REAR SUSPENSION AND DRIVE LINE 4-47
CIRCUIT
BREAKER
\
M
SINGLE
DRIVE AXLE
CONNECTION
PISTO N A IR -SH A FT UNIT
POWER SOURCE
(IGNITION OR
ACCESSORY SWITCH)
I
8
FROM AIR
RESERVOIR
SPEEDOMETER
ADAPTER
WIRING
HARNESS
SWITCH
CONTROL
SWITCH
SOLENOID
F ig . 81 — Piston A ir S h ift System
in harness may be broken. Plug assem bly in w irin g
harness may also be faulty.
Solenoid V a lv e Check
The solenoid va lv e is e n erg ized to supply a ir to shift
the unit into high axle range only. The va lve must have a
good ground connection to veh icle in o r d e r to operate
s a tis fa c to rily . Make certain that ground connection is
sa tis fa c to ry b efo re checking va lve.
D isconnect lead w ire at C and disconnect a ir line lea d
ing to shift unit. Install a ir p ressu re gauge in a ir line
opening in solenoid v a lv e . Apply voltage to solenoid valve
term in a l and o b serve p ressu re gauge reading.
If gauge indication is approxim ately that of r e s e r v o ir
p ressu re, solenoid va lve is sa tisfa cto ry . If gauge in d ica
tion is low o r no p re s s u re , solenoid va lve is faulty.
Piston A ir-Shift Unit Check
If e le c tr ic a l system is s a tisfa cto ry and axle does not
sh ift p ro p e rly , trouble m ay be caused by a faulty shift
unit. D isassem ble and r e p a ir unit as outlined in this
Manual.
Speedom eter A d ap ter Check
The speedom eter adapter is e n erg ized in low axle
range only. The adapter is grounded through speedom
e te r mounting o r speedom eter cable and cable housing.
Make certain that p ro p er ground is presen t b e fo re check
ing adapter.
Disconnect lead w ire at B and connect test lamp to
lead B and veh icle ground. Turn ignition switch on and
o b serve test lamp.
The test lamp should ligh t in low range position o f
con trol switch. Lam p should go out when con trol switch
is in high range position.
If lamp indications a re c o rre c t, cu rren t supply to
adapter is c o rre c t. If lamp indications a re c o r r e c t and
axle shifts p ro p e rly , but speedom eter does not operate
p ro p e rly , rep lace adapter.
If test lamp indications a re not c o rre c t, trouble is in
w irin g harness o r con trol switch.
Piston A ir-Shift Unit
A Piston A ir-S h ift Unit is used with the 23,000 lb.
Eaton Tw o-Speed A x le s , see Figu re 82. This unit is
operated when a supply o f a ir is relea sed into the c y l
inder. The piston tra v e ls downward against a c o m p re s
sion spring, tra n s fe rrin g motion through the push rod and
actuating le v e r to the shift fork , shifting the axle into
" H i ” ratio. Exhaust o f a ir p ressu re fro m the cylin d er
p erm its the piston and spring to return the axle gearin g
to " L o ” ratio.
Removal
1. Bleed a ir fro m shift unit cylin d er and disconnect a ir
line at piston housing c o ver.
2. Rem ove two stud nuts retaining shifting unit and pull
unit fro m d iffe re n tia l c a r r ie r .
3. Rem ove shift fo rk seal and spring.
Disassembly
1. R em ove bolts, lock w ashers, housing c o v e r and
gasket fro m shift unit housing. Drain lubricant.
2. Position housing in v is e as shown in F igu re 83.
3. Rem ove nuts and bolts retaining piston housing c o v e r
to unit. Rem ove piston housing c o v e r and " O ” ring
sea l, rep lace seal w henever c o v e r is rem oved.
CHEVROLET TRUCK SERVICE MANUAL
Содержание 10 Series 1970
Страница 1: ......
Страница 38: ...HEATER AND AIR CONDITIONING 1A 8 CHEVROLET TRUCK SERVICE MANUAL...
Страница 57: ...HEATER AND AIR CONDITIONING 1A 27 Fig 35 Compressor M ountings CHEVROLET TRUCK SERVICE MANUAL...
Страница 75: ...HEATER AND AIR CONDITIONING 1A 45 Fig 65 R oof M ounted System W iring Diagram CHEVROLET TRUCK SERVICE MANUAL...
Страница 78: ......
Страница 101: ...BODY IB 23 s A ADJUSTER SCREW AND LEVER ASSY Fig 5 9 Exploded V iew o f Level Ride Seat CHEVROLET TRUCK SERVICE MANUAL...
Страница 137: ...BODY IB 59 VIEW IN DIRECTION OF ARROW A Fig 137 A u x ilia ry Seat CHEVROLET TRUCK SERVICE MANUAL...
Страница 142: ...CHEVROLET TRUCK SERVICE MANUAL Fig 5 10 30 Series Truck Frame FRAME 2 4...
Страница 145: ...CHEVROLET TRUCK SERVICE MANUAL FRAME 2 7...
Страница 148: ......
Страница 228: ...REAR SUSPENSION AND DRIVE LINE 4 52 I Fig 88 Forward Rear A xle Assembly Exploded V iew CHEVROLET TRUCK SERVICE MANUAL...
Страница 238: ......
Страница 383: ...ENGINE FUEL 6M 19 F ig I t Engine Fuel S p ecial Tools CHEVROLET TRUCK SERVICE MANUAL...
Страница 384: ......
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Страница 432: ...Fig 1 C lu tch Linkage Except P 2 0 4 0 Series...
Страница 433: ...CLUTCHES AND TRANSMISSIONS 7 3 Fig 2 C lutch Linkage Step Van P 20 40 Series CHEVROLET TRUCK SERVICE MANUAL...
Страница 506: ...FUEL TANK AND EXHAUST SYSTEMS 8 8 Fig 10 Vent Lines Cab M ounted Tanks CHEVROLET TRUCK SERVICE MANUAL...
Страница 528: ...Fig 31 T yp ica l Power Steering Hose Routings...
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Страница 566: ...ELECTRICAL BODY AND CHASSIS 12 4 Fig 3 Front Lighting Assemblies CHEVROLET TRUCK SERVICE MANUAL...
Страница 567: ...ELECTRICAL BODY AND CHASSIS 12 5 Fig 4 C learance and Id e n tific a tio n Lamps CHEVROLET TRUCK SERVICE MANUAL...
Страница 568: ...ELECTRICAL BODY AND CHASSIS 12 6 Fig 5 Rear Lighting Composite CHEVROLET TRUCK SERVICE MANUAL...
Страница 597: ...ELECTRICAL BODY AND CHASSIS 12 35 Fig 37 Engine Com partm ent CE M E60 CHEVROLET TRUCK SERVICE MANUAL...
Страница 598: ...ELECTRICAL BODY AND CHASSIS 12 36 TO FRAME i f Fig 38 Engine Com partm ent C D 50 CHEVROLET TRUCK SERVICE MANUAL...
Страница 608: ...ELECTRICAL BODY AND CHASSIS 12 46 Fig 48 Instrument Panel C A40 CE CS ME50 Exc 02 CHEVROLET TRUCK SERVICE MANUAL...
Страница 610: ...ELECTRICAL BODY AND CHASSIS 12 48 Fig 50 Instrument Panel CE M E60 03 13 CHEVROLET TRUCK SERVICE MANUAL...
Страница 614: ...ELECTRICAL BODY AND CHASSIS 12 52 Fig 54 Instrument Panel SA40 50 CHEVROLET TRUCK SERVICE MANUAL...
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Страница 649: ...SPECIFICATIONS 9 ENGINE SECTION 6 CHEVROLET TRUCK SERVICE MANUAL...
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