U20-3, U25-3 WSM Hydraulic system (Service section)
IV-S-13
7) Checking the anti-void valve and valve seat
8) Checking the motor drain amount
1. Check the anti-void valve for heavy movement,
scratches, foreign matters, etc.
Prepare an 8M hex hollow wrench that is 45 mm
or so tall.
For servicing, refer to page IV-S-78.
1. Remove the steps.
2. The drain hose is between the swivel motor
and drain pipe. Disconnect this hose from the
drain pipe alone. Plug one end of a 30 cm or
so long spare hose and connect the other end
to the drain pipe.
3. Do and lock the swiveling (with the bucket end
in contact with something fixed), and measure
their respective drain amounts.
For measuring, refer to page IV-S-37.
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