F 550 4WD Super Duty V10-6.8L VIN S (2000)
12. CAUTION: Input shaft, valve, worm assembly must not be disassembled further. The components were a select fit at assembly and are available
only as part of this subassembly. If disassembled further, the subassembly must be replaced.
Inspect the sealing areas of the input shaft and the valve.
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Check for nicks and run your fingernail edge across the sealing surfaces to detect steps.
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Inspect for discoloration from excess heat.
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Inspect input shaft ball-track grooves for brinelling or spalling.
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If any of these conditions exist, replace the input shaft, valve, worm assembly, valve housing and balls. Also replace the rack piston if
brinelling or spalling is found.
13. NOTE: TAS4O alternate construction: if the spacer sleeve is damaged, replace the input shaft, valve, worm subassembly and use a thick washer
and roller bearing only during reassembly.
Inspect the thrust bearing rollers for any deterioration and the thrust washers for brinelling, spalling, or cracks. Replace any part with these
conditions.
Assembly
1. CAUTION: Do not clamp against the threaded port hole or relief valve hole sealing faces when placing the valve housing in a vise.
Place the valve housing firmly in a vise so the input shaft, valve and worm assembly can be assembled vertically with the worm end up.
