LINES GP-CAB HEATER 2407887 - Caterpillar

Introduction
Illustration 3 g00754530
Main control valve (front view) (1) Line relief valve (bucket cylinder head end) (2) Bucket control valve (3) Line relief valve (boom cylinder rod end) (4) Boom I control valve (6) Attachment control valve (7) Left travel control valve (8) Straight travel control valve (11) Right travel control valve (12) Swing control valve (14) Stick I control valve (15) Line relief valve (stick cylinder rod end) (16) Line relief valve (stick cylinder head end) (17) Swing boom control valve (18) Line relief valve (swing cylinder rod end) (19) Line relief valve (swing cylinder head end) (22) Main relief valve (25) Line relief valve (boom cylinder head end) (26) Boom drift reduction valve (28) Stick II control valve (30) Boom II control valve (41) Right Body (42) Left BodyMain control valve (9) is located in the hydraulic system between the pumps and actuators (cylinders and motors). Depending on the machine operation, components and passages in the valves control oil flow and pressure in the circuits from the right pump (36), left pump (37) and pilot pump (39) so that the actuators operate in optimum speed and in the correct direction.The main control valve consists of right body (41) and left body (42) .Right Body (41)
The following control valves are in parallel in the right body (41) .
Straight travel control valve (8) .
Right travel control valve (11) .
Swing control valve (12) .
Stick I control valve (14) .
Stick II control valve (28) .
Swing boom control valve (17) .The right pump oil is delivered through inlet port (33), center bypass passage (10) and return port (34) to hydraulic tank (40) .The right body has other important components.
Main relief valve (22) that limits the main hydraulic system pressure.
Line relief valve (stick cylinder rod end) (15) and line relief valve (stick cylinder head end) (16). These line relief valves limit the pressures of the stick circuits.
Stick cylinder drift is reduced by load check valve (13) while the cylinder is in operation.Left Body (42)
The following control valves are in parallel in the left body (42) .
Left travel control valve (7) .
Attachment control valve (6) .
Boom I control valve (4) .
Bucket control valve (2) .
Boom II control valve (30) .The left pump oil is delivered through inlet port (32), center bypass passage (5) and return port (34) to hydraulic tank (40) .The left body has other important components.
Line relief valve (boom cylinder rod end) (3), line relief valve (boom cylinder head end) (25) and line relief valve (bucket cylinder head end) (1) .
Boom drift reduction valve (26) prevents boom cylinder drift, when the main control valve is in the NEUTRAL position.Note: Components in left body (42) function in the same manner as components in right body (41) .The following four configurations are the functions of the main control valve.
The main control valve is in the NEUTRAL position. No load is placed on cylinders and motors.
Individual valve operation
Prevention of cylinder drift with the load check valve.
Limit the circuit pressure with the relief valve operation.The description of