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  Topic Review (Newest First)
08-10-2015 08:11 PM
bobgto I found that the new compressor had 8 ounces of oil in it?? The label on the compressor said to add oil and not to drain oil that was shipped with compressor. I guess someone at the factory made a mistake. I drained it all and added 4 Oz of new oil.
08-05-2015 10:19 PM
muddflow
Quote:
Originally Posted by bobgto View Post
Thank You Muddflow!

I've only used A/C a few times, when it was working.

I wrote down a few notes to attempt to work on AC. Then decided to remove the compressor to free up space for filters and other equipment. Kept the condenser installed to protect the radiator from rocks, debris, etc.
08-05-2015 08:32 PM
bobgto Thank You Muddflow!
08-04-2015 04:26 PM
muddflow Cherokee specifications for 98 XJ.
-----------------------------------
Oil/Onces - 8.1
R-134a / Ounces - 20.0

Compressor belt tension
--------------------------
New - 180-200 lbs.
Used - 140-160 lbs.

System Operating Pressures
------------------------------
High Side - 200-260 PSI
Low Side - 32-41 PSI

___________ misc. notes

Polyalkylene Glycol (PAG) ND-8, SUN PAG 56, SP-20
PAG oil absorbs moisture very rapidly, 2.3-5.6 percent by weight compared to R-12's mineral oil absorption rate of .005 percent.
Never exceed A/C system refrigerant oil capacity when servicing

Always use new gasket or "O" ring when connecting lines or fittings, Coat "O" ring with refrig. oil. Use two wrenches and keep oil off fitting threads. Long term contact of oil on threads may cause future damage to threads.

Sanden SD-7H15 7-Clyinder oil capacities (ounces)

Accumulator ______ 4.0
Compressor _______ (* same amount as old compressor)
Condenser_________ 1.0
Evaporator ________ 2.0
Refrigerant Line_____ 1.0
System Total _______ 8.1

* Drain and measure oil from old compressor. Drain new oil from replacement compressor and save. Using new refrigerant oil drained from new compressor, add the same amount drained from old compressor.

If replacing A/C components, add specified amounts of refrigerant oil to each component.

A/C systems normally will not need additional refrigerant oil unless oil loss has occurred due to ruptured lines, leaking compressor seals, compressor overhaul or component replacement.

Never use R-134a in in-combination with compresses air for leak testing.

All R-134a based A/C systems use 1/2" - 16 ACME thread fittings (square threads) and quick-connect service ports
08-03-2015 08:31 PM
bobgto I blew out evaporator and condenser out with nitrogen. But It seemed that there was still oil/dye in the condenser. From talking to people, it seems that the rebuilt compressors have issues.
07-31-2015 03:21 PM
CCKen
Quote:
Originally Posted by bobgto View Post
When I originally installed the first compressor, I replaced the accumulator/drier and orifi's .Also flushed the system as best as I could. But I only added 4 oz of oil. Maybe that is the problem,there was not enough oil??? But I guess you never get all the oil out, some stays in the condenser. And my point being is when I took this last compressor off there was dye in the oil. I have not used dye with any of these compressor changes,but I did use it 10 years ago when I changed out the evaporator.So flushing did not get the dye out and probably some oil.
Did you flush the evaporator and the condenser and blow them out with compressed air? Generally that's the protocol when replacing all of those components you mentioned.

I replaced everything in my system except the evaporator. When I did, I flushed the evaporator, blew it out, the added 4 ounces of PAG 100 (with dye) to the accumulator and 4 ounces to the compressor. Took the Heep to an auto AC shop and had it serviced. First time I've had COLD air-conditioning in five years.
07-31-2015 02:56 PM
bobgto When I originally installed the first compressor, I replaced the accumulator/drier and orifi's .Also flushed the system as best as I could. But I only added 4 oz of oil. Maybe that is the problem,there was not enough oil??? But I guess you never get all the oil out, some stays in the condenser. And my point being is when I took this last compressor off there was dye in the oil. I have not used dye with any of these compressor changes,but I did use it 10 years ago when I changed out the evaporator.So flushing did not get the dye out and probably some oil.
07-29-2015 11:18 AM
CCKen
Quote:
Originally Posted by bobgto View Post
The Napa guy said 8 oz and I looked it up on line and found that it said 8 oz pag 100 also.
The entire system holds 8.1 ounces, not the compressor.

Before servicing a new/rebuilt compressor, drain all the oil out of it then add the 4 ounces of PAG100.
07-29-2015 10:06 AM
bobgto The Napa guy said 8 oz and I looked it up on line and found that it said 8 oz pag 100 also.
07-29-2015 06:00 AM
CCKen 4 oz. and PAG100 is correct.
07-29-2015 05:03 AM
SemperFiGuy Should be amount and type right on the comp itself where the nameplate sticker is. Each one is different based upon manufacturer.
07-28-2015 07:42 PM
bobgto No responses? Did I do something wrong???
07-27-2015 07:35 PM
bobgto
AC Compressor Oil/amount

What is the oil amount/type on Ac compressor for a 98 4.0.? I believe 4 oz and Pag 100. Not having much luck with these napa rebuild compressors. just removed the 2nd compressor in 2 1/2 years. The front seal leaked on both of them. First one lasted 2 years and 2nd 4 months. Followed directions for getting the front seal oiled. Going with a brand new one now.

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