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post #1 of (permalink) Old 02-27-2005, 10:37 PM Thread Starter
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1981 CJ with A/C belt routing

This stuff was all taken off some time ago and I didn't do it myself... So while reinventing the wheel or belt routing as the case may be. Here's what I was able to puzzle back together. Nothing is tightened down... just sitting there for this picture (I just might need it later).

Does this look right for a 1981 CJ with A/C?



Click the picture for a very (NOT DIAL UP FRENDLY) large picture.

Power Steering pump is understood and don't worry about that hook on the top driver's side... Smog Pump not required.

It all looks like OBA parts to me now.

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post #2 of (permalink) Old 02-27-2005, 11:05 PM
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Re: 1981 CJ with A/C belt routing

Did you forget the water pump? You just might need it.
Otherwise it looks about right....Mine is the serpentine so I'm not an expert on your model.
post #3 of (permalink) Old 02-27-2005, 11:33 PM Thread Starter
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Re: 1981 CJ with A/C belt routing

[ QUOTE ]
Did you forget the water pump? You just might need it.
Otherwise it looks about right....Mine is the serpentine so I'm not an expert on your model.

[/ QUOTE ]

[img]images/graemlins/chairfall.gif[/img] No that comes along with the Power Steering Pump and the first belt out from the motor. Two shown and three required (four if you include the Smog Pump).

Yep just might need that.

I should just go find an old California 1982 AMC Egale... those were serpentine with A/C (I had one for years).

Thanks

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post #4 of (permalink) Old 02-28-2005, 03:02 AM
 
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Re: 1981 CJ with A/C belt routing

How many v-groove pulleys on that harmonic balancer??

I only have 2 and they hook up this way.

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post #5 of (permalink) Old 02-28-2005, 07:55 AM Thread Starter
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Re: 1981 CJ with A/C belt routing

That looks more like the Kilby setup. What year is that?

Three on the crank (maybe 1981 was a freak?):

1st groove is ~6" diameter to water pump (one groove) and to power steering pump (one large groove and one small to run smog pump)

2nd groove is ~7" diameter to A/C (OBA) compressor (one groove)

3rd groove is ~7" diameter to alternator (one groove)

Very Interesting.

Thanks

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post #6 of (permalink) Old 02-28-2005, 08:03 AM
 
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Re: 1981 CJ with A/C belt routing

I'm running the same set-up,
Yep, that's how a 3 belt system is routed,
I've also seen the 2 belt in the other pic,
Either way works,
Your gonna love OBA,
Mine gets a workout on every wheeling trip,
Air gets a fire going good too,

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post #7 of (permalink) Old 02-28-2005, 09:00 AM
 
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Re: 1981 CJ with A/C belt routing

80 Something Eagle.
I've seen them with the compressor on the bottom also.

I like the alternator having it's own belt though incase the clutch on the compressor seizes or something.
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post #8 of (permalink) Old 02-28-2005, 09:36 AM
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Re: 1981 CJ with A/C belt routing

Good point, John. Mine seized last fall and would have had me in trouble had I been running a serpentine setup. Funny how running a York with out oil can cause a problem. [img]images/graemlins/tongue.gif[/img] [img]images/graemlins/codger.gif[/img]
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post #9 of (permalink) Old 02-28-2005, 09:55 AM
 
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Re: 1981 CJ with A/C belt routing

[ QUOTE ]
I like the alternator having it's own belt though incase the clutch on the compressor seizes or something.

[/ QUOTE ]

That is a good point,,, how ever,,,
Things to ponder [img]images/graemlins/wink.gif[/img]

The pulley bearing is the part that will freeze up and cause the belt problems in most cases.
When the clutch does go bad, ( usually a bad wire conn. or a weak clutch magnet) if you have the clutch removal tool, (Auto zone about $6.00) and a 1/2" wrench takes about 10 min to pull it. [img]images/graemlins/grin.gif[/img]

Now for more things to ponder: with the belt located like the second picture the pulley on the York is a smaller diamiter than the harmonic pulley, (usually) that means I should be able to get a faster rotation on my alternator right? [img]images/graemlins/grin.gif[/img]

This could be good or bad, you think. [img]images/graemlins/thumbsup.gif[/img]
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post #10 of (permalink) Old 02-28-2005, 11:22 AM Thread Starter
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Re: 1981 CJ with A/C belt routing

[ QUOTE ]
Yep, that's how a 3 belt system is routed,

[/ QUOTE ]

Thanks Mr6er, was hoping that someone had seen this setup before. [img]images/graemlins/cool.gif[/img]

[ QUOTE ]
I like the alternator having it's own belt though incase the clutch on the compressor seizes or something.

[/ QUOTE ]

Was thinking that too John.

[ QUOTE ]
Mine seized last fall and would have had me in trouble had I been running a serpentine setup.

[/ QUOTE ]

Yep you would have Tom, I was there when it happened. It's that darn Haspin Mud. Seem to remember not being able to pump up those ARBs was a bit of a problem too (We won't talk about the tire). Just wasn't Tom's day.

[ QUOTE ]
The pulley bearing is the part that will freeze up and cause the belt problems in most cases.
When the clutch does go bad, ( usually a bad wire conn. or a weak clutch magnet) if you have the clutch removal tool, (Auto zone about $6.00) and a 1/2" wrench takes about 10 min to pull it.

[/ QUOTE ]

Yep, but if nothing else is powered by that belt it becomes simple (unless you have ARBs front and rear).

[ QUOTE ]
Now for more things to ponder: with the belt located like the second picture the pulley on the York is a smaller diameter than the harmonic pulley, (usually) that means I should be able to get a faster rotation on my alternator right?

[/ QUOTE ]

My setup has ~6" compressor pulley and the crank pulley is ~7" so the compressor is running a little faster than motor RPM. No danger of exceding the 6000 RPM York spec.

Not sure that John has the same compressor but if it is it would be running 1:1, both ~6" pulley. So the alternator would be running slightly slower than my setup with ~7" crank pulley (but the same as every other CJ I can think of).

If the compressor pulley is smaller it is running faster than motor RPM but the ratio to the alternator is different and likely brings the alternator speed back to being about the same.

Clear as mud... I might not have said that well. But since I will be running the compressor a bit faster I'm hoping that it will be better able to keep up with air demand even when the motor is at idle. Also will be changing from ~6" pulley driving the alternator to ~7" making it run a bit faster. I like to set my idle at 550 RPM and it's not seen 4000 RPM in years (if ever), but strange as it seems the darn thing was hitting 3600 to 3800 RPM yesterday on some of the muddy hills (didn't even blow up).

Thanks GP'n

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