84 Operation Section
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1. In order to open protection cover (3), unlock lock (2) and turn lock (4) counterclockwise. Then, pull latch (1) outward.
Illustration 134
Illustration 127 Hydraulic tank filler cap
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2. Lift latch (5), and turn the latch counterclockwise in order to relieve the pressure in the hydraulic system. Remove hydraulic tank filler cap (6).
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1. Locate load control valve (10). Measure the distance from the head of adjustment screw (8) to the top of locknut (9). Record this measurement. This measurement will be required later when adjustment screw (8) is reset. Fully slacken locknut (9). Turn adjustment screw (8) by hand in order to contact the ball. Attach a wrench to adjustment screw (8) and turn the screw clockwise until the screw becomes tight. Note: Do not use excessive force when a wrench is used in order to turn adjustment screw (8).
Illustration 128 Drain plug
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3. Remove drain plug (7) from the bottom of the hydraulic tank and drain 12 L (3.17 US gal) of oil into a suitable container. Clean the drain plug. Install the drain plug back into the hydraulic tank. If the boom does not need to be retracted, proceed to "Procedure for Lowering the Boom without Hand Pump".
Procedure for Retracting the Boom without Hand Pump Note: If the angle of the boom is below approximately 55 degrees, the boom may not retract without the hand pump. If the boom is below 55 degrees and there is only a light load on the work tool, refer to "Procedure for Retracting the Boom with Hand Pump".
Illustration 135
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2. Locate the rear access cover on the right side of the chassis. Remove the two washers and two bolts that secure the access cover to the chassis. Remove the access cover in order to gain access to the control valve.
