3500B Engines Caterpillar

The throttle switch provides the operator with the ability to select the desired engine rpm. The throttle switch is a rotary switch with ten positions. The throttle switch is located near the right armrest of the cab seat. The throttle switch allows the operator to select engine rpm from 725 rpm to 1830 rpm. Refer to Table 1.

Table 1

Switch Position	Approximate Desired Engine Speed
1	725 rpm
2	840 rpm
3	970 rpm
4	1100 rpm
5	1230 rpm
6	1360 rpm
7	1490 rpm
8	1620 rpm
9	1750 rpm
10	1830 rpm

The throttle switch works in conjunction with the automatic engine speed control switch. The "AESC" switch will automatically return the engine to low idle when work is not being performed. If the throttle switch fails, the "AESC" switch functions as a backup throttle.