CONE-BEARING 3973001 - Caterpillar

The direction of travel is relative to the position of the lower structure. For normal travel, idlers (44) are positioned in front of cab (46). Travel motors (12) and (28) are positioned to the rear of the cab. With the machine in the normal position of travel, depress the top of the travel pedals (41) and (42). The machine will travel in forward direction (45). When the bottom of the travel pedals (41) and (42) are depressed the machine travels in reverse direction (47) .When cab (46) is rotated by 180 degrees, travel motors (12) and (28) are positioned in front of the cab. The direction of travel and the operation of the travel pedals (41) and (42) are reversed from the normal travel direction.When the machine is in the normal position of travel and when one of the travel pedals (41) or (42) 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 in order to change the travel direction of the machine in a narrow space. To complete a spot turn operation, move one travel lever/pedal to the rear and move the other travel lever/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
Illustration 6 g01069885
Travel Control Valve (5) Travel control valve (6) Proportional solenoid valves (7) Proportional solenoid valves (9) Travel control valve (left) (10) Travel control valve (right)Move the hydraulic lockout to the UNLOCKED position. This allows the pilot system oil to flow to proportional solenoid valves (6) and (7) .When both of the travel pedals are operated in the FORWARD TRAVEL position, a signal is sent to the IQAN control system. The IQAN control system sends a signal that energizes proportional solenoid valves (6) and (7). The proportional solenoid valves for forward travel are energized. The pilot system oil pressure flows from proportional solenoid valves (6) and (7) to left travel control valve (9) and right travel control valve (10). The pilot system oil pressure shifts the spools in both of the travel control valves. The travel control valves allow the pump oil from left pump (8A) and right pump (8B) to flow to swivel (11). The swivel transfers the pump oil from the rotating upper structure to the lines in the lower structure.