Hamilton Jet HJ241, Manual

Page: 114 / 202

9.10
9 OVERHAUL
9.4 S
TEERING
A
SSEMBLY
R
EMOVAL AND
O
VERHAUL
HJ-241 / HSRX
Crank ball should be checked for excessive
wear.
The maximum clearance between the
Crank ball and the Nozzle Bush is 1.2mm
(0.047ins). Replace the Steering Crank [4] if the
diameter of the ball has worn below 20.8mm
(0.82ins) (This should be measured at 90º to
the shaft axis).
9.4.3 Nozzle Assembly Removal
Refer to Drawing HJ-241-06-000 Steering Assembly
General Arrangment Sht1 & 2.
1. Check the Steering Crank Bush [14] for security
and wear. Replace if loose worn or damaged.
2. Rotate the Nozzle [15] through its full arc of
travel to check for stiffness or wear in the Nozzle
Bushes [10] and Pivot Sleeves [12].
NOTE: The Nozzle / Nozzle Housing can be
removed as a complete assembly. To
remove, carry out the following actions:-
NOZZLE AND NOZZLE HOUSING REMOVAL:
Drawing
HJ-241-01-000 Basic Jet Assemblies Stand-
ard and Dry Run Sht 1 & 2 refers unless otherwise
stated.
1. To remove the Nozzle Housing complete with the
Nozzle still attached, remove the Nuts [27] and
Spring Washers [28] from the Studs [9], which
secure the Nozzle Housing assembly to the
Tailpipe.
2. Tap off the Nozzle Housing using a Rubber
Hammer and remove from the Studs [9].
3. Remove the Nozzle Insert [21] (Drawing HJ-241-
06-000 Steering Assembly General Arrangment
Sht1
refers) from inside the Nozzle Housing and
check for wear and damage. Replace or repair if
worn or damaged.
REMOVING THE NOZZLE FROM THE NOZZLE
HOUSING:
To remove the Nozzle from the Nozzle Housing,
carry out the following actions:-
1. Loosen the Screws [25] securing the JT Steering
Lip Seals [24] to the inner face of the Nozzle [15]
and ensure that the Lip Seals are free to move.
2. Whilst supporting the Nozzle, unscrew and
remove the upper and lower Nozzle Attachment
Bolts [11] and remove with the Pivot Sleeves [12],
Steering Pivot Thrust Washers [23] and Stepped
Adjusting Washer [13].
Note that the Pivot Sleeves
[12] are threaded onto the Attachment Bolts [11].
NOTE: If the Pivot Sleeve [12] is difficult to remove,
the Nozzle Attachment Bolt [11] can be
threaded partially into the Pivot Sleeve [12]
to extract the Pivot Sleeve [12].
3. Rotate the Nozzle slightly and pull rearwards to
remove Nozzle [15] from the Nozzle Housing [9].
4. Clean all parts thoroughly, examine for wear and
damage, replace as necessary.
INSPECTING THE STEERING NOZZLE [15] AND
NOZZLE HOUSING [9]:
Examine the following components for wear or
damage and repair or replace as necessary:-
1. Steering Nozzle:- Check that the Steering Arm
on the top of the Nozzle is not bent. If any cracks
are visible on the underside of the Steering Arm,
or in the web adjacent to the Pivot Boss,
the
Nozzle MUST NOT be used and should be replaced.
If no faults are found, the underside of the
Steering Arm should be crack tested using a dye
penetrant technique to prove the integrity of the
Steering Arm before re-use.
Carry out a check of
the “ Nozzle Vertical End Float Adjustment”, refer
to Item 12 below.
2. Steering Pivot Bush Sleeves [22]. Replace if any
signs of wear, damage or scoring is evident.
3. Steering Pivot Bush [10]. Check for wear and
damage. Replace.
4. Steering Crank Bush [14]. Check for wear or
damage. Replace if worn or loose.
5. Thrust Washer [23]. Check for wear and
damage. Replace.
6. Stepped Adjusting Washer [13]. Check for
wear, deformity and damage. Replace.