1086 a/c

Davin · Jul 13, 2011

I had to replace a steel a/c line on the 1086. It is a 134 system. I attempted to recharge the system but have a question about the valves that are present on the low and high pressure schrader valve. Do I turn these valves clockwise or counter clockwise to open and do you close them after charging the system. For those concerned I have the manual for the 1086 but there is no information regarding the a/c system. I have also read the a/c forum back to 2006 but could not find an answer. I did find some interesting feedback written by Allen regarding his charging methods. Your help is greatly appreciated
Davin

Allan in NE · Jul 13, 2011

Tighten to open.

I always close them back up when I'm done even tho the snap on 134 connector should hold it.

Allan

pete 23 · Jul 13, 2011

I'll just add to what Allen said, turn them in to open but, only part way. If you turn them in all the way it will close off the line so you could not charge it . They call this front seating, and turning them out is called back seating. They can be darn tight sometimes also.

Pacer 54 · Jul 13, 2011

While we're on 1086 AC may I barge in? My 1086 rains from vents after several hours running. I've removed lid to clean drain tubes from drip pan, even pulled 1/4" wire rope through as a brush.Compressed air whistles through and you can blow through tube easily. What am I missing? TIA

Allan in NE · Jul 14, 2011

This is hard to explain, but I'll try and this is a hard nut to crack as humidity is a huge factor; however:

Assuming that the evaporator and condenser are clean, tubes and pan are in good shape (no rusted holes in the pan, no cracks, plugs or leaks in the tubes), try pulling that thermostat back just a tiny bit at a time until it just quits raining.

A thermostat set "too cold" causes the the evaporator to block up with ice, thaw and then dump the melt-water over and over again in a repeating cycle.

If you can feel the air at the outlets being really, really cold then all of a sudden it seems to warm a tad for a time and then back to really cold again, that thermostat is running way too cold and the evaporator is freezing over.

Gotta find that 'happy medium' with the temp control. That pan is kind of like trying to carry a saucer full of coffee; they will 'spill over' if too full. :>)

Allan

Pacer 54 · Jul 14, 2011

Thanks Allan, I'll try that. Good idea to leave those rubber nipples in place at bottom end of drain tube?

IaGary · Jul 14, 2011

As long as they are not plugged leave them there. They keep the spiders from building a nest in there.

Gary

JDB · Jul 15, 2011

Thanks for the advice Allan, my 886 does the same thing when the AC is run for a long time. Pan is in good shape, tubes and coils are clear but rains in the cab. I will try your advice.

ben brown · Jul 15, 2011

here in ky where we have a lot humidity all the time the drain tube well run most all the time. it is a good way to see if you a/c is working good. what i have found is you need to lift the evaporator up and away from the pan as dirt and crud collect under it, also here mud dobbers can cause them not to flow. but most of the time they are plugged you might be able to force air through them but water wont flow that is not under pressure.

1086 a/c

Davin

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Allan in NE

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pete 23

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Pacer 54

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Allan in NE

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Pacer 54

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IaGary

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JDB

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ben brown

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