Hamilton Jet HJ241, Manual

Page: 121 / 202

9.17
9 OVERHAUL
9.6 B
EARING
H
OUSING
A
SSEMBLY
O
VERHAUL
HJ-241 / HSRX
9.6 BEARING HOUSING
ASSEMBLY OVERHAUL
Refer to Drawings HJ-241-01-000 Basic Jet Assem-
blies Standard and Dry Run Sht 1 & 2 .
Overhaul of the Bearing Housing with the Vessel
afloat is not recommended, as the Seal Face Holder
would not remain in place once the Bearing Housing
is dismantled.
Bearing Housing Dismantling
Refer to Drawings HJ-241-01-000 Basic Jet Assem-
blies Standard and Dry Run Sht 1 & 2.
DISMANTLING THE BEARING HOUSING ASSEM-
BLY:-
To dismantle the Bearing Housing, carry out the
following operations:
1. Disconnect the Drive Shaft from the Jet Unit
Coupling.
2. Fit the Reaction Arm Tool to the Jet Unit Coupling
to prevent the Coupling from turning.
3. Unscrew Coupling Nut [10] and remove.
4. Remove the Reaction Arm Tool from the Jet Unit
Coupling.
5. Fit the Puller to the end of the Coupling and
remove the Coupling. Gently tap the Coupling
with a hammer during removal.
6. Remove the Coupling Key [11].
7. Remove the Nuts [17] and Spring Washers [16]
from Studs [43] attaching the Bearing Housing [8]
to the Intake [19].
NOTE: If the Mainshaft is to remain in the Jet Unit,
the Water Seal Retaining Pin [15] can
remain fitted to the Mainshaft.
8. Remove the Bearing Housing [8] complete from
the Intake [19] with Bearing [7], Outer Seal [6]
and Outer Seal Sleeve [5].
NOTE: One half of the Bearing Inner Race will
probably stay on the Mainshaft. Remove
this and keep it with the Bearing. Do not
swap the Bearing Inner Race halves. Keep
the Bearing clean.
9. Remove the Bearing [7] and the outer Seal [6]
from the Bearing Housing [8].
10.Remove the Bearing Carrier [3] from the
Mainshaft.
W
ARNING
Exercise extreme care if Water
Seal replacement is to be carried
out in the vessel as water may
enter the vessel through the Intake
Opening. Never leave the Inspec-
tion Cover removed.
C
AUTION
The Water Seal should not be
removed unless it is being
replaced. The Water Seal will not
perform correctly if it is removed
and then reinstalled.
The Water Seal need only be
replaced if it is leaking, or there is
insufficient material left to last to
the next inspection. refer to sec-
tion 8 Maintenance for details of
the inspection required.
Figure 29: Bearing Housing & Waterseal Components