|
| |
TM5-2420-222-34
14-12.
BACKHOE BOOM AND SWING VALVE
13.
Remove two preformed packings (23) and backup washers (22)
from valve body (2). Discard pre- formed packings and backup
washers.
NOTE
Boom
valve
has
only
one
anti-
cavitation detent plunger; swing valve
has two. Repeat steps 14 and 15 as
required
to
remove
second
anti-
cavitation detent plunger.
14.
Place valve body (2) in vise with caps and remove plug (27) and
preformed packing (26). Discard preformed packing.
15.
Using magnetic retrieving tool, remove anti-cavitation detent
plunger (24) and spring (25) from valve body (2).
16.
Remove valve body (2) from vise.
b.
CLEANING AND INSPECTION
WARNING
• Dry cleaning solvent, P-D-680, is toxic and flammable. Always wear protective
goggles and gloves, and use only in a well-ventilated area. Avoid contact with
skin, eyes, and clothes, and DO NOT breathe vapors. DO NOT use near open
flame or excessive heat. The solvent's flash point is 100°F-138°F (38°C-59C). If
you become dizzy while using cleaning solvent, immediately get fresh air and
medical help. If solvent contacts eyes, Immediately wash your eyes and get
medical aid.
• Compressed air used for cleaning or drying purposes, or for clearing restrictions,
should never exceed 30 psi (207 kPa). Wear protective clothing (goggles/shield,
gloves, etc.) and use caution to avoid injury to personnel.
1.
Clean valve body with rags dampened with dry cleaning solvent. Dry thoroughly with compressed air.
2.
Clean fluid flow restrictor and valve with dry cleaning solvent and rags. Dry thoroughly with compressed air.
Ensure that holes are free of material and dirt.
3.
Clean all other metal parts with dry cleaning solvent. Dry thoroughly with compressed air.
4.
Clean bellows with rags dampened with water and detergent solution. Rinse with clean water. Dry thoroughly with
clean, dry rags.
5.
Inspect two springs (19) for cracks, breaks, and abnormal bends. Using portable spring resiliency tester and
machinist’s rule, apply 8 oz (2.2 N) of force and measure compressed length of springs. Compressed length must
be 0.8125 in. (20.6375 mm).
TA701592
14-62
|
