844/642 Telehandler HYDRAULICS

Step 22

Start the engine and run at 1000 RPM. Hold the joystick in the LOWER position.

If the pressure gauge reads 3000 psi (207 bar), repair or replace the opposite side lift cylinder.

If the pressure is less than 3000 psi (207 bar, proceed to Step 23.

Step 23

Hold the joystick in the LOWER position.

Slowly close the load control valve of the flowmeter until the pressure gauge reads 3000 psi (207 bar).

If the pressure is 3000 psi (207 bar), repair or replace both lift cylinders.

If the pressure is less than 3000 psi (207 bar), follow the procedure in the Main Control Valve Pressure Relief Test and Adjustment section of this manual.

Template Name: OML_2_col

Template Date: 1994_04_22

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844/642 Telehandler HYDRAULICS

Tilt Cylinder Quick Test

STEP 24

Install a 5000 psi (345 bar) pressure gauge and hose on the test port labeled “MP” on the flow divider.

NOTE: The hose must be long enough to observe the pressure gauge from inside the cab or standing clear of the forklift.

STEP 25

Start the engine and run at 1000 RPM. Retract the boom until the extend cylinder is at the end of its stroke and hold the joystick in the RETRACT position. The pressure gauge should read 3000 psi (207 bar).

IF the pressure is more or less than 3000 psi (207 bar) proceed to the Main Control Valve Pressure Relief Test and Adjustment section of this manual.

STEP 26

Tilt the attachment mount up until the tilt cylinder reaches the end of its stroke and hold the joystick in the TILT UP position. The pressure gauge should read 3000 psi (207 bar).

If the pressure is at 3000 psi (207 bar), but the tilt cylinder does not work, check the hoses and steel tubes between the control valve and tilt cylinder or check the cylinder barrel for damage.

If the pressure is less than 3000 psi (207 bar) proceed to the next step.

Tilt Cylinder Direct Test

STEP 27

Shut off the engine. Remove the hose (1) from the piston (tilt up) port (2) of the tilt cylinder. Cap the cylinder port. Install a 5000 psi (345 bar) pressure gauge (3) and hose on the cylinder supply hose.

Template Name: OML_2_col

Template Date: 1994_04_22