HOSE AS 1U5484 - Caterpillar

Center
Illustration 1 g03712880
(1) Grapple
(2) Port A hydraulic line
(3) Port B hydraulic line
(4) Control valve group (medium pressure function)
(5) Spool
(6) Control valve group (load sensing, medium pressure)
(7) Priority pressure compensator
(8) Pilot pump
(9) Tank Active Port A
Illustration 2 g03713100
(1) Grapple
(2) Port A hydraulic line
(3) Port B hydraulic line
(4) Control valve group (medium pressure function)
(5) Spool
(6) Control valve group (load sensing, medium pressure)
(7) Priority pressure compensator
(8) Pilot pump
(9) Tank Grapple
Hydraulic oil is pumped from the pilot pump (8) to control valve group (6). From control valve group (6) oil travels to valve control group (4) and into spool (5). Spool (5) is shifted up allowing oil to flow through and into hydraulic line (2) leading to grapple (1). Oil flows through grapple (1) causing the grapple to rotate. The oil then returns to tank (9).Active Port B
Illustration 3 g03713197
(1) Grapple
(2) Port A hydraulic line
(3) Port B hydraulic line
(4) Control valve group (medium pressure function)
(5) Spool
(6) Control valve group (load sensing, medium pressure)
(7) Priority pressure compensator
(8) Pilot pump
(9) Tank Grapple
Hydraulic oil is pumped from the pilot pump (8) to control valve group (6). From control valve group (6) oil travels to valve control group (4) and into spool (5). Spool (5) is shifted down allowing oil to flow through and into hydraulic line (3) leading to grapple (1). Oil flows through grapple (1) causing the grapple to rotate. The oil then returns to tank (9).