Trouble Shooting - Cessna SKYMASTER 336 1964 Service Manual

10-60. TROUBLE SHOOTING.
PROBABLE CAUSE ISOLATION PROCEDURE
INDICATION IS FOR OPPOSITE ENGINE.
Electrical wiring reversed at Check continuity to establish
quick-disconnects near pro- correct systems.
peller control levers.
REMEDY
Reverse wiring at quick-
disconnects.
EITHER THRUST WARNING LIGHT ILLUMINATES WHEN THROTTLES ARE
RETARDED TO IDLE POSITION.
Cam not positioned on throttle Cam should not permit system to See paragraph 10-62.
shaft properly. operate at less than 12 inches of
manifold pressure.
EITHER THRUST WARNING LIGHT STAYS ON OR ILLUMINATES WHEN POWER IS
REDUCED AFTER TAKE-OFF.
System too sensitive.
Defective thrust warning switch.
Defective press-to-test switch.
Defective wiring.
Defective switch actuating
mechanism on engine.
Eccentric stop adjusted for in-
correct depth of switch engage-
ment with cam.
Operating cable not adjusted
correctly.
Check continuity.
Check continuity.
Check continuity.
Check visually.
See paragraph 10-62.
See paragra ph 10-62.
Replace switch.
Replace switch.
Repair or replace wiring.
Replace defective parts.
See paragraph 10-62.
EITHER THRUST WARNING LIGHT WILL NOT ILLUMINATE.
Lamp burned out. Check with press-to-test switch.
System not sensitive enough. Operating cable not adjusted
correctly.
Defective thrust warning switch. Check continuity.
Defective wiring. Check continuity.
Defective switch actuating Check visually.
mechanism on engine.
Eccentric stop adjusted for in-
correct depth of switch engage-
ment with cam.
Defective time-delay relay
(rear system only).
See paragraph 10-62.
Substitute known-good relay, or
refer to wiring diagram to check
internal circuit.
Replace lamp.
See paragraph 10-62.
Replace switch.
Repair or replace wiring.
Replace defective parts.
See paragraph 10-62.
Replace relay.
10-24