A belated thanks to all who replied . Anyway, I had the belt re-installed and with the A.C. operating, I have the same old noise. With the A.C., switched off, I had the same noise.

What do you think: the clutch or the compressor, or both?

My Indy. mech. has an A.C. Precision Parts rebuilt compressor, But
the O.M. plate was removed. The Part number is AS 001796. I emailed them on July 15th., quoting their part number seeking info. on the original type, but I've had no reply ( snet another message to them to-day ).

Assuming this is a perfect fit, what ought to be done before installing it - I mean specifically flushing it out, etc., and filling with mineral oil.

All you valued help appreciated.

Padraig

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1984 300SD TURBO DIESEL

Since the same noise is there with the A/C off (but the pulley turning), I'd say pulley bearing. Not uncommon.

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The Golden Rule

1984 300SD (bought new, sold it in 1988, bought it back 13 yrs. later)

That's what I think,too.

Just musing, I wonder if a new clutch - if I can get one - can be installed without removing and benching the compressor. The reason I ask is if it is possible to do that, then I wouldn't not have the expense of replacing Receiver/Dryer and vacuum system, etc., etc.

Anyone know the answer?

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1984 300SD TURBO DIESEL

There's not much room, but it could be done. The clutch plate comes off, then a circlip?(NOT the inside one for the shaft seal), then use a puller. Because of space, may need the special clutch puller(UL in case):
http://www.amazon.com/gp/product/B0002T5PRW/ref=nosim/102-6371893-9967308?n=228013

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The Golden Rule

1984 300SD (bought new, sold it in 1988, bought it back 13 yrs. later)

Sounds like you have a a/c compressor clutch issue. The HVAC manual shows how to replace it. Tools can be "borrowed" from AutoZone.

Anyway, I replaced the compressor on an '85 300D today that I had installed a new AC Delco compressor on a year ago (r12). The clutch was locked up to the point that the belt would not turn it. The compressor itself turns freely.
I think you have a bad compressor clutch.

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Jim

Just FYI - On my 1983 300SD.
Did not want to recharge whole system just for a clutch bearing.

Did the clutch bearing, and the magnetic coil also.
Did not have to remove anything from the front (no hoses, radiator, oil cooler, etc).

Did need clutch puller, used a two arm puller for magnetic coil.

Used the threaded clutch puller to reinstall coil and pulley.
Made collars for pressing on the parts from PVC tube.

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80 300D 340K Owned 30 yrs
83 300SD 440K Owned 9 yrs - Daily Driver 150mi/day
02 Z71 Suburban 117,000
15 Toyota Prius 2600 miles
00 Harley Sportster 24k
09 Yamaha R6
03 Ninja 250

From what you wrote, it seems a repair kit can be had for the clutch - if so where did you get it?

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1984 300SD TURBO DIESEL

From what you wrote, it seems a repair kit can be had for the clutch - if so where did you get it?

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1984 300SD TURBO DIESEL