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Preventive Maintenance Checks and Services
Table 2-1.
S - Semiannually A - Annually
Q - Quarterly
D - Daily W - Weekly M - Monthly
Items To Be
Interval
Item
Procedures
Inspected/
No.
D
W
M
Q
S
A
Serviced
PROPELLER SHAFT ASSEMBLY
a. Inspect at close range, the full length of all
90
q
accessible rubber and/or reinforced plastic covering on
Shaft
each shaft for deterioration, physical damage, lack
Assembly
adhesion or other defects. Evidence of loss of
adhesion of shaft covering is characterized by one or
more of the following:
(1) Loss of covering, entirely or in part.
(2) Rust stains where rust has leaked through the
covering in the vicinity of a cut, joint, patch,
or other flaw.
(3) Water blisters on rubber covering which are
recognized by swellings which are soft to the
touch.
(4) For plastic covering, look for rust stains in the
vicinity of a cut, pinhole, area of porosity,
patch joint, or other flaw. Tap the plastic
covering at regular 18-inch intervals with a light
hammer while holding the palm of the hand against
the covering on the other side of the shaft. Any
vibration, movement of covering or hollow sound is
evidence of loose bonding.
During operation, observe shafting for any
b.
objectionable vibrations.
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