TM 10-4610-241-24
TO 40W4-13-42
Table 2-2. Unit Troubleshooting - continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
CHEMICAL FEED PUMP ASSEMBLY
1.
PUMP ASSEMBLY FAILS TO PRIME.
WARNING
Chemicals used on ROWPU are toxic. Wear rubber gloves and apron, and eye and respiratory
protection when working with components of the chemical feed system.
Step 1. Check for cracked, split or damaged suction, return and and feed tubes.
If tube is defective, replace tube. Refer to Paragraph 2-31.
Step 2. Disconnect return and suction tubes from chemical container, and feed tube from liquid head assembly.
Step 3. Set three way valve to PRII ML, position and pour water into return tube.
If water does not come out of feed tube, replace three way valve. Refer to Paragraph 2-53.
Step 4. Connect feed tube to liquid head assembly on chemical feed pump.
Step 5. Start chemical feed pump and set adjustment on liquid head assembly to 10.
Step 6. Raise suction tube above level of pump and pour water into suction tube.
a. If water comes out return tube, indicating that pump is functioning correctly, repair chemical fed can.
Refer to Paragraph 2-25.
b. If water does not come out of return tube, pump is defective. Repair liquid head assembly
(Paragraph 2-61). If trouble persists, notify Direct Support Maintenance.
2.
INADEQUATE FLOW OF CHEMIICALS.
Refer to Malfunction 1, Chemical Feed Pump Assembly, if this malfunction occurs.
2-26
