IGNITION SWITCH

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IGNITION SWITCH - INSPECTION/CHECK
 Inspection and lubrication procedures -  ACS brand ignition switch - every 2000 hours.
Switch Removal.
(1) Disconnect battery.
(2) Remove switch assembly from instrument panel by loosening locknut on the forward side of panel and removing decorative nut on aft side of panel.
NOTE: Wiring need not be removed from posts of switch if wiring is of sufficient length to allow switch assembly to be moved to a position where disassembly can be accomplished. If wiring is to be disconnected, tag or mark wires for reinstallation.
B. Switch Disassembly.
(1) Hold switch body in position.
(2) Remove screws and washers.
(3) Lift terminal board assembly from body, being careful not to lose springs and cups.
C. Switch Cleaning.
(1) Clean switch contacts and the three movable contact cups using alcohol on a cotton tip swab.
D. Switch Inspection.
(1) Inspect movable contact cups and switch contacts on the terminal board assembly for excessive wear or corrosion and for loose contacts or terminals. If the silver plating on the contact cups is worn through to the brass material, or they are burned or pitted from arcing or are corroded, they should be replaced. If the contacts on the contact block exhibit any of the above conditions or the terminals are loose, the terminal board assembly should be replaced.
E. Switch Reassembly.
(1) Apply a thin coating of Luberex 10-1206 lubricant to switch contacts and the three movable contact
cups. Ensure all contact areas are covered with lubricant.
(2) Reassemble switch using new parts, if required. Ensure that cups and springs are positioned in switch body so that no binding occurs. Secure terminal board assembly to switch body with retained washers and screws.
(3) Mark switch with a dab of red paint on the terminal board retaining screws.
(4) If removed, reconnect wiring to backside of switch.
(5) Install switch in panel and secure using existing hardware.
(6) Reconnect battery and perform an operational check of the switch.
Operational Check.
(1) Start engine.
(2) Check magnetos for normal engine RPM drop.
(3) Verify that both magnetos are grounded when switch is in the OFF position.
(a) Reduce engine RPM to idle, and turn switch to the OFF position. Engine should quit immediately, signifying that both magnetos have been grounded through the ignition switch.
(4) After engine stops, move mixture control to idle cutoff position.

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