Hamilton Jet HJ241, Manual

Page: 135 / 202

9.31
9 OVERHAUL
9.11 HSRX H
YDRAULIC
R
EVERSE
S
YSTEM
HJ-241 / HSRX
Should it be necessary to run the Jet Unit without a
Screen Rake, Blanking Plugs [1] can be fitted in place
of the Port and Starboard Screen Rake Bearings.
To fit the Blanking Plugs, carry out the following
procedure:
1. Remove the Screen Rake as shown in Section
9.10.1 Screen Rake Removal.
2. Ensure that "O" Ring [4] fitted to the Screen Rake
Blanking Plug [1] is not damaged, cut or
distorted.
3. Liberally coat the shaft of the Blanking Plug with
grease and fit onto Studs [9]. Refer to Drawings
HJ-241-01-000 Basic Jet Assemblies Standard and
Dry Run Sht 1 & 2
4. Secure with Spring Washer [3] and Nut [2].
Torque load to the recommended torque.
5. Repeat Items 2 to 4 above to fit the second
Blanking Plug.
9.10.4 Screen Removal
Refer to Drawing HJ-241-01-000 Basic Jet Assem-
blies Standard and Dry Run Sht 1 & 2.
To remove the Screen from the Intake, carry out the
following actions:-
1. 1.Whilst supporting the Screen [24], remove the
4 Nuts [25], Flat Washers [29] off the Studs [21]
securing the front of the Screen to the underside
of the Intake Block.
2. Remove the 4 Nuts [25], Flat Washers [29] off the
Studs [21] securing the rear of the Screen to the
underside of the Intake Block.
3. Lower the Screen off the Studs [21] and remove
from the vessel for repair, refurbishment.
9.10.5 Screen Re-Fitting
Refer to Drawing HJ-241-01-000 Basic Jet Assem-
blies Standard and Dry Run Sht 1 & 2.
Ensure that the Screen Rake has been re-fitted prior
to re-fitting the Screen.
Refer to Section 9.10.2
Screen Rake Re-Fitting .
1. Ensure that the Studs [21] that support the front
and rear of the Screen are securely fitted to the
Intake. If the Studs are loose, refit using Loctite
263.
2. Offer the Screen up to the Studs [21] on the front
and rear of the underside of the Intake and secure
in position with Flat Washers [29] and Nuts [25].
3. Tighten to the recommended torque.
9.11 HSRX HYDRAULIC REVERSE
SYSTEM
9.11.1 Removal of the Pump
Assembly from the Jet Unit
Refer to the following Drawings :-
CT-HPU-01001 Hydraulic Power Unit ” f
CT-HSE-12-001 Hose Kits” .
TO REMOVE THE PUMP ASSEMBLY FROM THE JET
UNIT, CARRY OUT THE FOLLOWING ACTIONS:-
Refer to Drawing CT-HSE-12-001 Hose Kits .
1. Drain the oil from the Pump [1], Jet mounted Oil
Cooler and hose connections.
2. Disconnect the High Pressure Hose [H1] between
the forward connection on the Cylinder and the
3/8" BSP Adaptor on the rear of the Pump.
3. Remove the 3/8" Push Lock Hose [H2] between
the rear connection on the Cylinder and the
outlet on the top of the Jet mounted Oil Cooler.
4. Remove the 3/8" Push Lock Hose [H3] from the
lower connection on the Jet mounted Oil Cooler.
5. Remove the Hose Clip [7] from the inlet to the
Pump and remove the Hose.
6. Fit blanks to all the hydraulic connection points
to prevent the ingress of moisture and dirt into
the hydraulic system.
Refer to Drawings CT-HPU-01001 Hydraulic Power
Unit .
7. To remove the Belt from the Pump, loosen Nut [8]
from the Stud in the elongated slot in the Support
Bracket [4] at the rear of the Pump [1].
8. Slacken Screw [9] securing the Pump [1] to Mount
Bracket [3] at the pump forward lower
attachment point.
9. Slacken Nut [8] securing the Pump [1] to the
Intake Casting at the rear lower attachment point
of the pump.
10.Push the Pump inboard towards the Bearing
Housing. It should now be possible to remove
the drive belt from the Pump pulley.
11.Remove Nut [8] and Spring Washer [7] from Stud
[5] at the inboard end of the Adjusting Link [4].
12.Remove Nut [8], Spring Washer [7] and Special
Washer [13] from the Stud in the elongated slot
in the Adjusting Link [4] at the rear of the Pump
[1].