Hamilton Jet HJ241, Manual

Page: 105 / 202

9.1
Section 9
O
VERHAUL
NOTE: The Maintenance operations details in this
Section should be carried out when the
Vessel is on a Slip or in Dry Dock.
Overhaul of the Jet Unit should only be carried out
after an examination indicates the need for an
overhaul.
Refer to Section 8 Maintenance for details
of how to examine the Jet Unit.
The Overhaul Section of the Controls Manuals
contains additional information.
The following overhaul procedures can be
carried out on this Jet Unit:
1. Reverse Assembly Overhaul Sect. 9.2”.
2. Reverse Cylinder Overhaul. Sect. 9.2.4”.
3. Steering Assembly Overhaul Sect. 9.4”.
4. Tailpipe Area Overhaul Sect. 9.8”.
5. Bearing Housing Area Overhaul Sect. 9.6 ”.
6. HSRX Hydraulic Reverse System Overhaul.
Sect. 9.11 .
PRIOR TO COMMENCEMENT OF OVERHAUL:—
Disconnect and remove all control equipment
attached to components being overhauled. This
prevents damage to the less robust control
equipment.
Take care to identify electrical or hydraulic
connectors so they can be correctly replaced.
Cover all connectors to prevent entry of dirt or loss
of hydraulic oil.
OVERHAUL PROCEDURE:— The following
procedure describes the main activities when
carrying out a complete overhaul, but can be used
to plan any other type of overhaul.
1. Overhaul the Driveshaft (not described). Refer to
manufacturers manual).
2. Overhaul the Reverse Assembly.
3. Overhaul the Steering Assembly.
4. Overhaul and refit the Bearing Housing area of
the Jet Unit.
5. Overhaul and refit the Tailpipe area of the Jet
Unit.
6. Overhaul and refit the Transom Plate.
7. Refit the Steering Assembly.
8. Refit the Reverse Assembly.
9. Refit the Driveshaft (not described). Refer to
manufacturers manual).
10.Removal of the HSRX Pump Assembly from the
Jet Unit.
11.Refit the HSRX Pump Assembly to the Jet Unit.
ON COMPLETION OF THE OVERHAUL:— Perform
the appropriate commissioning of the Jet Unit as
described in
Section 6 Commissioning of this
Manual.
C
OMMISSIONING THE
J
ET
U
NIT AND
C
ONTROLS
S
YSTEM
.
It is important that a commissioning of the vessel be
carried out on completion of an overhaul activity as
adjustments and connections may have been
altered during the overhaul operation.
TOOLS:— All tools required for the overhaul of the
Jet Unit are shown on Drawing HJ-241-11-000
Tool Kit and Section 8.6 Tools of this Manual.