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 TM 5-1940-277-20
TM 1940-20/2
Table 2-1. Unit Preventive Maintenance Checks and Services (cont)
W-Weekly
Q-Quarterly
S-Semiannually
Item to be inspected
Interval
Procedure: Check for and have repaired, filed,
Item
or adjusted as needed
No.
S Item
Perform all operator PMCS first
WQ
11
b.
Steering nozzle (4) and reversing scoop (6) assemblies.
(1) Check for loose, bent, worn, or missing linkages. Check for loose, worn or
missing hardware. Check for cracked, bent, or broken steering nozzle (4) or
steering components (5). Rotate steering nozzles from stop to stop and
adjust them so they rotate in unison and contact their stop at the same
time.
(2) Check for loose, bent, cracked, or broken reversing scoop (6) or cover (7).
Check for loose, worn, or missing brush assembly. Pull reversing scoop
control levers to the full reverse position and adjust the scoops so that the
upper edge is even with the reversing indicator attached to the steering
nozzle. Push reversing scoop control levers to full forward position and
check that reversing scoops engage their stops.. If stops are not engaged,
adjust linkages, rotary control, or cables.
BILGE PUMPS.
a.
Electric bilge pumps (1). Open and secure engine and hydrojet hatch covers.
Remove four mounting bolts (2) and the two bilge pumps with mounting
brackets (3). Remove four screws securing the screens and remove the
screens. Clean and inspect screens. If screens are damaged or broken, replace
them. Check for damaged or dogged pump impellers. Assemble and install
pumps. check the pumps for proper operation and output. Check the system
for leaks.
b.
Hand bilge pump (4). Open stowage locker. From inside stowage locker,
remove bilge pump top cover and check inside pump for a dogged or damaged
diaphragm. Install top cover, operate pump, and check for proper operation
and output. Check the system for leaks.
Change 2
2-13
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