2006/11/20 Caterpillar

Articulated Truck:

D350E (S/N: 9LR1-UP)

D400 (S/N: 1MD1-UP)

D400D (S/N: 8TF1-UP; 4EJ1-UP)

D400E (S/N: 2YR1-UP)

D40D (S/N: 2JJ1-UP)

Service Magazine, SEPD0154, 17 May 1993, "Speedometer Accuracy Improved". Disregard this article. Refer to the following article.

Description of Change: The accuracy of the speedometer has been improved by using two plugs in the transfer gear. The plugs act as pickup points for the sensor. Formerly, two holes in the transfer gear were used as pickup points for the sensor.

Adaptable To: The 2U-6795 Plugs are effective with D40D (S/N: 2JJ88-UP), D400D (S/N: 8TF408-UP; 4EJ21-UP), D350E (S/N: 9LR1-UP) and D400E (S/N: 2YR1-UP) Articulated Trucks. The accuracy of the sensor of the earlier D40D, D400D and D400 Articulated Trucks can be improved by installing the plugs. Refer to "Installation of 2U-6795 Plugs ".

When you service the sensor, refer to "Adjusting and Installing the Sensor".

Installation of 2U-6795 Plugs

Illustration 1	g01316921
Typical example of sensor location for the D40D, D400D and D400 (1) Cover (2) Jam Nut (3) Sensor (4) 2U-6795 Plugs (5) Input Gear

1. Loosen jam nut (2) and remove the sensor (3) .

2. Remove the shim pack together with cover (1) .

3. Clean all traces of oil from the face of input gear (5). Be sure to thoroughly clean holes (A) .

4. Apply 6V-1541 Quick Cure Primer and 9S-3265 Compound on 2U-6795 Plugs (4). Install the plugs in holes (A) .

5. Install cover (1) and the shim pack.

6. Reinstall sensor (3). Refer to "Adjusting and Installing the Sensor".

Adjusting and Installing the Sensor

Illustration 2	g01317310
Typical example of sensor location for the D40D, D400D and D400 (1) Cover (2) Jam Nut (3) Sensor (4) Plug

Illustration 3	g01317009
Typical example of sensor location for the D350E and D400E (1) Cover (2) Jam Nut (3) Sensor (4) Plug

1. Block the trailer wheel.

2. Raise one tractor wheel off the ground and block the frame.

3. Turn the wheel until one of plugs (4) is opposite the hole for the sensor in cover (1) .

4. Carefully install sensor (3) into the hole in cover (1) until the sensor contacts plug (4). Wind the sensor one turn away from the plug and tighten jam nut (2) .