FRAME GP-TELESCOPING RECOIL 3512682 - Caterpillar

Illustration 1 g01232828
Valve bank
(A) Boom
(B) Swing
(C) Stabilizer (left)
(D) Stabilizer (right)
(E) Tank
(F) "A" ports
(G) "B" ports
(H) "Thumb / auxiliary"
(J) Stick
(K) Bucket
(L) Pump
(M) Slide lock
Table 1
Functions of the Control Valve
Function "A" Port "B" Port
BOOM UP DOWN
SWING RIGHT LEFT
LH STABILIZER DOWN UP
RH STABILIZER DOWN UP
BUCKET CURL DUMP
STICK IN OUT
AUX "-" FLOW (OPEN THUMB) "+" FLOW (CLOSE THUMB)
or
Primary flow for a hammer
Illustration 2 g06205538
Schematic
(1) Hydraulic line (pump)
(2) Sideshift lock cylinders
(4) Boom cylinder
(5) Swing cylinders
(6) Stabilizer cylinder (left)
(7) Stabilizer cylinder (right)
(8) Bucket cylinder
(10) Stick cylinder
(11) Thumb cylinder (auxiliary)
(12) Outlet for the tank
(13) Shut off valve for sideshift lock cylinders
(14) Relief valve 25000 kPa (3626 psi)
(15) Relief valve 20000 kPa (2900 psi)
(16) Relief valve 23000 kPa (3335 psi)
(17) Relief valve 23000 kPa (3335 psi)
(18) Relief valve 30000 kPa (4351 psi)
(19) Relief valve 30000 kPa (4351 psi)
(20) Relief valve 25000 kPa (3626 psi)
(21) Relief valve 25000 kPa (3626 psi)
(22) Relief valve 30000 kPa (4351 psi)
(23) Relief valve 30000 kPa (4351 psi)
(24) Check valve
(25) Orifice 1 mm (0.0394 inch)
(26) Flow control valve (spool)
(27) Flow control valve (spool)The main control valve is located in the hydraulic system between the machine's auxiliary hydraulic system and the hydraulic cylinders. According to the machine operation, components in the main control valve control the flow of the hydraulic oil. In this way, the operating speed and directions of the cylinders are changed, and the pressure of the hydraulic oil is controlled.The major valves in the main control valve have the following functions:Control in the NEUTRAL position - When the joysticks are in the NEUTRAL position, oil passes through the center bypass passage in the main control valve. The oil is exhausted through return port (12).Operation of individual valves - Individual valves (spools) are used in extending the cylinder rods and retracting the cylinder rods. Hydraulic oil is supplied to the valves through the center bypass passage and the parallel feeder passages.Prevention of leakage and drift in cylinders - This function is performed through the use of load check valves.Limitation of circuit pressure - This function is performed through the use of relief valves.