TUBE AS 4234987 - Caterpillar

Illustration 1 g03561127
Main control valve schematic (1) Main control valve (2) Tilt valve (3) Lift Valve (4) Third valve auxiliary (5) Fourth valve auxiliary (6) Load sense valve (914K only) (7) Main relief valve (8) Pilot pressure Inlet (9) Load sense line (914K only) (10) Out to tank line (11) Pump pressure Inlet (12 ) Load sense lines (A) Tilt cylinder rod end (B) Tilt cylinder head end (C) Lift cylinders rod end (D) Lift cylinders head end (E) Third auxiliary forward (F) Third auxiliary reverse (G) Fourth auxiliary forward (H) Fourth auxiliary reverse
Illustration 2 g03561128
Main control valve (A) Left view (B) Right View (1) Main control valve (2) Tilt valve (3) Lift Valve (4) Third valve auxiliary (5) Fourth valve auxiliary (6) Load sense valve (7) Main relief valve (8) Pilot pressure Inlet (9) Load sense line (10) Out to tank line (11) Pump pressure Inlet (12) Dead engine lower (A) Tilt cylinder rod end (B) Tilt cylinder head end (C) Lift cylinders rod end (D) Lift cylinders head end (E) Third auxiliary forward (F) Third auxiliary reverse (G) Fourth auxiliary forward (H) Fourth auxiliary reverseThe pilot valve controls the bank valve. Refer to Systems Operation, "Pilot Hydraulic System", for information on the operation of the pilot valve. The bank valve is sometimes referred to as the implement control valve. Oil flows from the implement pump to the bank valve. The bank valve controls the following components: auxiliary hydraulics, tilt cylinder and lift cylinder. The main relief valve is located within the inlet housing. The main relief valve controls the maximum pressure of the hydraulic system.