DRIVE AR-SWING 3707637 - Caterpillar

Illustration 1 g03702123
Pilot oil manifold
(1) Pilot oil manifold (attached to main control valve)
(2) Solenoid valve for hydraulic lockout
Illustration 2 g03348591
Cab
(3) Hydraulic lockout lever (LOCKED position)
Illustration 3 g03348587
Cab
(3) Hydraulic lockout lever (UNLOCKED position)
Illustration 4 g03348588
(3) Hydraulic lockout lever
(4) Switch Switch (4) is located on a bracket with hydraulic lockout lever (3). The plunger is activated by hydraulic lockout lever (3).When hydraulic lockout lever (3) is shifted to the LOCKED position, solenoid valve (2) of pilot oil manifold (1) is not energized. Pilot oil is not supplied to the pilot control valves. Thus when the joysticks and/or the travel levers/pedals are operated, the cylinders or the motors are not activated also. The engine will not start unless hydraulic lockout lever (3) is in the LOCKED position. If someone unexpectedly operates the machine, the machine will not operate.When hydraulic lockout lever (3) is placed in the UNLOCKED position, solenoid valve (2) is energized and pilot oil passes through the solenoid valve. Pilot oil now flows to the pilot control valves.
Illustration 5 g03348590
Pilot manifold (hydraulic activation control valve)
(2) Solenoid valve
(5) Spool
(6) Spring
(7) Passage
(8) Line When hydraulic lockout lever (3) is placed in the UNLOCKED position, solenoid valve (2) is energized. This action moves spool (5) to the left against the force of spring (6) and allows passage (7) to open. Pilot pressure oil flows through passage (7) and line (8) to the pilot control valves (joysticks and travel levers/pedals).Switch (4) is turned ON by moving lever (3) down into the UNLOCKED position.When hydraulic lockout lever (3) is in the LOCKED position, solenoid valve (2) is de-energized. Spool (5) returns up by the force of spring (6). Passage (7) opens. Oil in passage (7) drains. Pilot oil supply to line (8) is stopped. Pilot oil supply to the pilot control valves (joysticks and travel levers/pedals) is blocked. The cylinders and the motors cannot be activated.With the hydraulic activation control lever (3) in the LOCKED position, switch (4) will turn OFF.The engine start switch can only be operated when switch (4) is in the OFF position and hydraulic lockout lever (3) is in the LOCKED position.