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’ty: 10 Gal(38L))
At this time, loosening or removing the filler cap 9 make oil draining easier.
(7) Disconnect hydraulic hoses from the hydraulic pump.
a. Suction
b. P1
c. P2
d. P3
e. B1
f. B2
g. A
h. P(P4)
i. C1
j. C2
Note :
• Mark each hose to reinstall on the original position.
• Plug each hose end and fittings on the control valve against dust.
(8) Remove the couplers 6 of the wires for the cut-off valve,the high-speed travel and the quick coupler.
(9) Remove the installation bolts 7 from the flywheel cover to remove the hydraulic pump.
Note :
Put rope onto the hydraulic pump to remove it using a lifting device.Yanmar SmartAssist 2023
More Yanmar machine repair case,please refer to Yanmar Trouble Repair
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