Hitachi ZW310 - Hydraulic System; Inspection and Maintenance of Hydraulic Equipment

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7-40
M4GB-07-044
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  
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 

1. Be sure that the machine is parked on a level, firm surface
before servicing hydraulic equipment.
2. Lower the bucket to the ground and stop the engine.
3. Begin servicing hydraulic components only after compo
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nents, hydraulic oil and lubricants are completely cooled,
and after releasing residual pressure.
3.1 Bleed air from the hydraulic oil tank to release internal
pressure.
3.2 Be sure to relieve the air pressure from the hydraulic oil
tank by pressing air bleed valve (1).
3.3 Allow the machine to cool down.
Note that servicing heated and pressurized hydraulic
components may cause hot parts and/or oil to fly off or
escape suddenly, possibly resulting in personal injury.
3.4 Keep body parts and face away from plugs or screws
when removing them.
Hydraulic components may be pressurized even when
cooled.
3.5 Never attempt to service or inspect the hydraulic cir
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cuits on slopes. They are highly pressurized due to self-
weight.
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