Template Name: OML_2_col Template Date: 1994_04_22
0-00000 Alt= to hide template information Alt+ to display template information
844/642 Telehandler
HYDRAULICS
STEP 89
STEP 90 If the pump, relief valve or any cylinders are repaired or replaced, repeat Steps 87, 88 and 89 to set the main control valve relief pressure at 3000 psi (207 bar).
STEP 91
1
G0805060
G0805055
Remove the pressure gauge from the “MP” test port.
2 G0805061
Shut off the engine. Remove the main relief valve (1) an d tu r n the ad justing scr ew (2 ) clockwise to increase and counter clockwise to decrease the pressure. NOTE: 1/2 turn of the adjusting screw (3) will change the pressure approximately 500 psi (35 bar). Install the main relief valve cover. Repeat Steps 87, 88 and 89 until the pressure gauge reads 3000 psi (207 bar). If the pressure can be adjusted to 3000 psi (207 bar), proceed to Step 90. If the pressure is more than 3000 psi (207 bar) and does not change when the adjusting screw (3) is turned counterclockwise, replace the main relief valve. If the pressure is less than 3000 psi (207 bar) and does not increase when the adjusting screw is turned clockwise, go to the Pump Pressure Test in this manual before replacing the relief valve.
PRINTED IN U.S.A.
601-37
913250
