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AIR C O N D IT IO N IN G 1A-16

N orm ally, air conditioning system s are charged m aking use

o f the J-8393 Charging S tatio n w hich uses the 30 lb-container.

Evacuating and Charging P rocedures are n o te d later in this
section.

The

15 oz. disposable cans are generally used for

m iscellaneous o p erations such as flushing.

COMPRESSOR O IL

Special refrigeration lub rican t should be used in the system .

This  oil  is  as  free  fro m   m oisture  and  contam inants  as  it  is
possible  to   attain   by  h u m a n   processes.  This  co n d itio n   should
be  preserved  b y   im m ediately  capping  th e  b o ttle  w hen  n o t  in
use.

See “ Air C onditioning S ystem C apacities” for the to ta l

system oil capacity.

INSPECTION AND

P R E -D E LIVE R Y INSPECTION

1. C heck th a t engine exhaust is suitably ventilated.

2. C heck th e belt for p ro p er tension.
3. W ith controls positioned for operation o f the system ,

o p erate  the  unit  for  ten  m inutes  at  approxim ately  2000
rpm .  O bserve  the  clu tch   pulley  b o lt  to  see  th a t  the
com pressor  is  operating  a t  th e  same  speed  as  th e  clutch
pulley. A ny  speed variation  indicates  clutch  slippage.

4. B efore tu rn in g o ff th e engine, check the sight glass to see

th a t  th e u n it has a  sufficient  R efrigerant  charge.  The  glass
should  be  clear,  alth o u g h   during  m ilder  w eather  it  m ay
show   traces  o f  bubbles.  F o am  in  the  flow  indicates  a low

charge. N o liquid visible and n o tem p eratu re differential
betw een com pressor inlet and o u tle t lines, indicates no
charge.

5. C heck refrigerant hose connections:

" O " ring Connections

— Check to rq u e o f fittings as

ch a rted la ter in this section u nder “ R efrigerant Line

C onnections;” reto rq u e if required. L eak test the
com plete system .

Hose Clamp Connections

— I f clam p screw to rq u e is less

th a n   10  in.  lbs.,  retig h ten   to   20-25  in. lbs.  D o  n o t tighten
to   new   hose  specifications  o r  hose  leakage  m ay  occur.
L eak te st  th e  com plete  system .

6. I f there is evidence o f an oil leak, check th e com pressor

to see th a t th e oil charge is satisfactory.

N O T E : A slight am ount o f oil leakage at the

compressor fro n t seal is considered normal.

7. C heck the system con tro ls for p roper operation.

Due to the p orosity o f th e refrigerant hoses and connec

tions, th e system refrigerant level will show a definite drop

a fte r a period o f tim e. Since th e com pressor oil is carried

th ro u g h o u t the entire system m ixed w ith th e refrigerant, a low
refrigerant level will cause a dangerous lack o f lubrication.

T herefore th e refrigerant charge in the system has a definite

tie-in w ith th e am o u n t o f oil fo u n d in th e com pressor and an

insufficient charge m ay eventually lead to an oil build-up in

the evaporator.

COMPRESSOR SER IA L NUMBER

The com pressor serial num ber is located on th e serial

num ber  plate  on  to p   o f   th e  com pressor.  The  serial  num ber
consists  o f  a  series  o f num bers  and  letters.  This  serial  num ber
should  be  referenced  on  all  form s  and  correspondence related
to   th e  servicing  o f this  part.

PERIODIC SERVICE

6000 M ILE INSPECTION

1. C heck u n it fo r any indication o f a refrigerant leak.

2. I f there is an in dication o f an oil leak, check the

com pressor for p roper oil charge.

N O T E : A slight am ount o f oil leakage at the

compressor fro n t seal is considered normal.

3. C heck sight glass for proper charge o f R efrigerant-12.

4. T ighten th e com pressor brace and su p p o rt b o lts and

check the b elt tension.

5. C heck refrigerant hose connections as in S tep 5 o f

“ Pre-Delivery In sp ectio n .”