Checking And Adjusting Microsw1tches On Throttle Housing

2. Check microswitch A (idle contact).

a) Place degree disc of special tool P 228 c on operating lever.

1, Remove throttle housing.

2. Check microswitch A (idle contact).

3. Check microswitch B (Full throttle contact).

Note

The microswitch will already switch when play in accelerator linkage is eliminated by force on the pedal. The throttle valve should still be closed.

Connect a standard buzzer or ohmmeter on both contacts of microswitch. Power must be flowing through microswitch; adjust if necessary.

b) Mount and align (locally made) indicator.

J.—f c) Operate throttle 30° - 4°. Microswitch must close; adjust if necessary.

Checking and Adjusting Microswitches on Throttle Housing

CHECKING TEMPERATURE SENSOR II (gray plug)

CHECKING TEMPERATURE TIME SWITCH (FOR COLD START VALVE) (brown plug)

Measure resistance direct off of temperature sensor.

1. Pull off plug and measure resistance direct off of temperature time switch.

Check by measuring resistance between

1. Pull off plug and measure resistance direct off of temperature time switch.

Check by measuring resistance between terminal "G" and "ground" (housing); below + 30° C/86° F: 0 ohms above + 40° C/104° F: 100 - 160 ohms

Measure resistance direct off of temperature sensor.

For - 10° C/14° F 7 ,.. 12 k-ohms + 20°C/68°F 2 ... 3 k-ohms + 80° C/176°F 250 ... 400 ohms

Replace, if necessary. terminal "W" and "ground" (housing):

below + 30° C/86° F: 0 ohms above + 40° C/104° F: 100 - 160 ohms terminal "G" and terminal "W": below + 30° C/86° F: 25 - 40 ohms above + 40° C/104° F: 50 - 80 ohms

Note

Temperatures above + 40 C/104° F and below + 30° C/86° F can be produced with water of pertinent temperature.

Printed in Germany - IV, 1980 Checking Temperature Sensor II 24- 17

Checking Temperature Time Switch (for Cold Start Valve)

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