Cutlass Bearing; Electrical Systems - Tayana 37 Operation & Maintenance Manual

that no more than one or two drops per minute flow in. If new packing is
required, packing materials can be purchased at any marine supply.
Repacking requires about 10 inches of 3/16 material. Remove the nuts from
the two retaining bolts which hold the collar in place. Pull the collar up the
shaft toward the engine. Water will flow in rather heavily, but it will be
easily controlled by the electric bilge pump. Wrap the packing material
around the shaft just in front of the gland. Pull the collar down the shaft so
that it tends to push the new packing material into the gland. Using the nuts
on the retaining bolts, force the packing material evenly into the gland and
tighten until there is a water flow of only about one drop per minute. Then
install and tighten the locking nuts.
d. Cutlass Bearing
The cutlass bearing is mounted in a bronze casting as shown in figure V.-1..
This casting is designed to allow full flow of water throughout the length of
the bearing. This is important because the cutlass is water lubricated.
A cutlass bearing should last several years. When the bearing is new, the
shaft will be tight and no lateral movement will be apparent when trying to
push the shaft side to side. As the bearing wears, one can move the shaft
slightly from side to side or up and down. Once that lateral movement is
more than about 1/16", the bearing should be changed.
Changing the bearing is a major maintenance job and might be best left to
the professional yacht mechanic. It requires that the boat be hauled. The
shaft must be removed by loosening the coupling set screws and pulling the
shaft back through the gland. The four nuts on the bearing casting retaining
bolts are removed. The casting itself is threaded to the shaft log. Therefore,
one must unscrew the shaft log from the casting. Once the casting is
removed, it is a simple matter to drive out the cutlass.
It is not always necessary to remove the cutlass bearing casting. After the
shaft is removed, the bearing can sometimes be drawn from the casting. One
technique is to saw a small section out of the bearing so that it can be
compressed and drawn. One must use an unframed hacksaw and be careful
to saw only the bearing.
F. ELECTRICAL SYSTEMS
As mentioned in an earlier section. the TAYANA 37 has two standard electrical
systems--a 12 volt system which gets its power from batteries and the engine alternator,
and a 110 volt system which is powered through the shore power cable or with an on
V-18