Hamilton Jet HJ241, Manual

Page: 132 / 202

9.28
9 OVERHAUL
9.9 H
ATCH
E
XTENSION
(O
PTIONAL
E
XTRA
)
HJ-241 / HSRX
9.9 HATCH EXTENSION
(OPTIONAL EXTRA)
Refer to Drawing HJ-241-10-004 Hatch Extension.
C.W.F. Hamilton & Co Ltd can supply, as an
optional extra, an Inspection Hatch Extension [1].
This item enables work to be carried out on the Jet
Unit where normally by removing the Inspection
Hatch Cover may allow water to enter the vessel.
The Hatch Extension raises the height of the
Inspection Hatch by approximately 150mm.
9.9.1 Hatch Extension Fitting.
Refer to Drawing HJ-241-01-000 Basic Jet Assem-
blies Standard and Dry Run Sht 1 & 2 and Drawing
HJ-241-10-004 Hatch Extension.
To fit the Inspection Hatch Extension [1], carry out
the following operation:-
1. Ensure that the water level is below the level of
the Inspection Cover.
2. Ballast the bow end of the vessel to ensure that
water does not enter the vessel through the
Inspection Hatch.
3. Remove Nuts [23] and Spring Washers [22] from
the two Studs [58] retaining the Inspection Cover
[20] on the Intake.
4. Remove the Inspection Cover [20] and O Ring
[34].
5. Check the O Ring [34] and replace if damaged or
distorted.
6. Smear O Ring [34] with grease and refit to the O
Ring groove in the Inspection Cover [20].
7. Ensure that O Ring [2] on the base of the
Inspection Hatch Extension [1] is not damaged or
distorted.
Refer to Drawing HJ-241-10-004
Hatch Extension.
8. Smear the O Ring [2] with grease and refit the
Hatch Extension [1].
9. Fit the Hatch Extension over the 2 Studs [58]
(shown on Drawings HJ-241-01-000 Basic Jet
Assemblies Standard and Dry Run Sht 1 & 2
10.Secure with Spring Washers [22] and Nuts [23]
(Shown on Drawing HJ-241-01-000 Basic Jet As-
semblies Standard and Dry Run Sht 1 & 2 and
torque load to the recommended torque.
11.Fit the Inspection Cover [20] to Studs [3] (shown
on Drawing HJ-241-10-004 Hatch Extension )
and secure with Spring Washers [5] and Nuts [4].
Torque load to the recommended torque.
12.Once the vessel is "In Use", ensure that the
Hatch Extension is not leaking water.
9.9.2 Hatch Extension Removal.
Refer to Drawings HJ-241-01-000 Basic Jet Assem-
blies Standard and Dry Run Sht 1 & 2 and Drawing
HJ-241-10-004 Hatch Extension.
TO REMOVE THE HATCH EXTENSION, CARRY OUT
THE FOLLOWING OPERATIONS:-
1. Ensure that the water level is below the level of
the Intake Inspection opening. If necessary,
ballast the bow end of the vessel to ensure that
water does not enter the vessel through the
Inspection opening when the Inspection Cover is
removed.
2. Remove Nuts [4] and Spring Washers [5] from
Studs [3] (shown on Drawing HJ-241-10-004
Hatch Extension ) securing the Inspection Cover
[20] to the Hatch Extension.
3. Remove the Inspection Cover [20] and O Ring [34]
from the top of the Hatch Extension. Refer to
Drawing HJ-241-01-000 Basic Jet Assemblies
Standard and Dry Run Sht 1 & 2.
4. To remove the Hatch Extension from the
Inspection opening, remove Nuts [23], and
Spring Washers [22] from the Studs [58] securing
the Hatch Extension to the Intake opening.
5. Remove the Hatch Extension [1] and O Ring [2]
from the securing Studs on the Intake opening.
W
ARNING
Extreme care is required whenever
the Inspection Cover is removed as
water may enter the vessel
through this opening.
Never leave the Inspection Cover
removed without constant
monitoring of the water levels.
W
ARNING
Extreme care is required whenever
the Inspection Cover is removed as
water may enter the vessel
through this opening.
Never leave the Inspection Cover
removed without constant
monitoring of the water levels.