Click here to make your Home Page

Page Title: Cleaning
Back | Up | Next

Click here for thousands of PDF manuals




Information Categories
.... Administration
Food and Cooking
Nuclear Fundamentals


TM 9-6685-202-14
and spring washer (13). Withdraw the crank wheel shaft
I. Constant Vacuum Regulator, 6605-3065604,
through the top of the housing.
Valve Replacement
(7) To remove the vacuum pump valve stem,
Disassemble only those parts of the constant vacuum
unscrew the integral packing nut and then unscrew the
regulator that are necessary to effect repair or
stem. The asbestos packing (2) may be removed with a
replacement of authorized parts.
(8) Unscrew bushing (22) on the control valve
(1) Do not remove the crank wheel assembly
from the upper housing unless there are broken or
(9) Pry one leg of spider (25) out of the
damaged parts.
groove with a screw driver and remove the spider.
(2) Do not remove bellows unit (35) from
(10) Remove machine screws (23); this will
lower housing (48) unless it is damaged and requires
separate the valve assembly from bellows unit (35).
repair or replacement.  Attempt to extend bellows by
pulling on cross bar (27). If it moves easily, a leak is
(11) Remove four machine screws (47) on
present and the bellows must be reworked or replaced.
valve inlet and tube (34).
(3) Inspect valve disc (30). If seating surface
(12) Withdraw the valve inlet from lower
is scored, repair or replace disc.
housing (48).
(4) Replace packing in vacuum pump valve
(13) To separate bellows unit (35) from lower
(1) with 1/16-inch absestos yarn (2) and a lubricant such
housing in the vacuum -actuated chamber, place a
as vaseline when necessary.
blade of steel approximately 2 in. by 2 in. by 1/8 in.
thick between spacers (32). Be careful not to damage
(5) Replace any gaskets or O-rings which are
the lead pigtail.
not in good condition.
(14) Turn the bellows counterclockwise to
separate bellows unit (35) from lower housing.
The key numbers shown below in
4-13. Cleaning
parenthesis refer to figure 4-11.
Clean all parts that come in contact with mercury as
m. Constant Vacuum Regulator, 6605306-5604,
Perform  the  following  steps  to
a. Remove  mercury  from  the  barometer  in
disassemble  the  constant  vacuum  regulator  for
accordance with paragraph 4-5b.
utilization of authorized replacement parts:
b. Remove the cistern micrometer. Wipe the shaft
(1) On the upper housing, turn crank wheel
with a soft cloth or tissue and blow off lint and dust with
assembly counterclockwise until it bears against internal
clean compressed air. Place the micrometer in a clean,
safe place until time for reassembly.
No further
(2) Remove six machine screws (4) which
cleaning of the micrometer is necessary.
join the upper and lower housing. The O-ring preformed
c. Disassemble the barometer in accordance with
packing (21) should remain in the grooved ring of the
upper housing. Loosen the upper housing.
d. Place all metal parts in a stainless steel or glass
(3) Grasp upper housing (20) and turn it in a
tray containing cleaning compound such as alconoc,
counterclockwise direction.  This will unscrew control
calgonite, oakite, or bonami (FSN 7930-243-5940, 7930-
spring assembly (17) from crossbar (27). Upper housing
5581111, or 7930-999-2417) and hot water.
(20) and lower housing (48) will separate.
e. Using brush FSN 7510-550-8446, scrub the
(4) To remove control spring(l7)from the
parts thoroughly.
upper housing, loosen round head screw (19) in split
locking nut (18) and remove the nut.
f. Using a small brush or pipe cleaner, swab out
connecting passage and screw holes in the base plate.
(5) Turn crank wheel (9) counterclockwise
Brush all screw threads thoroughly.
until the spring assembly is free of the housing.
g. Rinse all parts several times in hot
(6) To remove the crank assembly from the
housing, loosen machine screw (15) on split locking nut
(14), and remove the locking nut, facing washer (12),

Privacy Statement - Press Release - Copyright Information. - Contact Us

Integrated Publishing, Inc. - A (SDVOSB) Service Disabled Veteran Owned Small Business