Description; Trouble Shooting; Cylinder Head Temperature Gage - Cessna 188 Series Service Manual

MODEL 188 & T188 SERIES SERVICE MANUAL
15-24. TROUBLE SHOOTING (Cont).
TROUBLE
PROBABLE CAUSE REMEDY
IMPROPER CALIBRATION.
Faulty mechanism.
Replace instrument.
NO POINTER MOVEMENT.
Faulty mechanism.
Replace nstrument.
Broken pressure line.
Repair or replace damaged
line.
15-25. CYLINDER HEAD TEMPERATURE GAGE.
NOTE
15-26.
DESCRPTION. The temperature bulb reg-
A Cylinder Head Temperature Gage Calibr-
ulates electrical power through the cylinder head
tion Unit, (SK182-43) is available and may be
temperature gage.
The gage and bulb require little
ordered through the Cessna Supply Division.
or no maintenance other than cleaning, making sure
lead is properly supported and all connections are
clean, tight and properly insulated.
15-27. TROUBLE SHOOTING.
TROUBLE
PROBABLE CAUSE
REMEDY
GAGE INOPERATIVE.
No current to circuit.
Repair electrical circuit.
Defective gage, bulb or
Repair or replace defective
circuit. items.
GAGE FLUCTUATES
Loose or broken wire per-
Repair or replace defective
RAPIDLY. mitting alternate make and
wire.
break of gage circuit.
GAGE READS TOO HIGH High voltage.
Check "A" terminal.
ON SCALE.
Gage off calibration.
Replace gage.
GAGE READS TOO LOW
Low voltage. Check voltage supply and
ON SCALE.
"D" terminal.
Gage off calibration.
Replace gage.
GAGE READS OFF SCALE
Break in bulb.
Replace bulb.
AT HIGH END.
Break in bulb lead.
Replace bulb.
Internal break in gage.
Replace gage.
OBVIOUSLY INCORRECT
Defective gage Deme
Replace gage.
READING.
Incorrect calibration.
Calibrate system.
Revision 1 15-9