BIRD MARK 7 - Page 16

DISASSEMBLY
AND.
REASSEMBLY
INSTRUCTIONS
SECTION
6:
DISASSEMBLY AND REASSEMBLY INSTRUCTIONS
3.10 Remove all plastic grip rings and using
either a %6" nut driver or open end wrench,
remove ail female quick-disconnect fittings from
Centerbody.
3.11 Place the Centerbody in vise with padded
jaws (Fig. 23) and using a 76" open end wrench,
remove the inlet assembly and nylon filter.
3.12 Remove Bird logo and plug as follows:
E Using a thin bladed knife, carefully remove
logo plug from Centerbody.
= With a screwdriver, remove the screw and
nylon washer from Centerbody, directly
behind logo plug.
3.13 Disassembie the rotary valve as follows:
m Using a Vs" alien wrench, loosen the two
(2) setscrews securing the rotary ON/OFF
knob to the valve stem, then remove the knob.
FIGURE 23
m Using a %" open end wrench, remove
spring retainer nut from the rotary valve body.
NOTE: It may be necessary to stabilize the rotary
switch insert with a “Ne” open end wrench to facilitate the
removal of the spring retainer nut.
m Remove the rotary switch insert and spring
from the valve body by gently pulling to
separate the components. x
8 SUPPLEMENT — MARK 7A
To complete disassembly of the Bird MARK 7A, .
add steps 3.14-3.17 to the above Centerbody dis-
assembly — Section 3.0.
3.14 Using a 76° open end wrench, remove the
PRESSURE/TIME CYCLED SELECTOR SWITCH.
3.15 APNEUSTIC FLOWTIME CARTRIDGE
removal and disassembly.
m With a %e” allen wrench, loosen setscrew at
rear of Centerbody and remove APNEUSTIC
FLOWTIME CARTRIDGE.
& With truarc pliers #1, remove external
retaining ring at rear of CARTRIDGE, then
withdraw CARTRIDGE cap, large diaphragm
and cam button.
m Removal of ine small internal retaining ring
is accomplished by using truarc pliers #1.
This will expose the remaining CARTRIDGE
components.
# Using a padded vise (see Fig. 24), secure
CARTRIDGE in place to facilitate removal of
the mounting cap. With a 2" open end
wrench, remove the mounting cap, then the
poppet stem and return spring.
FIGURE 24
3.16 APNEUSTIC FLOWTIME control removal as
follows:
m Use a %2" allen wrench to remove
APNEUSTIC FLOWTIME control knob from
valve.
m Using a %” open end wrench, loosen pack-
ing nut to allow removal of the apneustic valve
from the Centerbody. Remove the valve body
14 一