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DESCRIPTION (cont) - TM-5-4210-230-14P-1_975
TRUCK SERVICE MANUAL TM 5-4210-230-14&P-1 STEERING GEAR DESCRIPTION This steering gear (Fig.  1) is a fully integral power steering  unit  incorporating  a  hydraulic  control  valve,  a hydraulic     power     cylinder     and     a     manual     steering mechanism into a single compact package.  The control valve  is  a  rotary  design  which  combines  simplicity  of construction  with  desirable  performance  characteristics. Flow of oil from an engine driven pump is directed to the power cylinder by the control valve. Fig.  2 DISASSEMBLY (For callouts, refer to Fig.  1) Thoroughly    clean    off    all    outside    dirt    before disconnecting   hoses.      (Port   holes   should   be   plugged immediately    after    disconnecting    hoses    and    before removing from the vehicle.) All parts should be cleaned in clear, clean solvent and  blown  dry  with  air.    Keep  each  part  separate  to avoid nicks and burrs. IMPORTANT Avoid wiping valve parts with cloth, as lint may actually    cause    binding    and    sticking    of    the closely  fitted  parts.  Never  steam  clean  or  high pressure wash hydraulic steering gear assemblies.  Do not force or abuse closely fitted parts, as damage may result. 1.   Position steering gear in a vise with worm shaft (17) in a horizontal position.  Check timing mark located on end of sector shaft (50), position this mark in vertical direction with steering gear in center of steering gear travel. Fig.  3 2.   Remove any paint or corrosion from serrated end of sector shaft (50) and loosen jam nut (59) on sector shaft adjusting screw (51). 3.   To drain steering gear fluid remove six "special ring head" bolts (61) from side cover (58).  These bolts have a special ring located on bolt head for sealing purposes, if these bolts are replaced, they must be replaced with same "special" type and length of bolt. 4.   Remove side cover (58) and sector shaft (50).  A soft hammer or wooden handle may be used to remove sector shaft (Fig.  4). Fig.  4 CTS-2717  Page 3 PRINTED IN UNITED STATES OF AMERICA

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