TM 5-4610-233-13&P
Item
no.
Table 4-1. Unit Preventive Maintenance Checks and Services (Interval) Schedule
M - Monthly
Q - Quarterly
A - Annually
Interval
Item to be
inspected
Solution feed pump
diaphragm
Flow controller
4-inch manifold
Frame
Procedures
lnspect for splitting, cracking, and dry rot.
Inspect for damaged threads,
Inspect for cracks, chipping, damaged gaskets, damaged bolts and
nuts, and damaged flanges.
Inspect for cracks, broken welds, and missing data plates.
Section IV. TROUBLESHOOTING
4-7. GENERAL. This manual cannot list all malfunctions that may occur, nor all tests of inspections and
corrective actions. If a malfunction is not listed or is not corrected by listed corrective actions, notify your
supervisor.
4-8. TROUBLESHOOTING TABLE. The troubleshooting table (table 4-2) lists the common malfunctions which
you may find during the operation or maintenance of the hypochlorination unit or its components. You should
perform the tests/inspections and corrective actions in the order listed.
Table 4-2. Unit Troubleshooting
Malfunction
Test or inspection
Corrective action
1. SOLUTION FEED PUMP AIRLOCKED AT STARTUP
WARNING
Hypochlorite solution is toxic to skin and eyes. Wear skin
and eye protection to prevent personal injury.
Step 1. Check that check valves in solution feed pump suction hose and pump discharge hose are
good.
Repair check valves. Refer to paragraph 4-24.
4-3
