844/642 Telehandler HYDRAULICS

STEP 3

OPEN the load control valve of the flowmeter, start the engine and run at 1000 RPM. Slowly close the load control valve until the pressure gauge reads 3000 psi (207 bar).

STEP 4

If the pressure is less than 3000 psi (207 bar) shut off the engine and remove the flow meter inlet hose (1) from the pump (2). Remove the pump from the machine. Repair or replace the pump.

Priority Flow And Flow Divider Pressure Test

NOTE: Before performing any hydraulic test, check for any visible leaks or component damage. Repair or replace the leaking component before proceeding with the test.

NOTE: Before conducting any test port pressure checks, check the engine RPM. Engine speed must be 800 RPM at idle and 2500 to 2550 RPM at high idle.

Plug a 5000 psi (345 bar) gauge into the test port labeled “MP” on the flow divider (1). Start the engine and fully retract the boom and hold (2). The gauge should read 3000 psi (207 bar). Record the pressure, shut the engine off and disconnect the gauge.

Template Name: OML_2_col

Template Date: 1994_04_22