TM 10-4320-345-13
Table 2-1. Operator Preventive Maintenance Checks and Services for Model TWDS20 - cont.
ITEM
INTERVAL
LOCATION
PROCEDURE
NOT FULLY MISSION
NO.
ITEM TO CHECK/
CAPABLE IF:
SERVICE
10
Before
ROADWAY
Inspect for collapsed, crushed or
Crossing guard crushed,
CROSSING
damaged roadway crossing guards.
smashed or bent onto
GUARDS
hose.
11
Before
SUSPENSION KITS
a. Check security of hose saddles,
Support cables or tie
support cables and tie downs
downs loose, broken or
b. Inspect suspended hoseline for
damaged.
cuts, tears and abrasions at hose
Hoses cut or torn.
saddles. Saddles should be spaced
five feet apart for correct hose line
support.
12
Before
PRESSURE
a. Inspect valve body for cracks and
Valve body cracked or
REGULATING
loose or missing attaching
damaged.
VALVE
hardware.
b. Inspect for cracked welds and bent
Coupling clamps missing,
or twisted components on skid
cracked or broken.
c. Inspect for missing, loose or
damaged coupling clamps
d. Check that bypass valves
Bypass valves stuck or
open/close freely.
jammed.
13
Before
PRESSURE RELIEF
a. Inspect body of pressure relief
Valve cracked or broken.
VALVE
valve for cracks.
b. Check for open, cracked or broken
coupling clamps.
2-14
