TM 55-1930-209-14&P-3
Table B-1. Preventive Maintenance Checks and Services for ROWPU System (Continued)
B-Before
D-Daily
Q-Quarterly
D-During
W-Weekly
S-Semiannually
A-After
M-Monthly
A-Annually
ITEM
PROCEDURES
INTERVAL
TO BE
CHECK FOR AND HAVE
EQUIPMENT
ITEM
INSPECTED
REPAIRED OR ADJUSTED
IS NOT READY/
NO.
AS NECESSARY
AVAILABLE IF:
B D
A D W M Q
S
A
4) Use drum lifter and bridge crane with
2-ton hoist to obtain new drum. Posi-
tion and secure drum in rack
5) Install section hose in drum through
hole in large lung. Foot valve should
be just above the drum bottom.
6) Connect other end of suction hose to
chemical metering pump.
7) Insert breather hose into smaller lung
in drum. Make sure hose does not
siphon chemical onto the deck.
d. Check for chemical seepage around
Class IllI leaks.
head disk. If seepage occurs replace
pump diaphragm as follows:
1) Place pump stroke length knob at 100
percent.
2) Remove four screws and flatwashers
holding dosing head to pump.
Remove dosing head.
3) Place pump stroke length knob at 0
percent. Remove pump diaphragm by
turning counterclockwise.
The head
disc will also fall free.
4) Install replacement diaphragm by
holding head disc in position (drain
slot on inside) and turning diaphragm
clockwise onto plunger shaft end.
Grasp perimeter of diaphragm and
hand tighten.
5) Place pump stroke length knob at 100
percent. Rotate head disc until marker
hole is up and drain slot is down. Align
four screw holes with motor housing
holes.
6) Install dosing head with arrow ori-
ented up. Secure dosing head with
four screws and flatwashers. Tighten
screws evenly.
B-6
