Testing Continuity; Testing Capacitors - Westerbeke 6.5 MCG Service Manual

BC GENERATORS TROUBLESHOOTING
TESTING CONTINUITY
Quick field check (no capacitance scale on meter).
Connect a digital ohm meter or analog ohm meter
· (high scale)
to
the capacitor terminals.
The
meter will
register and arbitrary ohm value for the material in the .
capacitor. the meter's battery will then start to charge the
capacitor and tl,le ohm value will increase.
If the meter does not react as above, the capacitor is faulty.
· The method above indicates a presumably good capacitor,
but does not verify it's microfared rating as would be
necessary when troubleshooting a capacitor whose MF rating
has dropped causing a low AC voltage output. In such cases,
the capacitors rating MUST
be
verified accurately. ·
A
WARNING:
Capacitors must be discharged before
handling as they store electricity and can pack a poten·
tlaUy lethal charge even when disconnected from their
power source • .
'-------DISCHARGING-.
-~.,.,...
THE CAPACITOR
74
CAPACITOR RATINGS AND PART NUMBERS
25MFD
31~.5MFD
35MFP
4oMi=o
18MFD
45!VIFD
Pn.#046875
Pn. #046978·
Pn.#049627
Pn.#054730
Pn.#Ul9556
.P~h:
#0;46801
NOTE: When changing a capacitor due to a capacitor faiiure,
referenee ·the capq.citor rating as printed
on
th~
body of the
capai::itor
and'
order
the
correct replacement. Installing a
capacitor. of a higher.MFD- rating will result in high AC
output vo?tage 'and installing a capacitor of a lower MFD __
rating will result in low AC output voltage .
. .
.