YOKE AS 1085732 - Caterpillar

Do not use aerosol types of starting aids such as ether. Such use could result in an explosion and personal injury.
Engage the parking brake.
Move the direction control lever into NEUTRAL.
Move the control levers to the HOLD position.
Illustration 1 g00677059
Depress the top of the thermal starting aid switch. The light bar inside the switch will light.
Illustration 2 g00688646
Wait until the light bar inside the switch goes out. Turn the engine start switch key in order to engage the starter motor. Do not crank the engine for more than 30 seconds.
If the engine does not start, release the engine start switch key in order to disengage the starter motor. Repeat Steps 4 and 5.When the engine starts, continue to depress the starting aid switch until the engine runs evenly. Do not depress the starting aid switch for more than 30 seconds after the engine starts.