RV-2 AC clutch locks up after getting hot
#3052833
06/23/22 09:52 PM
06/23/22 09:52 PM
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Joined: Nov 2004
Posts: 64 Anchorage AK
AKcharger
OP
member
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OP
member
Joined: Nov 2004
Posts: 64
Anchorage AK
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I had the ENTIRE AC system refurbished...EVERYTHING. System runs fine, pressures about 30 PSI low side and 185 high side. after about 15 minutes f I drive it the clutch starts to lock up (belts NOT slipping) and pressures bounce around 85 Low side and 150 high side. has anyone seen this and have an idea what's wrong?? https://youtu.be/OwhaJn5edt8
Last edited by AKcharger; 06/23/22 09:53 PM. Reason: wrong place
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Re: RV-2 AC clutch locks up after getting hot
[Re: AKcharger]
#3052847
06/23/22 11:13 PM
06/23/22 11:13 PM
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Joined: Feb 2003
Posts: 1,637 Florida
GMP440
top fuel
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top fuel
Joined: Feb 2003
Posts: 1,637
Florida
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Yes, I have seen and experienced this a couple months ago. The clutch plate is not gripping the pulley. Had this happen a few months ago on a Denso compressor on my 91 Ford Crown Vic. The clutch plate was not gripping the face of the pulley and was slipping making that same noise. I fixed that by getting a clutch and pulley from another denso compressor that was on an 89 Lincoln Town Car that was in a salvage yard. Everything has been good ever since. To rule out the compressor, turn the engine off , turn the key on for power to the accessories, then, with a gloved hand just turn the clutch, rotating the compressor. If it turns freely, the compressor is not locked. Then only thing left is the clutch plate losing it's grip. Also, as someone stated remove the belt and spin the pulley to make sure that is rolling free.
Last edited by GMP440; 06/23/22 11:23 PM.
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Re: RV-2 AC clutch locks up after getting hot
[Re: stumpy]
#3052939
06/24/22 11:28 AM
06/24/22 11:28 AM
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Joined: Jan 2003
Posts: 1,602 westerly, ri. usa
440lebaron
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top fuel
Joined: Jan 2003
Posts: 1,602
westerly, ri. usa
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as i recall the clutch has a shim adjustment, small washer on shaft 3/8 5/16 dia??
all parts are sold as is, all parts are considered used no warranties or returns paypal/check/money order, shipping is from zip 02891, buyer pays paypal fees 24% IRS 1099A plus 3% of part price, check/money order preferred site is not monitored 24/7 there might be a delay in response
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Re: RV-2 AC clutch locks up after getting hot
[Re: AKcharger]
#3052995
06/24/22 02:01 PM
06/24/22 02:01 PM
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Joined: Jan 2003
Posts: 1,908 Nebraska
4406bbl
top fuel
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top fuel
Joined: Jan 2003
Posts: 1,908
Nebraska
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I would say it is overcharged and burnt the clutch. Is it 134 or r-12 freon? There is a break in procedure for those, switch on off 10 times when it is a new clutch, I think that is a joke, a way out of warranties for the reman companies. In the 80s clutches were smoking all the time, that was their way out of warranties, what was actually happening on some mopars is the a/c switch could not pass enough current to hold the clutch reliably and they would smoke it. It could also be the coil behind the pulley is weak. When you change your clutch install a jumper wire straight to the battery and run it that way until charged and cooling, then try the original wiring, if it squeeks on the original you know your dash switch is bad. Anyway some cars were real bad about it, a 20 amp dual pole toggle switch, a fuse and some wire is your friend, I don't trust 50 year old dash switches if the clutch is smoking.
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Re: RV-2 AC clutch locks up after getting hot
[Re: 4406bbl]
#3053028
06/24/22 03:23 PM
06/24/22 03:23 PM
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Joined: Jan 2003
Posts: 18,407 UPPER MICHIGAN, MARQUETTE COUN...
NITROUSN
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 18,407
UPPER MICHIGAN, MARQUETTE COUN...
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I would say it is overcharged and burnt the clutch. Is it 134 or r-12 freon? There is a break in procedure for those, switch on off 10 times when it is a new clutch, I think that is a joke, a way out of warranties for the reman companies. In the 80s clutches were smoking all the time, that was their way out of warranties, what was actually happening on some mopars is the a/c switch could not pass enough current to hold the clutch reliably and they would smoke it. It could also be the coil behind the pulley is weak. When you change your clutch install a jumper wire straight to the battery and run it that way until charged and cooling, then try the original wiring, if it squeeks on the original you know your dash switch is bad. Anyway some cars were real bad about it, a 20 amp dual pole toggle switch, a fuse and some wire is your friend, I don't trust 50 year old dash switches if the clutch is smoking. His pressure readings would show if it was overcharged. Which they do not. I agree he could try 12 volts direct to the clutch to eliminate all the rest of the electrical system. For what it is worth I have never seem much clutch failures as the old rv2 was fairly reliable.
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Re: RV-2 AC clutch locks up after getting hot
[Re: 4406bbl]
#3053065
06/24/22 04:44 PM
06/24/22 04:44 PM
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Joined: Feb 2015
Posts: 2,070 CA
crackedback
top fuel
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top fuel
Joined: Feb 2015
Posts: 2,070
CA
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I would say it is overcharged and burnt the clutch. Is it 134 or r-12 freon? There is a break in procedure for those, switch on off 10 times when it is a new clutch, I think that is a joke, a way out of warranties for the reman companies. In the 80s clutches were smoking all the time, that was their way out of warranties, what was actually happening on some mopars is the a/c switch could not pass enough current to hold the clutch reliably and they would smoke it. It could also be the coil behind the pulley is weak. When you change your clutch install a jumper wire straight to the battery and run it that way until charged and cooling, then try the original wiring, if it squeeks on the original you know your dash switch is bad. Anyway some cars were real bad about it, a 20 amp dual pole toggle switch, a fuse and some wire is your friend, I don't trust 50 year old dash switches if the clutch is smoking. Or do something like this...
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Re: RV-2 AC clutch locks up after getting hot
[Re: AKcharger]
#3053069
06/24/22 04:48 PM
06/24/22 04:48 PM
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Joined: Feb 2003
Posts: 1,637 Florida
GMP440
top fuel
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top fuel
Joined: Feb 2003
Posts: 1,637
Florida
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I had the ENTIRE AC system refurbished...EVERYTHING. System runs fine, pressures about 30 PSI low side and 185 high side. after about 15 minutes f I drive it the clutch starts to lock up (belts NOT slipping) and pressures bounce around 85 Low side and 150 high side. has anyone seen this and have an idea what's wrong?? https://youtu.be/OwhaJn5edt8 When you've done all the checks and the clutch is still slipping; take the clutch off and show pics of the clutch face and the pulley face to see the wear on those parts.
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Re: RV-2 AC clutch locks up after getting hot
[Re: NITROUSN]
#3053167
06/24/22 10:22 PM
06/24/22 10:22 PM
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Joined: Jan 2003
Posts: 1,908 Nebraska
4406bbl
top fuel
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top fuel
Joined: Jan 2003
Posts: 1,908
Nebraska
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I would say it is overcharged and burnt the clutch. Is it 134 or r-12 freon? There is a break in procedure for those, switch on off 10 times when it is a new clutch, I think that is a joke, a way out of warranties for the reman companies. In the 80s clutches were smoking all the time, that was their way out of warranties, what was actually happening on some mopars is the a/c switch could not pass enough current to hold the clutch reliably and they would smoke it. It could also be the coil behind the pulley is weak. When you change your clutch install a jumper wire straight to the battery and run it that way until charged and cooling, then try the original wiring, if it squeeks on the original you know your dash switch is bad. Anyway some cars were real bad about it, a 20 amp dual pole toggle switch, a fuse and some wire is your friend, I don't trust 50 year old dash switches if the clutch is smoking. His pressure readings would show if it was overcharged. Which they do not. I agree he could try 12 volts direct to the clutch to eliminate all the rest of the electrical system. For what it is worth I have never seem much clutch failures as the old rv2 was fairly reliable. His pressure readings at idle do not show overcharge, what are they when the engine is at 2000-3000 rpm? What freon, if 134 it should bubble at the sight glass I have seen rv-2 systems with bad expansion or epr valves pull the low side into a vacuum... and smoke the clutch.
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Re: RV-2 AC clutch locks up after getting hot
[Re: 4406bbl]
#3053225
06/25/22 09:11 AM
06/25/22 09:11 AM
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Joined: Jan 2003
Posts: 18,407 UPPER MICHIGAN, MARQUETTE COUN...
NITROUSN
I Live Here
|
I Live Here
Joined: Jan 2003
Posts: 18,407
UPPER MICHIGAN, MARQUETTE COUN...
|
I would say it is overcharged and burnt the clutch. Is it 134 or r-12 freon? There is a break in procedure for those, switch on off 10 times when it is a new clutch, I think that is a joke, a way out of warranties for the reman companies. In the 80s clutches were smoking all the time, that was their way out of warranties, what was actually happening on some mopars is the a/c switch could not pass enough current to hold the clutch reliably and they would smoke it. It could also be the coil behind the pulley is weak. When you change your clutch install a jumper wire straight to the battery and run it that way until charged and cooling, then try the original wiring, if it squeeks on the original you know your dash switch is bad. Anyway some cars were real bad about it, a 20 amp dual pole toggle switch, a fuse and some wire is your friend, I don't trust 50 year old dash switches if the clutch is smoking. His pressure readings would show if it was overcharged. Which they do not. I agree he could try 12 volts direct to the clutch to eliminate all the rest of the electrical system. For what it is worth I have never seem much clutch failures as the old rv2 was fairly reliable. His pressure readings at idle do not show overcharge, what are they when the engine is at 2000-3000 rpm? What freon, if 134 it should bubble at the sight glass I have seen rv-2 systems with bad expansion or epr valves pull the low side into a vacuum... and smoke the clutch. Wrong vacuum will never hurt a clutch. High pressures will cause strain and possible failures. Never, never, vacuum.
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