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 TM 5-1940-277-20
TM 1940-20/2
Section IV. TROUBLESHOOTING (Continued)
MK1 and MK2 w/SABRE or CUMMINS
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
32. WINDSHIELD WIPERS FAIL TO OPERATE.
Step 1. Visually inspect wiper motor for normal operation.
a. If wiper motor operating go to Step 2.
b. If not operating go to Step 3.
Step 2. Inspect windshield wiper drive unit.
a. Repair windshield wiper drive unit (refer to paragraph 3-13).
b. Replace windshield wiper drive unit (refer to paragraph 3-14).
Step 3. Check for presence of power at cab to console connector.
a. Replace wiper switch.
b. If power present replace scupper drains.
33. SCUPPERS DON'T DRAIN WATER FROM BOAT.
Step 1. Inspect scupper drains (refer to paragraphs 3-29 and 3-30).
a. Clean scupper drains (refer to paragraphs 3-29 and 3-30).
b. Replace defective scupper drains.
34. ELECTRIC BILGE PUMP DOES NOT DISCHARGE WATER (FORWARD OR AFT) (MK1).
Step 1. Check intake screen for blockage.
a. Clean intake screen.
Step 2. Inspect electrical connections and cables.
a. Tighten loose connections.
b. Replace defective cables and connections (refer to paragraph 3-143).
Step 3. Test switch (refer to paragraph 3-48).
a. Replace defective switch (refer to paragraph 3-47).
Step 4. Inspect pump assembly.
a. Repair pump assembly (refer to paragraph 3-145).
b. Replace defective pump assembly (refer to paragraph 3-143).
35. ELECTRIC BILGE PUMP DOES NOT DISCHARGE WATER (FORWARD OR AFT) (MK2).
Step 1. Check intake screen for blockage.
a. Clean intake screen.
Step 2. Inspect electrical connections, cables, and switch panel unit 2.
a. Tighten loose connections.
b. Replace defective switch panel unit 2 (refer to paragraph 3-51).
Step 3. Inspect pump assembly.
a. Repair pump assembly (refer to paragraph 3-145).
b. Replace defective pump assembly:
For MK2 aft pump, refer to paragraph 3-143.
For MK2 forward pump, refer to paragraph 3-144.
2-34
Change 2
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