Aircon woes

Davehoos · 12th November 2011, 11:23 AM

the front plate has shims to set the air gap.
remove to reset it about 0.5mm+

then test to see if it drags when hot.

problems:
compressor gets old the imput shaft can be pulled in reducing the gap when low pressure is pressent in the suction side of compressor-[cold].so it drags.afte adjusting run withot the cover to test.

Low voltage-i think some have a water overheat relay-most at sometime get an extra relay fitted with direct fused power.some had pressure switch isues-no reason full power must go through these switches.

the thermol overload in the rear dies-it a mechanical switch to brake the circuit when the compressor overheats.
if the clutch has been slipping often the coil needs extra current [evidence of a short].

clutch is common with another car-compressor is not common.replacment compressors are often not the same.

P/s often have to take the high spots of the surface to stop it slipping.the pulley/disc have recessed cooling slots and the high spots cut into the slots breaking the pulley.

**Blknight.aus** · 12th November 2011, 11:29 AM

Im up for a play with it, If I can find the right chuck head for my lathe.

**adm333** · 12th November 2011, 01:58 PM

I'll have a go at removing the shims, and if that doesn't work I'll look at more drastic measures.

I took it out for a drive and it seemed to go a lot longer, so I think the power side has helped, but now it must be clutch itself I'd say.

I saw a yellow billboard saying "Want Longer Lasting Aircon ? "

I might give them a call

**adm333** · 12th November 2011, 03:01 PM

Can anyone recall is it is a right hand or left hand thread to remove the clutch nut ?

**p38arover** · 12th November 2011, 03:17 PM

Originally Posted by adm333

Can anyone recall is it is a right hand or left hand thread to remove the clutch nut ?

Look at the direction that the belt turns over the aircon pulley. Undo the nut in that direction.

**adm333** · 12th November 2011, 03:38 PM

I have managed to get the clutch off. I'm not sure if the copper looking washer in the first picture is the "shim", not having met a shim before.

If so, it seems to be spinning around on a thread or something, it wont just pop off the shaft.

Ron, when it comes to machining did you machine around the contact (red arrow) or the shaft (green arrow) in second picture ?

**Scouse** · 12th November 2011, 03:58 PM

Originally Posted by adm333

Ron, when it comes to machining did you machine around the contact (red arrow) or the shaft (green arrow) in second picture ?

Green !!

**p38arover** · 12th November 2011, 04:26 PM

Originally Posted by Scouse

Green !!

Green!

The thing you can see on the shaft is probably the shim - a thin washer.

**adm333** · 12th November 2011, 04:59 PM

I could not get that washer / ring off, I'm not convinced it is the shim.

It certainly wouldn't prize (sp??) off and I didn't want to force it.

It seems more like the inner ring of the bearing. There is a corresponding outer ring and rubber /plastic texture in between.

Davehoos · 12th November 2011, 05:19 PM

I think he's refer to the inner part of the nose bearing.

the rotor/armature--look about half way out and you see a ridge.this high point can stop the plate getting grip on the shiny chrome looking bits.

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