Chevrolet 1977 light duty truck Service Manual page 47

G e n e ra l D e sc rip tio n .......................................................... IB-2
Four-Season System (C-K M odels)........................... IB-2
C60 System (G M odels)............................................... IB-2
Overhead Systems (C-K-G M o d e ls)......................... IB-2
M otor Home Chassis S y stem ...................................... IB-2
Basic Air C o n d itio n e r ................................................... IB-2
M ain Units o f the S y s te m .......................................... IB-5
System C o n tro l...............................................................
D ia g n o s is ............................................................................ IB-16
R efrig eran t S y s te m ....................................................... IB -16
Compressor D ia g n o sis.................................................
Vacuum System D ia g n o sis......................................... IB-17
Insufficient C o o lin g ....................................................... IB -19
Electrical System D ia g n o sis....................................... IB-21
Air C onditioning System C a p a c ity ......................... IB -17
Perform ance T e s t .......................................................... IB-17
Perform ance D a t a ......................................................... IB-30
Checking O il.................................................................... IB-30
R efrig eran t Quick-Check P ro ced u re....................... IB-32
On Vehicle Service.......................................................... IB-33
Thermostatic Switch...................................................... IB-33
Potentiometer (G M o d e ls )......................................... IB-33
Expansion V a lv e ............................................................ IB-34
Engine Idle C om p en sato r........................................... IB-34
C o m p resso r....................................................................... IB-35
Four Season S y stem -C -K M o d e ls.......................... IB-36
C o n d e n s e r......................................................................... IB-36
A c c u m u la to r..................................................................... IB-37
Blower Assembly............................................................ IB-37
E vaporator C o r e ............................................................ IB-37
Expansion T u b e ............................................................. IB-38
Selector Duct and Heater C o re ............................... IB-38
Kick Panel Air Valve................................................... IB-39
Plenum Air V a l v e ......................................................... IB-39
Control A sse m b ly .......................................................... 1B-39
T em p eratu re D oor Cable A d ju s tm e n t................ IB-40
M aster Switch a n d / o r Blower S w itch................... IB-40
V acuum T a n k .................................................................. IB-40
Blower Resistor U n i t .................................................... IB-41
T herm ostatic Switch...................................................... IB-41
D ischarge Pressure S w itc h ......................................... IB-41
F u s e ..................................................................................... IB-42
O verhead System--C-K M odels................................ IB-42
R e a r D u c t......................................................................... IB-42
Blower M otor R esistor................................................
Blower M otor A sse m b ly ............................................. IB-42
Expansion V a lv e ............................................................ IB-44
SECTION IB
AIR CONDITIONING
C O N T E N T S
Evaporator C o r e ............................................................
Blower Motor Switch...................................................
Fuse..................................................................................... IB-45
C60 S y s te m - G M o d els...............................................
C o n d e n se r.........................................................................
R eceiv er-D eh y d rato r....................................................
Sight Glass Replacem ent............................................
I B-12 A /C Air Distributor D u c t ......................................... IB-46
A /C Center and Right Dash O utlets...................
Heater, A ir D istributor and Extension Ducts.. IB-48
IB -16 Heater Core Case and C o r e ....................................
Expansion V a lv e ............................................................ IB-48
Blower M o to r.................................................................. IB-48
Evaporator C o r e ............................................................ IB-49
Air Inlet V alve...............................................................
Temperature D oor C a b l e ........................................... 1B-49
C o n tr o l.............................................................................. 1 B-49
Blower Switch................................................................. IB-50
Amplifier Circuit B o a rd .............................................. IB-50
Resistors............................................................................ IB-50
Blower Motor R e la y .................................................... IB-50
Resistors............................................................................
Blower Motor R e la y .... ................................................ IB-50
Discharge Pressure S w itc h ......................................... IB-50
Vacuum T a n k .................................................................
Circuit Breaker...............................................................
Overhead S y s te m - G Models....................................
Blower-Evaporator S h r o u d ........................................
Blower M otor A ssem blies...........................................
Expansion Valves...........................................................
Evaporator C o r e ............................................................
Resistor..............................................................................
Blower Sw itch.................................................................
Rear Blower Relay........................................................ IB-54
Tie Relay..........................................................................
Dash M ounted S y ste m -M o to r Home U n i t s ......
C o n d e n s e r......................................................................... IB-54
R e c e iv e r-D eh y d ra to r.................................................... IB-55
Sight G la ss....................................................................... IB-55
Blower-Evaporator A ssem bly....................................
Blower Assembly............................................................
Expansion Valve, Evaporator Case or C o r e ...... 1B-56
Thermostatic a n d / o r Blower S w itches.................. IB-57
Resistor.............................................................................. IB-57
IB-42 Fuse..................................................................................... IB-57
Specifications......................................................................1B-57
Special Tools........................................................................IB-58
1B-44
IB-45
IB-45
IB-45
1B-45
IB-46
IB-47
IB-48
IB-49
IB-50
IB-51
IB-51
IB-51
1B-51
1 B-51
IB-52
1B-53
IB-54
IB-54
IB-54
IB-54
IB-55
IB-56