Hamilton Jet HJ241, Manual

Page: 69 / 202

5.9
5 INSTALLATION
5.7 I
NSTALLATION
C
HECKS FOR THE
J
ET
U
NIT
HJ-241 / HSRX
5.7 INSTALLATION CHECKS FOR
THE JET UNIT
JET UNIT: MOUNTING:
1. Check that the Intake Block is faired to the hull
bottom. Contours should be smooth with no
steps or protrusions greater than 2mm.
2. Check that there are no flow obstructions
forward of the Intake ( Refer to Hull details in the
Jet Designers Manual and also Section 3.2 Hull
Design and Section 5.2 Hull Preparation in this
manual).
3. Inspect the Intake Block for obvious distortion or
gaps between the Jet Unit Intake and the Intake
Block.
4. GRP and Aluminium Hulls Only; Check that the
silicone sealant between the Intake Block and the
Jet Unit Intake has not squeezed out into the
water passage. Trim off excess sealant if
necessary.
5. Steel Hulls Only; Check that the sealant between
the Intake Block and the Jet Intake has not
squeezed out into the water passage. Check that
the Intake Block Gasket and sealant between the
Intake Block and the Hull Flange has not
squeezed out into the water passage. Check that
the Intake Block Gasket has been fitted properly,
reposition if required and trim off any excess
sealant if necessary.
6. Check the Transom Plate Seal is correctly located
and secured. (Do not over tighten) . If two people
are available and the vessel is indoors, a strong
light may be used to check the fit of the Transom
cutout and Transom Seal.
7. Steel Hulls Only; Check that the Jet Unit is
insulated from the Hull (Refer to Section 4.3.1
Checking the Insulation and the Installation
Drawings contained in this manual) .
8. Check that the engine exhausts are above the
expected waterline or well clear of the water jets.
Refer to Section 3.7.5 Exhaust Systems in the
"Design Basics" Section and Section 5.6.4 Ex-
haust Systems in the "Installation" Section of
this manual.
9. Check that the Hull Trim Tabs (if fitted) will not
interrupt reverse flow from the water jets. Refer
to Section 3.2.4 Trim Tabs and Figure 13: Allow-
able Trim Tabs Location in the "Design Basics"
Section of this manual.
JET UNIT: GENERAL:
1. Ensure that the Impeller is fitted to match the
engine rating. The Impeller part number
(Stamped on the Impeller Hub) can be viewed
through the Main Inspection Cover .
2. Check that the internal and external Anodes are
in place and have not been painted over. (Refer
to Drawing HJ-241-13-002 Anode Locations ).
3. If antifouling has been applied to the Jet Unit
casing, ensure that it is compatible with
aluminium
(i.e. Not copper based) .
4. Check that the Main Inspection Cover O Ring is
correctly located and that the securing Nuts are
tightened to the recommended torque.
5. Check any water offtake connections (if fitted) for
correct fitting and security. Check that any
unused water offtakes are correctly plugged.
6. Check that the Bearing Housing has been filled
with the recommended grease prior to operating
the Jet Unit for the first time.
Refer to Section 9.6.3
Re-Assembly of the Bearing Housing , Item 28.
DRIVE SHAFT:
1. Ensure that the Driveline details have been
checked and approved by CWF Hamilton & Co
Ltd.
2. On universal joint drive shafts (Refer to Section
3.3 Drivelines in the "Design Basics" Section of
the Manual) check the following:-
• Yoke offset angles are in the same plane,
are equal and <5°.
• Yokes are in the same plane.
3. On Line Shafts supported by bearings ( Refer to
Section 3.3 Drivelines in the "Design Basics"
Section of the Manual) check the following:-
• Support bearings are aligned with the engine
flywheel.
• Outer support bearings are positioned close
to the end couplings.