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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
Designand Section
5.2 Hull Preparation
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
Checking the Insulation
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
"Design Basics" Section and Section
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
able Trim Tabs Location
Section of this manual.
3.2 Hull
in this
4.3.1
and the Installation
in the
5.6.4 Ex-
and
Figure 13: Allow-
in the "Design Basics"
5.7 I
NSTALLATION
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
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
Re-Assembly of the Bearing
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
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.
5 INSTALLATION
C
J
HECKS FOR THE
ET
Locations).
9.6.3
Housing, Item 28.
in the "Design Basics"
U
NIT
5.9
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