Hamilton Jet HJ212 Installation And Service Manual page 96

Overhaul
Inspect the steering nozzle
Check the following components for wear or damage and repair or replace as necessary.
Steering nozzle [16]
Inspect the nozzle for any signs of damage including bending or cracking on the underside of the nozzle
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arm. If this has occurred, the nozzle is NOT SAFE to use and must be replaced. If the steering has been
subject to high loads due to jamming, the nozzle arm should be crack tested using a dye penetrant
procedure, before re-use. If any cracks are found, the nozzle should be replaced.
Steering pivot flanged bushes [10] and pivot sleeves [13]
Inspect the condition of the flanged bushes [10] and pivot sleeves [13], if the radial clearance between
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them is greater than 0.15mm they should be replaced.
O-ring seals [11]
Check the condition of the o-ring seals [11]. These are designed to keep grit out of the bushes. If the o-
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rings are worn or damaged, they should be replaced.
Steering crank bush [15]
Inspect the condition of the steering crank bush [15], if this bush is worn or loose it should be replaced.
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Pivot bolts [12]
Examine the threads and bolt, replace if worn or damaged.
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Nozzle insert [22]
Examine for damage and corrosion. Repair or replace as required.
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Steering crank [4]
Check the condition of the crank ball. Replace the crank [4] if the diameter of the ball has worn below
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20.8mm (0.82ins) (this should be measured at 90º to the shaft axis).
Stepped adjusting washers [14]
Check for wear or damage. Replace if worn or damaged.
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Cotter [5]
Check the condition. Replace if damaged.
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Steering crank bush replacement
To remove the steering crank bush [15] from the nozzle do the following:
With the nozzle removed from the nozzle housing and secured on a workbench, using a hacksaw blade,
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carefully cut out the old steering crank bush [15]. Ensure that the steering crank bore is not scored or
damaged.
Carefully drift out the pieces of the old bush.
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Clean the bore of all old Loctite
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Apply a thin coating of Loctite
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Do NOT apply primer 7471 to the contact face of the bore.
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Apply 680 evenly to the surface of the bore.
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The bore of the boss in the steering nozzle arm is to remain unpainted.
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Loctite primer 7471 must be used to refit the components otherwise the Loctite 680 will not cure.
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There are to be NO dry areas between the bush and the bore once the bush is fitted.
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Insert the replacement steering crank bush [15] from the underside of the nozzle and outwards, ensuring
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that the shoulder of the steering crank bush is hard against the underside of the steering crank before
commencing the swaging operation.
Press the steering crank bush firmly home into the bore until the shoulder of the bush is hard against the
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underside of the steering crank bore.
Rotate the bush when fitting to distribute the Loctite
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Using a suitable form tool or press, swage the new steering crank bush to 100lbs.
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Check that the swaging has been done correctly and that the steering crank bush is not loose.
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Wipe away any excess Loctite
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and primer.
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primer 7471 to the whole surface of the bush and allow to dry.
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and primer/activator.
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9-14
Installation and Service Manual
evenly.