COVER,WHEEL 1147369 - Caterpillar

Illustration 1 g01183546
Partial hydraulic schematic (1) Undercarriage cylinder (adjustable gauge) (2) Swivel (3) Solenoid valve (4) Blade control valve (5) Main control valve (6) Main pump
Illustration 2 g01183598
Controls for the undercarriage (7) Blade control lever (8) Activation switch for undercarriageActivation switch for undercarriage (8) is located under the armrest on the right side of the machine.Blade control lever (7) is located next to the right joystick. The blade control lever has three positions:
Blade raise
Blade lower
Blade floatOperation
The undercarriage cylinder (adjustable gauge) uses hydraulic oil from the blade function. When an undercarriage cylinder (adjustable gauge) function is desired, switch (8) supplies a signal to solenoid valve (3). Solenoid valve (3) directs the oil flow from the blade circuit to the cylinder for the undercarriage (adjustable gauge).When the operator performs an undercarriage width increase function, the blade control valve is shifted DOWNWARD. Oil from main pump (6) flows through blade control valve (4), to swivel (2) and into the rod end of the cylinder for undercarriage (1). Return oil flows out of the head end through swivel (2), through solenoid valve (3), into blade control valve (4) and back to the hydraulic tank. This causes the cylinder rod to extend. The extending of the cylinder rod causes the tracks to spread. When the operator performs an undercarriage width decrease function, oil flows in the reverse direction of the blade raise function.