A.I.R. Pump - Noisy
Number: 84-206Section: 6 (VI)
Date: Oct., 1984
Subject: LOOSE A.I.R. PUMP PULLEY ATTACHING BOLTS
Model and Year: ALL 1984 "C/K/G" TRUCKS EQUIPPED WITH GASOLINE ENGINES
TO: ALL CHEVROLET DEALERS
Some 1984 vehicles have experienced a noisy A.I.R. pump, which may be caused by loose A.I.R. pump pulley attaching bolts. This condition may be corrected by the installation of a new A.I.R. pump, A.I.R. pump pulley, or both as required if damaged, and new bolts and bolt spacers. The new bolts with the spacers must be torqued twice to insure proper clamp loads on the pulley. A.I.R. pumps used on passenger cars with the same engine applications should not be substituted on trucks because they do not contain the heavy duty assembly designed for truck usage.
PARTS REQUIRED
A.I.R. Pump (Letter After Engine Size is VIN Engine Identification)
Models Part Number
C,K 10,20 (250D, 305H, 350P, 350L) 7842812
G 10,20,30 (250D) 7842812
G,K 20,30 (292T, 350M, 350E) 7843606
C,K 20,30 (454W) 7843607
G 10,20,30 (305H, 305F, 350E, 350L,
350M) 7843607
A.I.R. Pulleys
Models Part Number
C,K 10,22 (250, 292) W A/C 14087012
C,K 10,20,30 (250, 292, 305, 350, 454) 14081703
(Stamped BDC)
G 10,20,30 (250, 305, 350) 14037738
(Stamped BA)
C,K 10,20,30 (305, 350) 14037738
(Stamped BA)
G 10,20,30 (305, 350) Non A/C 14023171
(Stamped AF) 130 mm Dia.
BOLTS 14077183 (10.9 x
17 mm) Quantity 3
SPACERS 120392 (3.15 mm
Thick) Quantity 3
The original pulley stamp must match the replacement pulley stamp. For example: original A.I.R. pulleys on "C/K" trucks that have a "BDC" stamp will be replaced by pulleys that also have a "BDC" stamp.
INSTALLATION
Remove damaged pump and pulley. Remove necessary fittings or valves attached to the pump.
Install fittings or valves on new pump using necessary gaskets or seals for proper attachment to the pump.
Install the new pulley on the pump using the spacers on the the bolts (see illustration). On "G" van models, the pulley must be installed after the pump is installed into the truck due to the large diameter pulley used on 305-350 non A/C application.
NOTICE: Pulley bolt spacers (P/N 120392) must be used or damage to the new pump and pulley may occur.
Tighten the three (3) attaching bolts to 12-15 N-m. Retorque all three (3) bolts to 15-16 N-m using a click type torque wrench or other suitable torque wrench.
NOTICE: The secondary torque procedure must be completed immediately following the initial torque due to the presence of adhesive locking material on the bolt threads.
A.I.R. Pulley:
Install A.I.R. pump belt and tighten to specifications using belt tension gauge J23600 or BT .33-73F.