

[Carslil Jim]

Ron,
Thanks again! That is the plug for sure. Attached is a picture of mine. As you can see the holes that were being used have disintegrated. If that diagram turns up I am definitely interested.
http://www.aulro.com/afvb/attachments/technical-chatter/35255d1303422961-county-air-con-vacuum-lines-plug.jpg

[rover-56]

Jim,
You don't really need that orange plug. Mine fell apart too, and I just connected the plastic tubes direct to the valve with short bits of 3mm neoprene fuel/vacuum hose.
You can connect them to the right places by trial and error, there is one vacuum tube from the little round reservoir under the RH mudguard, then just connect the other 3 until all the air flaps work when they should.
Cheers,
Terry.

ps I will be going in to fix a non working LH air flap in the next few weeks, and I will take some pics then.

[p38arover]

ps I will be going in to fix a non working LH air flap in the next few weeks, and I will take some pics then.

I found that the actuator had broken free on one of mine. Whilst I was in there, I replaced the thin foam seals with new closed cell foam about 3-4mm thick. I have a lot left over if you need some

[p38arover]

Ron,
Thanks again! That is the plug for sure. Attached is a picture of mine. As you can see the holes that were being used have disintegrated. If that diagram turns up I am definitely interested.


Oooh! Ugly.

[rover-56]

Thanks Ron,
I have a bit of that stuff left. I did a rebuild of the heater/aircon box late last year (what a job that was!!!).
Was hoping to get the aircon working before summer, but it wasn't meant to be, there were multiple leaks in the A/C system, still have a couple to fix.
At least the heater works for the winter.:D:D

Cheers,
Terry

[p38arover]

.
At least the heater works for the winter.:D:D

Cheers,
Terry

I found the heater worked in summer and the cooling in winter!

[Carslil Jim]

Ron and Terry,
Thanks again. I will try Terry's method and see what I get. I am most interested in getting some warm air for the winter, but if I get the flaps working maybe there is hope for the A/C which I figure is at least out of gas.

This has been a tragi-comedy. The fan doesnt come on either. I know the motors good, but there is a gremlin in the heavily modified and undocumented electricals.

First I will get the flaps operational and then it is off to the auto electrician as I have spent hours and hours on the fan electricals and just can't track down the problem.

Such is life.

Regards

Jim

[Carslil Jim]

I had a good day yesterday! I did trial and error with the vacuum and got the vent flaps working for the dash and the windscreen.

I am not at all sure I have connected/blocked the lines correctly, but I have a start point. I did not try to get the A/C vacuum line going.

At this stage I only want heating in the cab. I will wait until summer again before I worry about the air con.


In the diagrams attached I get the dash flaps opening when button C is depressed, and dash plus windscreen with B depressed, when the vacuum lines are attached as shown. If anyone knows what the three buttons are actually for please let me know as my hand books dont refer to them.


And if there is a more correct way of connecting the tubes I would take advice.


Thanks to all for notes and posts. Drinks owed!



Jim