SPECIFICATIONS

Vehicle Systems Systems Operation

Systems Operation

Hydraulic System

Basic Schematic

Basic Hydraulic Schematic(Lift Truck With Standard Lift and Full Free Lift Or Full Free Triple Lift)

(1) Lift cylinders (primary for STD, secondary for FFL and FFTL). (2) Excess flow protector (FFL and FFTL).

(3) Lift cylinder (primary for FFL and FFTL). (4) Excess flow protector. (5) Sideshift cylinder (if equipped). (6) Hydraulic control valve.

(7) Flow regulator valve. (8) Tilt cylinders. (9) Relief valve poppet(lift). (10) Hydraulic oil filter. Relief valve poppet(sideshift and tilt).

(12) Hydraulic pump(BC20/25/30S-2) (13) Hydraulic oil tank. (14) Oil line. (15) Priority valve (BC20/25/30S-2)

(16) Oil line to steering gear. (17) Oil line. (18) Hydraulic pump with priority valve (B20/25/30S-2)

Basic Oil Flow

The hydraulic system has hydraulic oil tank (13),

which holds the oil for gear-type hydraulic pump (12).

Hydraulic pump (12) sends pressure oil to the

hydraulic and steering systems. Pump oil flows from

pump (12) to priority valve (15), where the oil flow

divides (BC20/25/30S-2). For B20/25/30S-2 models,

the priority valve is incorporated in hydraulic pump

(18). Part of the oil goes to the steering gear through

line (16). The remaining oil goes to hydraulic control

valve (6) through line (17).

The control valve levers move the valve spools in

control valve (6). The spools direct control valve oil

to lift cylinders (1) and/or (3), tilt cylinders (8) and/or

sideshifter cylinder (5).

16 12

IDCS101S