SPECIFICATIONS

ManualsBrandsDoosan ManualsOtherSpecifications Systems Operation Testing & Adjusting (part 2)

Vehicle Systems Testing And Adjusting

Hydraulic System

Relief Valve Pressure Check

Use the Pressure Gauge Kit to check the relief valve

pressure.

Hydraulic oil, under pressure can remain in the

hydraulic system after the engine and pump have

been stopped. Personal injury can be caused if

this pressure is not released before any work is

done on the hydraulic system. To prevent possible

injury, lower the carriage to the ground, turn the

key switch off and move the control levers to

make sure all hydraulic pressure is released

before any fitting, plug, hose or component is

loosened, tightened, removed or adjusted. Always

move the lift truck to a clean and level location

away from the travel of other machines. Be sure that

other personnel are not near the machine when the

engine is running and tests or adjustments are

made.

Pressure Tap Location

(1) Cap (2) Nipple assembly.

With the key switch off, remove cap (1) from nipple

assembly (2) and connect the 28000 kpa (4000 psi)

gauge to the nipple assembly.

Lift Relief Valve Check and Adjustment

1. Turn the key switch on and activate the hydraulics

until the hydraulic oil is at the normal operating

temperature.

2. With the motor at fast rpm under unload condition,

hold the lift control lever in the lift up position and

watch the gauge. The gauge indication is the pres-

sure that opens the relief valve at the end of lift

cylinder stroke.

3. The correct pressure setting is shown in the chart.

4. If an adjustment to the relief valve setting is nec-

essary, loosen locknut (3).

Relief Valve Adjustment

(3) Locknut. (4) Stud

5. Turn stud (4) clockwise to increase or counterclock-

wise to decrease the pressure setting of the relief

valve.

6. Tighten the locknut and check the pressure setting

again for correct adjustment.

Relief Valve Pressure

Main Relief

Tilt, Auxiliary Relief

kPa psi kPa psi

Model Mast +500,-0 +75,-0 L350 L50

B,BC20S-2

STD

FFL 16600 2400 15500 2250

FFTL

B,BC25S-2

STD

FFL 19300 2800 15500 2250

FFTL

B,BC30S-2

STD

FFL 20700 3000 15500 2250

FFTL

WARNING

IKCS001P