Bi-Level Boost Switch - Pontiac FIREBIRD 1972 Service Manual

1B-58 1972 PONTIAC SERVICE MANUAL
MOTOR
-
REMOVE AND REPLACE
Follow procedure for programmer wheel removal
and gear inspection.
Remove motor by moving it back and up from its
normal position.
Unsolder orange lead to motor from circuit board
and solder orange lead from new motor to same
point. Transfer green motor wire in same manner. Be
sure to use resin core solder.
Install new motor making certain that worm gear is
properly seated in its bearing block and properly
meshed with helical spur gear.
Reassemble unit by reversing disassembly procedure.
When reinstalling programmer wheel, follow special
instructions provided below.
PROGRAMMER WHEEL
-
REPLACE
1 . Position vacuum valve approximately in center of its
travel.
I
ALIGN PEG
O F
,
Z .
Install programmer wheel so that peg on vacuum
valve is visible through alignment hole in wheel (Fig.
1B-65). It may be necessary to move the vacuum
valve slightly to accomplish this.
Install potentiometer clip and rotate so that scribe
marks (made previously) on programmer wheel and
clip line up. Tighten retaining screw on programmer
wheel hub.
Slip the round circuit board off of wheel and check
to be certain that four ball bearings are still in their
proper positions in bearing retainer cups. Replace
board and reinstall finger block with two screws.
POWER RESISTOR
-
REMOVE AND REPLACE
1.
Remove cover plate on lower side of programmer.
2. Unsolder green and orange lead.
3. Install new resistor board and solder leads.
4. Replace cover plate.
BI-LEVEL BOOST SWITCH
G SERIES
-
REMOVE AND REPLACE
1. Remove cold air duct (except models with console).
2. Check both switches for operation.
3. Remove gasket seal.
4. Remove defective switch or switches.
5. To replace, reverse removal procedure.
Fig. 18-65 Aligning Vacuum Valve With Track In
Programmer Wheel