TM 55-2210-224-34
3-18.
EMERGENCY SAND PRESSURE SWITCH
This task covers:
a.
Test
b.
Removal
c.
Installation
INITIAL SETUP
Tools
Material/Parts
Tool kit SC4940-97-CL-E12
Drycleaning solvent (Item 34, Appendix B)
REMOVAL
1.
Disconnect air line fitting (1) from control switch (2).
2.
Loosen cover screw (3) and remove cover (4) and
gasket (5). Tag and disconnect wires (6).
3.
Remove two nuts (7) and lockwashers (8) and remove control switch (2) from mount bracket (9).
4.
Remove pipe elbow (10) from control switch (2).
TEST
5.
Connect a multimeter to switch leads.
6.
Apply a regulated air source to switch and check that switch trips at a varied range of pressure from 5 to 75 psi
(34.5 to 517 kPa).
INSTALLATION
7.
Install pipe elbow (10) on control switch (2) and position switch against mount bracket (9).
8.
Install two lockwashers (8) and nuts (7).
9.
Connect wires (6) and remove tags. Install gasket (5) and cover (4) and tighten with cover screw (3).
10.
Connect air line fitting (1) to control switch (2).
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