![background image](http://html1.mh-extra.com/html/gmc/s-series-1994/s-series-1994_repair-manual_2235929038.webp)
1 - R E D I N S U L A T O R
2 - H I G H P R E S S U R E
C U T O F F S W I T C H
l
' J
3 - " 0 " R I N G
4 - S W I T C H
R E T A I N I N G
R I N G
’ o
520041-1D1
Fig. 30 High Pressure Cut-Off Switch and Retainer
□
Install or Connect
1.
Check sw itch cavity and O -ring groove in the rear head
for dirt or foreign m aterial and clean as necessary. Install
new O -ring coated with clean 525 viscosity refrigerant
oil into groove in sw itch cavity.
2.
Lubricate the sw itch housing with clean 525 viscosity
refrigerant oil and carefully insert switch into switch
cavity until switch bottom s in cavity.
3.
U sing J 5403 snap ring pliers, install switch retaining
ring with high point o f curved sides adjacent to the
sw itch housing. Be sure retaining ring is properly seated
in the sw itch cavity retainer ring groove.
COMPRESSOR LEAK TESTING
(EXTERNAL AND INTERNAL)
Bench-Check Procedure
1.
Install Test Plate J 9 6 2 5 -A on Rear Head o f compressor.
2.
Using J 3 8 1 0 0 -B R efrigerant Recovery System , attach
center hose o f m anifold gage set on charging station to a
refrigerant drum standing in an upright position.
3.
C onnect Charging Station high and low pressure lines to
corresponding fittings on Test Plate J 9 6 2 5 -A , using J
5420 G age A dapters if hoses are not equipped with valve
depressors.
•
Suction port (low -side) o f com pressor has large
internal opening. D ischarge port (hi-side) has
sm aller internal opening into com pressor.
4.
O pen low -pressure control, high-pressure control and
refrigerant control on Charging Station to allow
refrigerant vapor to flow into com pressor.
5.
Using a leak D etector, check for leaks at Pressure Relief
Valve, com pressor shell to cylinder, com pressor front
head seal, and com pressor Shaft Seal. A fter checking,
shut o ff low pressure control and high pressure control on
C harging Station.
6.
If an external leak is present, perform the necessary
corrective m easures and recheck for leaks to make
certain the leak has been corrected.
7.
R ecover the R efrigerant.
8.
D isconnect both Gage A dapters J 5420 from the Test
Plate J 9 6 2 5 -A .
9.
Add 90 ml (3 oz.) new 525 viscosity refrigerant oil to the
com pressor assem bly. Rotate the com plete com pressor
assem bly (not the crankshaft or drive plate hub) slow ly
several turns to distribute oil to all cylinder and piston
areas.
10.
Install a M9 x 1.25 threaded nut on the com pressor
crankshaft if the drive plate and clutch assem bly are not
installed.
11.
Using a box-end w rench or socket and handle, rotate the
com pressor crankshaft or clutch drive plate on the
crankshaft several turns to ensure piston assem bly to
cylinder wall lubrication.
12.
C onnect the Charging Station high pressure line or a high
pressure gage and G age A dapter J 5420 to the Test Plate J
9 6 2 5 -A high side connector.
13.
Attach an A dapter J 5420 to the suction or low pressure
port o f the Test Plate J 9 6 2 5 -A to open the Schrader-type
valve.
Oil will drain out o f the com pressor suction port adapter
if the com pressor is positioned with the suction port
dow nw ard.
14.
A ttach
the
com pressor to
the
H olding
Fixture
J 2 5 0 0 8 -A using m etric m ounting screws. Clam p the
com pressor H olding Fixture in a vise so that the
com pressor can be m anually turned with a wrench.
15.
Using a w rench, rotate the com pressor crankshaft or
drive plate hub ten (10) com plete revolutions at a speed
of approxim ately one-revolution per second.
Turning the com pressor at less than one-revolution per
second can result in a low er p u m p -u p pressure and
disqualify a good pum ping com pressor.
16.
O bserve the reading on HIGH pressure gage at the
com pletion o f the tenth (10th) revolution o f the
com pressor. The pressure reading for a good pum ping
com pressor should be 344.75 kPa (50 p.s.i.) or above. A
pressure reading o f less than 310.275 kPa (45 p.s.i.)
w ould indicate one or m ore suction and/or discharge
valves leaking, an internal leak or an inoperative valve.
The
refrigerant
m ust
be
recovered,
com pressor
disassem bled and checked for cause o f leak. R epair as
needed, reassem ble and repeat the pum p-up test.
Externally leak test.
17.
W hen the pressure pum p-up test is com pleted, recover
refrigerant from the HIG H side and rem ove the G age
A dapters J 5420 and Test Plate J 962 5 -A .
18.
On the H R 100T /H R 110-M D com pressor, tilt the
com pressor so that the com pressor suction and discharge
ports are dow n. Drain the oil from the com pressor.
19.
A llow the com pressor to drain for 10 m inutes, then
charge w ith the proper am ount of oil. T he oil may be
poured into the suction port.
If further assem bly or processing is required, a shipping
plate or Test Plate J 9 6 2 5 -A should be installed to keep
out air, dirt and m oisture until the com pressor is
installed.
Summary of Contents for S Series 1994
Page 1: ......
Page 11: ...VIEW A p n n n j VIEW C F7554 Figure 10 Hydra Matic 4L60 E Transmission I D Location...
Page 24: ...NOTES...
Page 26: ......
Page 69: ...NOTES...
Page 71: ...3 2 STEERING...
Page 73: ......
Page 84: ......
Page 102: ...40...
Page 130: ...NOTES...
Page 146: ...NOTES...
Page 162: ...NOTES...
Page 166: ...Figure 5 Removing the Pinion Flange Figure 6 Pressing the Drive Pinion from the Cage...
Page 178: ...Figure 3 Spreading the Differential Case Figure 4 Removing the Differential...
Page 190: ...NOTES...
Page 202: ...NOTES...
Page 206: ...F5785...
Page 212: ...B Button Moved Out of Bearing Bore F5791...
Page 228: ...NOTES...
Page 232: ......
Page 234: ......
Page 236: ...Adjuster 63 Bolt 64 Lock Figure 10 Turning the Adjuster Plug K3 Models...
Page 237: ...Figure 13 Removing the Pinion Seal 39 Bearing Cup Figure 16 Removing the Inner Bearing Cap...
Page 261: ...F7475...
Page 267: ...B Button Moved Out of Bearing Bore F5791...
Page 294: ...NOTES...
Page 300: ...NOTES...
Page 318: ...NOTES...
Page 322: ...SR207LN2 EDS...
Page 324: ......
Page 326: ...OVERHEAD OILING AND RETURN MAIN OIL GALLERY N30005 6A2 J EDS...
Page 368: ...103 153 127 V1200...
Page 370: ......
Page 372: ......
Page 374: ...F9375 Figure 7 Engine Lubrication Diagram Engines Without Balance Shaft...
Page 376: ...Figure 9 Engine Lubrication Diagram Engines With Balance Shaft...
Page 399: ...V2974...
Page 410: ......
Page 412: ...195 196 201 174 252 163 165 164 244 3706r3924...
Page 452: ......
Page 454: ...163 164 V1202...
Page 456: ...20 21x 302 210 4 0 41 2 5 2 5 1 2 51 4 2 e3 54 3 9 252 252 S 255 255 25 6 256 209 V1196...
Page 458: ...100 1 8 4 185 183 177 v 75 201 3706r1204...
Page 460: ......
Page 510: ......
Page 512: ...V2131...
Page 514: ...110 106 106 103 90 93 89 88 87 86 v 7 7 7 7 j A _ 111 f t 2 a a s 53 49 L 47 46 3706r4751...
Page 516: ...259 260 150 237 S lM 180 167180 J 1 82 183 170 169 1 1 78 1 7 9 213212 2 0 7 205 r i 3706r4752...
Page 566: ...NOTES...
Page 574: ...NOTES...
Page 618: ...SPECIAL TOOLS...
Page 620: ...NOTES...
Page 672: ......
Page 682: ......
Page 686: ......
Page 694: ...RH0213 4L60 E...
Page 695: ...657 659 m i J 8092 H J 34196 4 3 34196 5 657 658 665 J 23907 J 7004 1 J 8092 RH0214 4L60 E...
Page 696: ...J 8092 J 34196 4 33 31 J 8092 RH0215 4L60 E...
Page 697: ...SPECIAL TOOLS...
Page 698: ...SPECIAL TOOLS...
Page 758: ...RH0194 4L80 E...
Page 764: ......
Page 770: ...SPECIAL TOOLS...
Page 771: ...SPECIAL TOOLS CONT...
Page 772: ......
Page 775: ......
Page 776: ......
Page 785: ......
Page 804: ...NOTES...
Page 806: ......
Page 808: ......
Page 822: ...3707r5079...
Page 840: ......
Page 848: ...NOTES...
Page 852: ......
Page 860: ...F5435...
Page 866: ......
Page 878: ...F9167...
Page 882: ...16 FrontOutputShaft 18 DrivtQNr 19 DrivenGm t 20 DriveChain 22 FrontOutputBearing V2836...
Page 890: ...F9168...
Page 908: ......
Page 919: ......