BASE-VALVE COVER 3579803 - Caterpillar

(1) TP-10. IC305C, pin 3, 0.2 sec/DIV sweep.Condition: Move the valve controller knob to slightly open, or close the valve. This oscillogram is of the 33% duty cycle control pulse.(2) TP-11. IC301E, pin 6; 66% duty cycle.(3) TP-11. IC301E, pin 6; 33% duty cycle.Condition: Move the valve controller knob slightly (small amount) open, or close the valve.(4) TP-12 IC306B, pin 1; 66% duty cycle.Condition: Valve closing, caution lamp is on.(5) TP-13. Card edge pin 2 (scope common) and pin 16, motor waveform, vertical sensitivity at 5V/DIV.The center of the scope screen is zero Volts.Condition: Valve motor closing at 66% duty cycle.(6) TP-13. Card edge pin 2 (scope common) and pin 16, motor waveform, vertical sensitivity at 5V/DIV.The center of the scope screen is zero Volts.Condition: Valve stalled in closed position.(7) TP-14. IC307, pin 2; 0.2 sec sweep.Condition: Caution lamp flashing (valve controller knob between 5.5 and 10.0).Parts Lists And Circuit Schematics
For parts that are not serviced by Caterpillar, write or call Flo-Tech, Inc. For repair service, return the Flow Meter, prepaid to:Flo-Tech, Inc.
403 South Washington Blvd.
Mundelein, IL 60060, U.S.A.
Telephone: (312) 566-9120
When returning the Flow Meter to Flo-Tech, Inc. for repair, always give:1. Description of the problem.2. Where to send the unit after repair.3. Name of person to whom the unit is to be returned.4. Billing address, if it is different than the shipping address.Circuit Cards
Power Supply Circuit Card, Schematic And Parts List-Control Units With S/N 1M-18075M
For Parts Service UsePower Supply Circuit Card, Schematic And Parts List - Control Units With S/N 18076M-Up
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Flow Block Schematic And Parts List
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