Belt Tensioning - Beta Marine BV1305 Operation And Maintenance Manual

CLEANING THE HEAT EXCHANGER TUBE STACK AND REPLACING WASTING ZINC ANODE
(1) The wasting zinc anode should
be checked every six months and
replaced every year or as
necessary. The anode is attached
to the bolt inserted in the aft end
cap of the heat exchanger. See
fig. 2j.
(2) Unscrew the bolt and replace the
complete unit with a new one.
Zinc
Anode
BELT TENSION
65 AMP ALTERNATOR (HEAT EXCHANGER COOLED)
WARNING
Belt tension must only be checked
with the engine switched off.
(1) On heat exchanger cooled engines
a single 65 amp is fitted as
standard. These alternators are
adjusted as follows.
(2) The belt tension is adjusted by
swinging the alternator outboard
as it pivots on its power support
bolt.
(3) With the engine stopped, loosen
the support bolts and the link
adjusting bolt.
100 AMP ALTERNATOR (OPTION)
The same method, as outlined above
applies, but final tensioning must be
by hand only. Over tensioning will
(3) Check for leaks.
(4) It is possible for fine sea weed
and other debris to get past the
inlet filter and into the tube stack.
This should be removed and
cleaned. See fig. 2k.
(5) Drain off coolant into a bucket.
(6) Unscrew the 2 end cap retaining
bolts (one each end of the tube
stack). Remove the 'O' rings and
Fig. 2j
(4) Push alternator outboard to
tension and tighten link bolt.
Check that the depression of the
belt at position shown is
approximately
when pushed down firmly by
thumb. Tighten support bolts.
(5) Belt tension should be regularly
checked especially during the
first 20 hours of running in a
new belt, as stretching
occurs.Belt tension must only be
checked with the engine
switched off.
cause premature failure of
components.
(7) Re-assemble using new 'O' rings.
(8) Re-fill engine with water/anti-
1 / " or 12 mm
2
pull out tube stack. Clean tube
stack and end caps.
Do not overtighten end cap bolts
and make sure the tube stack is
the right way round.
freeze solution and run engine up
to temperature to check for leaks.
Fig. 2k
Link adjust bolt
Support bolts