EMISSION CONTROL SYSTEMS 6T-4
REAR COVER
VEN T HOLE
(D O N O T OIL)
H O U S IN G
FILTER FAN
DRIVE HUB
ROTOR SHAFT
F ig , 4 —A i r In je c tio n Pump
F ig . 5 — D iv e rte r V a lv e (T y p ic a l)
speeds the ex cess a ir is dumped through the p ressu re
r e l i e f va lve which is part o f the d iv e rte r va lve.
The check v a lv e s preven t exhaust gases fro m entering
and damaging the a ir injection pump, as back flow can
occur even under norm al operating conditions.
When p ro p e rly installed and maintained, the A .I.R .
System w ill e ffe c tiv e ly reduce exhaust em ission s. How
e v e r , if any A .L R . component o r any engine component
that operates in conjunction with the A „L R . System should
malfunction, the exhaust em ission s might be increased.
Because o f the relation sh ip between “ Engine Tune Up”
and “ Unburned Exhaust G a ses” , the condition o f the En
gine Tune Up should be checked whenever the A .I.R .
System seem s to be malfunctioning. P a rtic u la r care
should be taken in checking item s that a ffe c t fu e l-a ir
ra tio such as the crankcase ventilation system , the c a r
bu retor and the ca rb u retor a ir clean er.
Because o f the s im ila rity o f many parts, typical illu s
tration s and proced u res a re used except where sp ecific
illu stration s o r proced u res a re n ecessary to c la r ify the
operation.
F ig . 6 —C h e c k in g A .I.R . Pump B elt Tension
MAINTENANCE PROCEDURES
DRIVE BELT
Inspection
•
Inspect d riv e b elt fo r w ear, crack s o r d eterioration
and rep lace if requ ired.
•
Inspect belt tension and adjust if below 75 lbs. using
a strand tension gauge.
Adjustm ent
•
Loosen pump mounting bolt and pump adjustment
bracket bolt.
•
M ove pump until b elt is tight 75 ± 5 lb. used b elt o r
125 ± 5 lb. new b elt using a strand tension gauge)
then tighten adjustment bracket bolt and mounting
bolt (fig . 6).
CAUTION:
Do not p ry on the pump housing.
D istortion o f the housing w ill resu lt in extensive
damage to the A ir Injection Pum p.
Replacem ent
•
Loosen pump mounting bolt and pump adjustment
bracket bolt then swing pump until d riv e b elt may be
rem oved.
•
Install a new d riv e b elt and adjust as outlined above.
OUTLETS
PRESSURE
RELIEF
V A LV E
SIGNAL'
LINE
CO N N ECTIO N
DIVERTED AIR
OUTLET
DIAPHRAGM
ASSEM BLY
CHEVROLET TRUCK SERVICE MANUAL
Содержание 10 Series 1970
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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...
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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...
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Страница 228: ...REAR SUSPENSION AND DRIVE LINE 4 52 I Fig 88 Forward Rear A xle Assembly Exploded V iew CHEVROLET TRUCK SERVICE MANUAL...
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Страница 383: ...ENGINE FUEL 6M 19 F ig I t Engine Fuel S p ecial Tools CHEVROLET TRUCK SERVICE MANUAL...
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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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