5-76. STEERING CONTROL UNIT REPAIR (CONT).
(12) Remove setscrew (25) from control unit
(13) Install machine screw into end of check ball
seat (26); using screw, pull seat from control
unit housing (4).
(14) Remove and discard two preformed
packings (27) from check ball seat (26).
Discard preformed packings.
(15) Tip control unit housing (4) and remove
check ball (28) and check ball retainer (29).
Drycleaning solvent (P-D-680) is TOXIC and flammable. Wear protective goggles and gloves; use
only in a well-ventilated area; avoid contact with skin, eyes, and clothes and do not breathe vapors.
Keep away from heat of flame. Never smoke when using solvent; the flash point for type I
drycleaning solvent is 100°F (38°C) and for type II is 140°F (60°C). Failure to do so may result in
injury or death to personnel.
If personnel become dizzy while using cleaning solvent, immediately get fresh air and medical help.
If solvent contacts skin or clothes, flush with cold water. If solvent contacts eyes, immediately flush
eyes with water and get immediate medical attention.
(1) Clean all metal parts with drycleaning solvent.
Compressed air used for cleaning purposes must not exceed 30 psi (207 kPa). Use only with effective
chip guarding and personal protective equipment (goggles/shields, gloves, etc.).
Use compressed air to dry all parts except bearings.