ICGSMA Bulletin - Indian Coast Guard

ICGSMA BULLETIN (JAN - MAR 13)
ANALOG If you are using an analog
controlled MSD Ignition such as a 6A, 6T or 6AL
series, SCI series, 7AL series, MSD 8 or 10 or
Blaster Ignition, the correct connection is when
the timing is retarded.
DIGITAL When using an MSD Digital-6 or
Digital-7 Plus or the Programmable Digital-7
Ignition Controls, the correct connection is when
the timing is more advanced.
WIRING Routing the magnetic pickup
wires can be very important for the performance
of the engine. Since the pickups are delivering a
voltage signal to trigger the ignition, it is
important that the wires are routed away from
other wiring, electrical components and spark
plug wires.
Notice that the pickup wires are twisted
around each other in the PN 8860 harness that
MSD supplies with the ignition. This helps create
a field around the wires for protection and
should be done with any other wiring of the
pickup. Also try to route he pickup wiring as
close to the engine block, frame. These parts serve
as large ground planes so there is less electrical
activity near their surface. Following these
guidelines will help ensure the proper trigger signal
from your pickups. PN 8862 harness features a
special ground shield that protects the trigger wires
from external interference.
TESTING You can check the resistance of the
magnetic pickups as shown below. If the value is
out of the specifications given, the pickup is at
fault.
COMMON PAINT DEFECTS AND REMEDIES
(DO YOU KNOW?)
LOSS OF GLOSS - Loss of gloss is caused due to poor
surface preparation or due to presence of oil or due to
over thinning of paint.
SOLUTION - Clean surface thoroughly and take all
recommended steps for surface preparation.
DISCOLORATION - After paint is applied, it may fade
or discolor. This is caused by particles in the wall
reacting with the paint when it is drying. Discoloration
could also be caused by water seepage, or by
contaminants in metal or wood.
SOLUTION - Repair water seepage. Make sure the
surface is dry before painting and apply an alkalineresistant
or oil-based paint.
SAGGING - Sagging happens when the paint droops
downward after being applied on the surface. It is
caused by the pigment separating from the paint and
settling at the bottom of the container and comes as a
result of insufficient stirring or shaking during storage
or storing for too long or under too much heat or faulty
thinning.
SOLUTION - Avoid storing in hot locations for long
periods. Store in accordance with the manufacturer’s
recommendations. Thin only with appropriate
recommended thinners.
A CASE STUDY-DEFECT RECTIFICATION ON
STBD MAIN ENGINE CONTROL
ICGS Annie Besant
INTRODUCTION
ICGS Annie Besant is fitted with two main
engine make M/s MTU, Germany ( MTU 12V 538
TB 82), which are fitted in FPVs class of ships. These
ships are fitted with MCS-4/RCS-3 control and input
supply is through 02 nos 12 volt DC 180 AH
batteries.
SYMPTOMS OF DEFECT:
During sailing on 30 Jan 13, fluctuation on
stbd main engine combinator and abnormal
parameters reading was observed at bridge and
MCR. Immediately both engines were brought
An insight to trouble shooters 7