ENGINE AR 3432960 - Caterpillar

Illustration 4 g00869037
Left console (50) Travel speed control switchDuring partial movements of the travel control lever, the travel speed varies with the travel distance of the lever. Travel speed control switch (50) provides a selection of HIGH or LOW travel speed. When travel speed control switch (50) is placed in the "RABBIT" position, the machine travels in the HIGH speed mode. When travel speed control switch (50) is placed in the "TORTOISE" position, the machine travels in the LOW speed mode. HIGH speed mode is recommended on flat surfaces or on moderate slopes in order to gain high mobility.When HIGH speed ("RABBIT" position) is selected, the travel speed automatically changes. The machine travels at LOW speed when a larger load is present. The machine travels at HIGH speed under a smaller load.
Illustration 5 g00759707
Operation of travel (1) Left travel motor (2) Right travel motor (52) Forward direction (53) Left travel pedal (54) Idler (55) Right travel pedal (56) Cab (57) Reverse directionThe direction of travel is relative to the position of the lower structure. For normal travel, idler (54) is positioned in front of cab (56) and travel motors (1) and (2) to the rear of the cab. With the machine in the normal position of travel, move the travel pedals (53) and (55) forward. The machine will travel in forward direction (52). This movement is called forward travel. When travel pedals (53) and (55) are moved toward the operator, the machine travels in reverse direction (57). This direction is called reverse travel.When cab (56) is turned to the opposite direction, travel motors (1) and (2) will be positioned in front of the cab. The direction of travel and the operation of travel pedals (53) and (55) are reverse when the machine is in the normal travel direction.A pivot turn is made when the travelling direction of the machine is changed. When one of the travel pedals (53) or (55) is moved forward, the respective track travels forward. The machine turns because the stationary track acts as the pivot point. This is called a pivot turn.This machine will spot turn when the travelling direction of the machine is changed in a narrow place. To complete a spot turn operation, move one travel pedal to the rear and the other travel pedal forward at the same time. One track will travel to the rear and the other track will travel forward. The machine will spot turn around the center axis of the machine.Forward Travel Operation
Illustration 6 g00871221
Main control valve compartmentThe storage box is removed for clarity. (32) Left travel control valve (34) Right travel control valveWhen the travel pedals are operated, pilot oil from pilot control valve (37) shifts the stem in travel control valves (32) and (34). Travel control valves (32) and (34) allow oil flow from left pump (41) and right pump (40) to flow to swivel (22). The swivel transfers oil from the rotating upper structure to the lines in the lower structure. The oil flows to left travel