2003/03/03 Caterpillar

New Automatic Brake Application Switches Available {1408}

Usage:

Load Haul Dump: R1700 II (S/N: 4LZ)

Elphinstone Service Magazine, 9EP3441, 31 October 1999, "New Automatic Brake Application Switches Available."Service Magazine, SEPD0628, 6 May 2002, "New Automatic Brake Application Switches Available"

Description of Change: The automatic brake application switches shown in the above supplements have been revised. See the replacement supplement that follows.

The following pressure switches have changed: The Alert Indicator switches and the Brake Application switches. The new Alert Indicator switches and the new Brake Application switches have a different specification to the former switches.

The former switches must not be intermixed with the new switches.

Adaptable To: The new 1DE3524 Pressure Switch is a replacement for the following former switches: 9W-2653 Pressure Switch and the 1DE2746 Pressure Switch. The new 1DE3523 Pressure Switch is a replacement for the following former switches: 1DE1039 Pressure Switch and the 175-3245 Pressure Switch. The new 1DE3524 Pressure Switch and the new 1DE3523 Pressure Switch is adaptable to R1700-127 and Up. Refer to Table 1 and Illustration 1 for details.

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Table 1
Machine Model: R1700 II
Qty	New Switch Part Number	Description	Former Switch Part Numbers
2	1DE3524	Pressure Switch	9W-2653 or 1DE2746
2	1DE3523	Pressure Switch	1DE1039 or 175-3245

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Illustration 1	g00886040
View of the brake accumulators (A) Location of the brake low oil pressure switches (1) 1DE3524 Pressure Switch (Alert Indicator) (2) 1DE3523 Pressure Switch (Brake Application)

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