Olympic Hydro Drive, Manual

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[7]
SECTION III
Propeller Installation & Removal Procedure
INSTALLATION
1. Inspect propeller shaft seal for leakage (oil in
drive).
2. Inspect propeller bore and prop shaft for
cleanliness.
3.
Install 3/8” square x 3” long stainless steel key,
taking care that key is firmly seated in keyway
and not climbing up end of keyway.
4. Coat shaft and key with 50-50 mixture of white
lead and lube oil, or Never-Seeze Compound.
5. Install propeller to shaft, being sure that key
and keyway are properly aligned. Gently push
propeller all the way on taper until taper fits up.
Slide propeller off taper to check taper fit and
re-install propeller with a firm push, seating
taper.
6. Block propeller with soft wood close to hub and
install jam nut. Tighten to 150 foot pounds
torque.
7. Install lock-nut, holding jam nut and torque
against jam nut to 300-400 foot pounds torque.
8. Install new 5/32 x 1 ½ stainless steel cotter pin,
bending both legs around shaft.
REMOVAL (Always use puller)
1. Remove cotter pin.
2. Remove lock nut.
3. Slack jam nut about
½”.
4. Install puller using 3/8
– 16 UNC hardened steel
puller bolts.
5. Block propeller close to hub (using soft wood)
against firm footing and tighten center puller
bolt. If propeller does not break loose by hand
with 15” long handle wrench, apply flame heat
to propeller hub, but do not heat so that metal
discolours. If propeller was properly installed, it
should be off the taper.
Corrosion Protection
To help prevent electrochemical corrosion,
each U360 drive is furnished with sacrificial
zinc anodes which must be replaced when
they are substantially “eaten away” to
maintain their effectiveness. Of course, these
anodes must not be painted over since their
effectiveness depends on their being in
contact with water.
It is suggested that additional zinc anodes be
attached to hulls of metal vessels to reduce
corrosion of the U360 drive and the hull
itself. Vessels used in fresh water may not
require additional anodes; but vessels used
in seawater usually require liberal quantities
of anodes to ward off costly corrosion.
Attachment of the drive to the hull must be
accomplished with fasteners which are close
to the drive and hull materials in the Galvanic
Series. Since the U360 drive is cast ductile
iron and most hulls are welded carbon steel,
the use of steel or stainless steel fasteners is
recommended.
DO NOT use copper alloy fasteners.