| Tweet |
Custom Search
|
|
|
||
 TM 55-1905-223-24-18-1
Troubleshooting - CONT
Table 2-2.
Malfunction
Test or Inspection
Corrective Action
POTABLE PIPING SYSTEM - CONT
Check for leaking valves.
STEP 6.
Leakage through stuffing-box packing.
a.
(1) Tighten the gland.
(2) If the gland has entered the stuffing-box to an extent that there
is no remaining adjustment. Repack packing gland.
Leakage across valve seats.
b.
NOTE
Leakage across the valve seats may be due to foreign
matter lodged in the seats.
(1) Occasionally foreign matter can be flushed away by allowing normal
flow of water through the valve.
(2) If the leakage continues. Repair valve.
STEP 7. Check for defective hydropneumatic pressure tank.
Inspect for leaks, excessive corrosion, security, and general condition of
tank.
Check valve jammed by foreign matter.
STEP 8.
Remove valve (para. 2-319).
Inspect and clean as necessary.
b.
Check for malfunctioning pressure gauge.
STEP 9.
Test the gauge as follows:
a.
(1) Remove gauge from system (para. 2-321).
(2) Install a gauge of known accuracy to check system.
(3) Replace faulty gauge (para. 2-321).
STEP 10. Check for defective pressure switches.
Replace pressure switch (para. 2-322).
STEP 11. Pump casing or discharge line partially clogged or damaged.
Clean pump casing.
b. Clean or replace discharge line.
STEP 12. Check pump for wrong direction or rotation.
CAUTION
Serious damage can result if the pump is operated with
i n c o r r e c t rotation.
2-160
|
||
|
||
