Volvo 740 1993 User Manual
VOLVO AC R134 refit kit instructions for the 700 series
j
Page 1 of 18ACconvert
FAQ Home
Volvo Maintenance FAQ
for 7xx/9xx/90 Cars
CFC-Free A/C Retrofit Kit for Pre-1993 Volvos
Introduction; Kit Contents: Page 1
Written by Dave Urban. Caution: This information is giving
for purely information only. No Warrantee is either given or
implied. Only people who have the correct equipment should
perform this task.
Years ahead of legislation, Volvo first introduced CFC-free air conditioning on all of its U.S.
and Canadian 1993 model cars.
With the public's increasing concern about the environment, Volvo released a retrofit kit for
older model Volvos in the spring of 1993. The kit allowed Volvos with existing R12 freon
based air conditioning systems to be converted to use a CFC-free refrigerant. Volvo was the
first automobile manufacturer in the world to offer such a conversion kit for older model
cars.
When I purchased my kit from my local dealer, I was shocked to find that it did not include
any type of instructions. They were kind enough to fax it to me. This is a web version of the
instructions that I received. I have added some of my own comments in italics. This is not a
ob for the weekend mechanic . It does require special tools. Some of those tools can be used
at the shop then the work done at the house.
[Editor] When the instructions mention "torque joint to 12 Nm" this means to tighten until
snug. Don't overtighten: the seal is made by the o-ring, not the threads. Lubricate the o-ring
before installation with compressor oil; use a backup wrench on all fittings; and test with
soap solution (which will bubble in the presence of a leak) after
Supplementary Kit 1, mainly for cars not equipped
z with,factory-fitted valve,
z with pipes or where pipe has
z been removed as a service fix
Supplementary Kit 2
z Shaft seal kit for cars equipped with Sandan Compressor
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N
Page 2 of 18ACconvert
Replaces
9145664-
0
740/940 9145660-8 9145661-6 9134032-3 9134344-
B23F - * - - - -
B230F -92 * - * - -
D24T -87 * - * * -
B234F - * - * - -
B230FT 940SE
- * - - -
USA
Turbo
1991
The basic kit comes with
9134345-
2 (SD-
510/508)
9 (SD-
709)
z New receiver/Dryer
z R134a filler valve
z Ester Oil
z O-rings
z R12 Filler permanent Caps
z Circlip
z Kit costs: 9145660-8 - $57.00
z Supplement #1 - $30.00
Go to: Page 1 2 3 4 5 6 7 8 9 10
Volvo Maintenance FAQ for 7xx/9xx/90
Cars
Contents of basic and supplementary kits from R12 to R134a
ote that both the basic and supplementary kits can have different part numbers. Some of the basic kits
6/27/2007http://oak.cats.ohiou.edu/~ridgely/retrokit/ac_convert.htm
may have different supplementary kits.
Use these pages a guidelines for the conversion of the A/C system
Page 3 of 18ACconvert
Basic Kit
9145660-8
The illustration
shows a car with
the pipe runs and
the factory filling
valve installed.
My car did not
have this and
need Sup kit#1.
The basic kit has
the new quick
release valve that
the R134a uses.
This illustration
shows a car not
equipped with
the factory filling
valve. This can
also occur if the
A/C was
installed as an
accessory.
In this case a
Supplementary
kit, PN 91340323 is also required
which replaces
the pipe shown
in the upper part
of the
illustration.
Exception 1:
Requires in
addition
Supplementary
kit (2) PN
9134344-2 for
following models
6/27/2007http://oak.cats.ohiou.edu/~ridgely/retrokit/ac_convert.htm
740/760 1987 Engine
D24T
Exception
2:Requires in
addition
Supplementary
kit(2) 9134345-9
for following
models:
780 1988 Engine B280F
Page 4 of 18ACconvert
Conversion of A/C system form R12 to R134a Retrofit: Page 3
The method described below is for installing Basic kit PN 9145660-8. This is, in principle, the basic
method for installing Basic PN 9145661-1 or supplementary kits according to the first two pages.
Empty refrigerant from System
This MUST be done by a licensed AC technician. The free release of freon R12 is a federal offense.
Most places should do this for a small fee. This also helps remove the oil and the freon trapped in the oil
that could cause problems later on because of the incompatibility between the two type of freon.
A1
Remove:
z Battery
negative
cable
z Receiver
A2
Use rust inhibitor
PN 1161422-9 on
all screw joints
which are to be
detached
Allow the
6/27/2007http://oak.cats.ohiou.edu/~ridgely/retrokit/ac_convert.htm
inhibitor several
minutes to work
before undoing
screwed joints.
NEVER USE
EXCESSIVE
FORCE
Note: Under no
circumstances
use heat when
removing
I didn't do this
step and all went
fine. I would say
this is
precautionary but
not fully
necessary
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A3
Detach:
z ETF/KRU
valve
bracket.
Remove
circlip and
valve
(where
installed)
z pipe
connections
at the
receiver
inlet and
outlet. Be
sure to use
two
wrenches
when
undoing
connections
so not to
twist
lightweight
6/27/2007http://oak.cats.ohiou.edu/~ridgely/retrokit/ac_convert.htm
metal.
z the
pressostat
connector.
Remove
pressostat:
this will be
reused.
This is the
low
pressure
cutoff
switch. If
defective
you can
purchase
one at the
local parts
store for
about $12.
z Existing O
rings (note
sizes)
Replace
with new
rings from
kit on new
equipment.
Page 6 of 18ACconvert
A4
Remove screws
holding the
receiver clamp
A5
Lift out Receiver
Conversion of A/C system form R12 to R134a Retrofit: Page 4
Remark:On older cars or
cars where the A/C
system was installed as
an accessory, there is no
EFT/KRU valve
In this case remove the
6/27/2007http://oak.cats.ohiou.edu/~ridgely/retrokit/ac_convert.htm
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