b.Connect the potentiometer or position sensor to the volt meter and power supply as shown in Figures 6, 7 or 8, depending on the model. Note: The power supply needs to be 5 VDC. Do not exceed this voltage.
c.Verify that the closed throttle (idle) output voltage, as a percentage of supply voltage, is within the limits listed in Figure 2. For example, with a supply voltage of 5 volts, for the Caterpillar potentiometer in its closed throttle position, read between 0.5 to 1.0 volts
d.Depress the treadle to its full throttle position. The output voltage, as a percentage of supply voltage, should be within the limits listed in Figure 2. For example, with a supply voltage of 5 volts, for the Caterpillar position sensor in its open throttle position, read between 3.75 to 4.5 volts
e.Make five full applications and record idle position voltage each time. Verify that idle position voltages recorded do not vary by more than .4% (For example, for a 5 volt supply, if there is any variation, the difference between the high and low readings should not exceed .02 volts).
If the electronic treadle fails to function within its specified ranges, it should be repaired or replaced with a new or genuine Bendix remanufactured unit, available at any authorized parts outlet.
Treadle Installation:
ET-S™ Treadle
1.Replace the rubber treadle cover if needed.
2.Place the spring (7) on the treadle pivot pin.
3.Install the nyliner bearing (6) into the treadle. Note: the nyliner bearing collar is placed on the treadle arm side. Holding the spring in position, the treadle is then in- stalled. The nylon washer (4) and retaining ring (3) secure the treadle into position.
4.Make sure the
5.Install the
ET-S2™ Treadle
1.Position the treadle assembly on its side with the poten- tiometer facing up.
2.Insert the nyliner bearing (6) into the treadle arm with the collar up (toward potentiometer side). The nyliner bear- ing (6) will protrude through the treadle arm providing a guide for the treadle spring (7).
3.Place the treadle spring (7) on the protruding portion of the nyliner bearing with the tangs of the treadle spring (7) point- ing toward the
4.Insert the pivot pin from the potentiometer side of the
5.Make sure the
6.Install the
ET-S™ & ET-S2™ TREADLE INSTALLATION
1.Using the mounting hardware set aside, install the assembled electronic treadle on the vehicle. Torque to between 85 and 110 lb. in.
2.Reconnect the cable connector by plugging it into the potentiometer’s integral connector and pushing until the lock tab snaps into place.
WARNING! PLEASE READ AND FOLLOW THESE INSTRUCTIONS TO AVOID PERSONAL INJURY OR DEATH:
When working on or around a vehicle, the following general precautions should be observed at all times.
1.Park the vehicle on a level surface, apply the parking brakes, and always block the wheels. Always wear safety glasses.
2.Stop the engine and remove ignition key when working under or around the vehicle. When working in the engine compartment, the engine should be shut off and the ignition key should be removed. Where circumstances require that the engine be in operation, EXTREME CAUTION should be used to prevent personal injury resulting from contact with moving, rotating, leaking, heated or electrically charged components.
3.Do not attempt to install, remove, disassemble or assemble a component until you have read and thoroughly understand the recommended procedures. Use only the proper tools and observe all precautions pertaining to use of those tools.
4.If the work is being performed on the vehicle’s air brake system, or any auxiliary pressurized air systems, make certain to drain the air pressure from all reservoirs before beginning ANY work on the vehicle. If the vehicle is equipped with an
5.Following the vehicle manufacturer’s recommended procedures, deactivate the electrical system in a manner that safely removes all electrical power from the vehicle.
6.Never exceed manufacturer’s recommended pressures.
7.Never connect or disconnect a hose or line containing pressure; it may whip. Never remove a component or plug unless you are certain all system pressure has been depleted.
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