Template Name: OML_2_col Template Date: 1994_04_22
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844/642 Telehandler
HYDRAULICS
RELEASE HYDRAULIC OIL PRESSURE:
PRESSURE CHECKING GUIDELINES:
1. Engage the park brake.
1. Use an accurate gauge.
2. Lower equipment to the ground, return the engine to idle for 30 seconds, then shut down the engine.
2. Release hydraulic oil pressure before connecting and disconnecting any gauge. 3. Run the engine at 1000 RPM in the specified Mode Select position.
3. Turn the key switch on. Operate the joystick in each direction. This should ensure there is no residual pressure trapped in the control circuit. Confir m that there is no attachment or unit movement.
4. As applicable, fully engage the control for the circuit being tested. 5. If adjustment is necessary, obtain each final pressure by bringing the pressure up to the proper setting. Do not bring the pressure to a higher setting and then lower it to the desired setting.
WARNING All trap p ed hyd rau lic p res su re mu st b e exhausted from the system before installing a gauge in any pressure tap. A sudden release of hot oil could cause burns or other serious injury.
WARNING R e l i e f v a l v e s a r e p rov i d e d t o p ro t e c t t h e hydraulic system. Do not increase relief valve pre s s ur e s e t tin gs a bov e s pe c if ic a ti ons o r hydraulic system damage may occur.
WARNING To prevent damage and/or personal injury when using an in-line flowmeter for testing, ALWAYS be sure the load valve on the flowmeter is fully OPEN before starting the engine.
PRINTED IN U.S.A.
601-2
913250
