COLLAR-TRACK ROLLER 1787296 - Caterpillar

Hydraulic Schematic For Blade Neutral Position
Illustration 2 g03736387
Blade hydraulic schematic (Blade Neutral)
(1) Delivery line
(2) Blade pump
(3) Pilot pump
(4) Return line
(5) Blade control valve
(7) Pilot control valve
(8) Pilot oil distribution block
(9) Swivel
(11) Blade cylinders
(12) Line
(13) Line relief valves (blade)
(14) Main relief valve (blade)
(15) Unloading valve
(16) Blade control pressure switch
(17) Pilot manifold Blade (10) is attached to the front of the undercarriage. The primary usage of the blade is for leveling work and increasing machine stability.
Illustration 3 g03738076
(1) Delivery line
(4) Return line
(5) Blade control valve
(9) Swivel
Illustration 4 g03737729
(6) Blade control lever
(7) Pilot control valve Blade cylinders (11) are driven by the oil delivery from blade pump (2). The supply oil flows through delivery line (1) to blade control valve (5). Blade control lever (6) controls the movement of blade (10).The control lever controls the following four positions of the blade:
RAISE
LOWER
NEUTRAL
FLOATLeveling work is accomplished by using the mass (weight and size) of the blade in the FLOAT position.Blade cylinders (11) extend or blade cylinders (11) retract by moving the blade control lever. When blade control lever (6) is placed in the NEUTRAL position, oil to blade cylinders (11) is blocked. In this position, blade (10) can be used as a stabilizer. The circuit pressure for the blade is limited by main relief valve (14).Blade Control Valve
Illustration 5 g03737638
Blade control valve
(13) Line relief valves (blade)
(14) Main relief valve (blade)
(18) Return port
(19) Supply port
(20) Pilot port
(21) Port (Head end of blade cylinders)
(22) Port (Rod end of blade cylinders)
(23) Pilot port Blade RAISE
Illustration 6 g03737488
Blade hydraulic schematic (Blade Raise)
(1) Delivery line
(2) Blade pump
(3) Pilot pump
(4) Return line
(5) Blade control valve
(7) Pilot control valve
(8) Pilot oil distribution block
(9) Swivel
(11) Blade cylinders
(12) Line
(13) Line relief valves (blade)
(14) Main relief valve (blade)
(15) Unloading valve
(16) Blade control pressure switch
(17) Pilot manifold When the blade control lever is moved backward to the RAISE position, pilot oil flows from pilot pump (3), through pilot control valve (7) and enters pilot port (23) in blade control valve (5). Blade control valve (5) shifts toward the front of the machine to raise the blade.When blade control valve (5) shifts towards the front of the machine, the oil from blade pump (2) flows through supply line (1). The oil then flows into blade control valve (5), and through swivel (9). The oil flows from swivel (9) to the rod end of blade cylinders (11).Return oil from the head end of blade cylinders (11) flows through swivel (9), through return port (18) and through return line (4) to the hydraulic tank.This action causes the blade to raise.Blade LOWER
Illustration 7 g03737523
Blade hydraulic schematic (Blade Lower)
(1) Delivery line
(2) Blade pump
(3) Pilot pump
(4) Return line
(5) Blade control valve
(7) Pilot control valve
(8) Pilot oil distribution block
(9) Swivel
(11) Blade cylinders
(12) Line
(13) Line relief valves (blade)
(14) Main relief valve (blade)
(15) Unloading valve
(16) Blade control pressure switch
(17) Pilot manifold When the blade control lever is moved forward to the LOWER position, pilot oil flows from pilot pump (3), through pilot control valve and enters pilot port (20) in blade control valve (5). Blade control valve (5) shifts