GMC S Series 1994 Repair Manual Download

Page: 27 / 919

SECTION 1D1

HR100T/HR110-MD AIR CONDITIONING

COMPRESSOR

NOTICE:

W hen fasteners are rem oved, alw ays reinstall them at the same location from w hich they w ere rem oved. If a

fasten er needs  to  be  replaced,  use  the  correct  part  num ber  fastener  for that  application.  I f the  correct  part  num ber  fastener  is  not
available,  a fastener o f equal  size and  strength  (or stronger)  m ay be  used.  Fasteners that are not reused, and those  requiring thread
locking  com pound  will  be  called  out.  The  correct torque  value  m ust be  used  when  installing  fasteners  that require  it.  If the  above
conditions are  not follow ed,  parts  or system   dam age could result.

CONTENTS

ID 1-1

C om pressor Clutch Coil and/or

1D 1-3

Pulley Rim — 4 Pole & 6 Pole C l u tc h .................1D 1-8

M ajor Repair Procedures

ID 1-3

Com pressor Shaft Seal ...........................................1D 1—10

C om pressor Pressure R elief Valve ..................... 1D 1-12

1D 1—3

C om pressor Control S w itc h e s ...............................1D 1-12
C om pressor Leak Testing

1D 1—5"

(External and I n te r n a l ) ...........................................1 D 1-12

C om pressor O verhaul

1D 1-6

Special Tools ........................................................... 1D 1-14

GENERAL DESCRIPTION

Vehicles using the H R 100T and H R 110-M D air

conditioning  com pressor  m ay  have  differences  betw een
installations  in their m ounting  brackets, drive system s, pulleys,
connector  assem blies  and  system   capacities,  none  of  w hich
w ill  affect the follow ing  O verhaul  Procedures.

T here are tw o (2) com pressor clutch driver designs

w hich  will  affect  the  overhaul  procedure  to  be  used.  The  four
(4)  pole  clutch  (Fig.  1)  and  the  6  pole  clutch  (Fig.  3)  m ust  be
identified prior to  starting  overhaul  procedure.

W hen servicing the com pressor, it is essential that steps

be taken to prevent dirt or foreign m aterial from getting on or

into the com pressor parts and system during disassem bly or

reassem bly. C lean tools and clean  work area are  very im portant
for  proper  service.  The  com pressor  connection  areas  and  the
ex terio r  o f  the  com pressor  should  be  cleaned  off  as  m uch  as
possible  prior  to  any  “on-vehicle”  repairs  or  rem oval  o f  the

com pressor  for  w orkbench  service.  The  parts  m ust  be  kept
clean  at  all  tim es  and  any  parts  to  be  reassem bled  should  be
cleaned  w ith  trichloroethane,  naphtha,  Stoddard  solvent,
kerosene  or  equivalent  solvent  and  blow n  dry  with  dry  air.
W hen  necessary  to  use  a  cloth  on  any  part,  it  should  be  o f a
non-lint producing type.

The operations described in this m anual are based on

b ench overhaul w ith the com pressor rem oved from the vehicle.

H ow ever, som e service operations depending on

accessibility  o f  the  com pressor,  m ay  be  perform ed  w ithout
rem oving  the  com pressor  from   the  vehicle.  T hese  on-vehicle
operations are  also  identified  in this  m anual.

Fig. 1 Compressor, V-Groove Pulley Type with 4 Pole Clutch

and Driver Shown

All replacem ent com pressors will be shipped from

Harrison  with  8  oz.  o f  oil.  W hen  the  com pressor  is  rem oved
from the vehicle for servicing, drain oil  from  both the defective
com pressor and the  new replacem ent com pressor.  M easure the
amount  rem oved  from  the  defective  com pressor:  if less  than  1
oz. (30 ml) is drained from  the old com pressor, add 2 oz. (60 m l)
to  the  new  compressor.  If  m ore  than  1  oz.  (30  m l)  is  drained
from  the  old  com pressor,  add  the  sam e  am ount  to  the  new
compressor.

GMC S Series 1994, Repair Manual

Search results

Summary of Contents for S Series 1994

Reviews:

Related manuals for S Series 1994

Brands by name

Popular brands