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Cleaning and Inspection (cont) - TM-5-4210-233-14P-1_893
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TM-5-4210-233-14P-1 Twin Agent 4x4 Firefighting Truck Model No. CM-KFT-B Manual
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STEERING GEAR (illustration)
TM 5-4210-233-14&P-1 5-39.  STEERING GEAR-Continued (9)   Inspect the sector shaft (2) bearing and sealing areas and sector teeth contact surfaces for brinelling or spalling.  Run your fingernail edge across these areas to detect steps.  Inspect also for cracks.  Remove any masking tape from the shaft serrations and inspect for twisted or otherwise damaged serrations.  If any of these conditions exist, replace the sector shaft. (10) Inspect the sector shaft assembly for damaged adjusting screw (8) threads.  The staked retainer (24) must be locked in place, and have no cracks.  The adjusting screw must rotate by hand with no perceptible end play (lash).  Replace adjusting screw, if damaged.  Replace the retainer, if damaged, or if the adjusting screw requires replacement or adjustment. (11) Inspect the thrust bearing (39) rollers for any deterioration.  Inspect the two thrust washers (38) for brinelling, spalling, or cracks.  Replace any part with these conditions. c. Assembly. CAUTION Be sure the compression tool is assembled correctly before assembly of the seal ring.  If the tool is backwards it cannot be pulled over the new seal ring for compression or for tool removal without destroying the seal ring. Allow  for  the  10  minutes  to  insure  that  the  O-ring  and  seal are properly seated when you install the worm shaft into the rack piston.  If you do not allow for this time, the seal may tear or be cut when you place the worm into the rack. (1)   Slide compression tool (Appendix B, Section III, Item 83), small diameter end first, onto the worm end of worm shaft/input shaft (1) until it is beyond the seal ring groove.  Using seal installation tool (Appendix B, Section III, Item 84), assemble the new worm shaft O-ring (55), and then the new seal ring (54).  Next, compress the seal ring.  Allow the worm shaft/input shaft to set with compression tool in place for at least ten minutes. CAUTION The bearing rolls must be in place to insure proper installation of the  bearing.    If  the  rolls  are  improperly  installed,  the  bearing race  may  collapse  and  fail.    The  flange  may  break,  causing premature failure of the bearing.  Again, do not mix the housing bearing  rolls  with  the  side  cover  bearing  rolls.    Be  sure  the bearing mandrel used is clean. (2)   If you are installing a new housing bearing (16) or using the old housing and bearing assembly, apply a generous amount of clean grease to the bearing race to retain the bearing rolls.  Then, place the rolls into the race, being sure you have the correct quantity of rolls for your particular bearing assembly.  To install the NEW bearing assembly (1 6) into the housing, first install the retaining ring (61) into the groove on the bearing's outside diameter.  Then press the bearing into the housing from the trunnion side using bearing mandrel (Appendix B, Section III, Item 88) against the lettered end of the bearing shell that the retaining ring is away from the housing bore.  During this procedure be sure that the housing is square with press base and the bearing is not cocked. 5-224

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