Pontiac FIREBIRD 1972 Service Manual page 470

5C-10 1972 PONTIAC SERVICE MANUAL
FRONT PLATE
ALVE PLUNGER
REAR DIAPHRAGM
Fig. 5C-7 Diaphragms, Plates, Retainer a n d Plunger
securely in vise (see Fig. 5C-6 inset). Leave just
enough space between steel retainer on plastic valve
hub and side of vise jaw to insert two medium-sized
open end wrenches. Use wrench nearest vise as a pry
to force the valve plunger grommet (and power sec-
tion) off the ball end of the valve rod.
4. Remove valve rod from vise. Carefully remove hub
protector, valve return spring, poppet retainer and
poppet.
POWER SECTION
DISASSEMBLE (Fig. 5C-7)
NOTE: Special tool BT 7 1 K 1 4 or J 23456 (Fig.
5C-8) may be used for housing disassembly as
an option to the following method:
1. Assemble special tool combination as shown in Fig.
5C-9.
2. Place assembly in arbor press (Fig. 5C- 10) with rear
shell and spanner wrenches up. Secure tool J 8433 to
press to prevent tilting of front shell.
NOTE: On some models it will be necessary to
pry open the four tangs located at the seam, to
all0 w shell separation.
CAUTION: Do not compress assembly to the
point of damaging power unit.
3. Compress assembly sufficiently enough to allow rota-
tion of tools J 9504.
*
4. Scribe a mark across front and rear shell to facilitate
ass~mbly.
WARNING: DIAPHRAGM RETURN SPRING IS
UNDER PRESSURE. USE CARE IN SEPARATING
SHELLS TO AVOID THE SPRING FLYING OUT.