BENDIX ET-2 ELECTRONIC THROTTLE Manuel - Page 6

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DIODES

IDLE

VALIDATION

SWITCH

PEDAL

POSITION

SENSOR

™

FIGURE 8 - ET-2

TREADLE ELECTRICAL TEST SCHEMATIC FOR THE CUMMINS CONNECTOR

INSTALLATION

1. Install the assembled ET-2

2. Reconnect the cable connector by plugging it into the

potentiometer's integral connector and pushing until

the lock tab snaps into place.

DISASSEMBLY

The following instructions present a major disassembly of

the ET-2

™

treadle. They are included for reference only.

Several replacement parts and maintenance kits that do

not require full disassembly are available. The instructions

provided with those items should be followed in lieu of the

steps presented here. Refer to Figure 4 throughout the

procedures.

1. Remove the treadle cover (1).

2. Remove the pivot pin's snap ring (8).

3. Remove the pivot pin (9) and the two nyliner bearings

(10) from the treadle's exterior. Also remove the two

nyliner bearings (10) from the mounting base.

4. Remove the pivot spring (11).

5. Remove the screws (3) that secure the potentiometer

(2) to the treadle. Remove the potentiometer.

6. Remove the lever shaft's snap ring (5).

7. Remove the lever shaft (4) and the washer (7). Then

remove the roller assembly (15), the inner washer (5),

and the nyliner bearing (6) from the treadle. Separate

the treadle from the mounting base.

TEST

LOAD

470

OHM

PIN 6

PIN 2

PIN 1

PIN 5

PIN 3

.01µ F

PIN 4

TEST LOAD

47000 OHM

™

treadle on the vehicle.

Closed Throttle (open) Range: 5-17%

SUPPLY

Open Throttle (full) Range: 70-81%

VOLTAGE

V3 (LOGIC HIGH AT IDLE)

V2 (LOGIC LOW AT IDLE)

IVS GROUND

APS GROUND

SUPPLY

VOLTAGE

(OUTPUT)

APS

GROUND

(OUTPUT) SIG1

8. The roller assembly consists of the lever, roller, two

springs (12 & 13), and a spring support (14). Remove

the springs and the spring support from the lever.

CLEANING & INSPECTION

1. Use mineral spirits or an equivalent solvent to clean all

metal parts. Be sure to thoroughly dry the parts.

2. Inspect the treadle and mounting base for severe

corrosion, pitting, or cracks. Replace as necessary.

Superficial corrosion and/or pitting is acceptable.

3. Inspect the cable assembly for loose or frayed wires,

physical damage, or any contaminants on the

connectors. Check end-tend electrical continuity at

terminals. Replace as necessary.

ASSEMBLY

Refer to Figure 4 throughout the assembly procedure.

1. Install the four nyliner bearings (10) on the mounting

base and treadle.

2. Place the treadle "ears" outside the mounting base

"ears" so that the holes line up.

3. Install the pivot spring (11) into the base and treadle.

The curved end of the spring fits into a small hole in the

treadle, and the straight end fits into a small hole in the

mounting base.

4. The pivot pin (9) should slide through the holes in the

"ears" of the treadle and base assembly, then through

the center of the spring. Secure the pin with its snap

ring (8). Make sure the pivot spring is straight and is

seated in its holes.

LOCK TAB

(INPUT)

IVS GROUND

(IVS) V 2

POTENTIOMETER

SET VOLTAGE

AND PC. NO.

SHOWN

HERE

(IVS)

V 3

LOCK TAB