It is necessary to remove pump when you perform service operation for Yanmar machine.Here is the illustration on how to remove hydraulic pump for Yanmar ViO45-5 and ViO55-5 excavator.
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Procedures:
(1) Swing the upperstructure so that the drain plug 2 of hydraulic oil reservoir 1 can position in the middle of the tracks. Then lower the bucket to the ground and stop the engine.
(2) Open the engine hood rear cover 3 and remove it.
(3) Disconnect the battery negative cable 5 from the battery 4.
(4) Loosen three cap screws 6 to remove the side cover 7.
(5) Remove the bottom cover 8 and put an oil container under the drain plug 2 of the hydraulic oil reservoir.
(6) Remove the drain plug 2 to drain hydraulic oil.
(Q
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