2006/06/26 Caterpillar

The Addition of Spacer Plates Avoids Contact Between Ejector Frames and End Plates {6203, 7271}

Usage:

740 AZZ

Articulated Truck: 740 EJECTOR (S/N: AZZ1-UP; B1R1-213)

Service Magazine SEPD0843, 26 June 2006, "The Addition of Spacer Plates Avoids Contact Between Ejector Frames and End Plates". Disregard the existing article. Refer to the following information.

In extreme circumstances, it is possible that the ejector frames of the ejector blade might contact the end plates at the ends of the rails for the ejector blade. Any contact between the end plates and the ejector frames is not a normal operating condition and any contact might result in damage to the end plates.

In order to avoid contact between the ejector frames and the end plates, spacer plates should be installed behind the end plates. The spacer plates will extend the position of the end plates.

Perform the following steps in order to install spacer plates onto each of the rails for the ejector blade. Before conducting the installation procedure, ensure that you understand the procedure and all the parts that are required. In order to perform the procedure, you must fabricate two spacer plates. Refer to "Fabrication of Spacer Plates".

Show/hide table




Illustration 1	g01286047

Remove plate (1), bolts (2) and washers (3) on one side of the machine. Inspect the 173-6854 Plate (END) and 9X-8257 Washers. If the parts are damaged, replace the parts with new Caterpillar parts.

Show/hide table




Illustration 2	g01286046

Install spacer plate (4). Temporarily secure the parts with bolts (2) and washers (3) .

Weld spacer plate (4) in place. Refer to Illustration 2 and Table 1.
Show/hide table
Table 1
Welding Information

A
8 mm (0.32 inch) Butt Weld (Two Places)

Table 1
Welding Information
A	8 mm (0.32 inch) Butt Weld (Two Places)

Remove bolts (2) and washers (3) from spacer plate (4). Discard the bolts.

Show/hide table




Illustration 3	g01286045

Install plate (1) to spacer plate (4) with new 168-7789 Bolts (5) and washers (3) .

Rework the other side of the machine.

Note: On later machines 740 Ejector (S/N: B1R214-UP), this problem has been avoided by increasing the length of the rails for the ejector blade.

Fabrication of Spacer Plates

Show/hide table




Illustration 4	g01280930

Fabricate two spacer plates from 15 mm (0.60 inch) mild steel. Refer to Illustration 4 and Table 2.

Show/hide table

Table 2
Dimensions for Spacer Plate
B	60 mm (2.36 inch)
C	30 ± 1 mm (1.18 ± 0.04 inch)
D	90 mm (3.54 inch)
E	70 mm (2.76 inch)
F	20 mm (0.79 inch)
G	18 mm (0.71 inch) Holes (Two positions)
H	9 ± 1 mm (0.35 ± 0.04 inch) x 45° Chamfer
J	H on a 9A-1593 Comparison Gauge (SURFACE TEXTURE)