Nittoh UP-45SV Series, Руководство по эксплуатации и обслуживанию

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5-4 Quick couplers
① Connections
Make sure that all couplers are connected properly. Incomplete coupling connections
might cause partial or complete blockage of oil flow, resulting in trouble of hydraulic
system.
② Handling WARNING
Stop operating of the pump with a hose and coupler, but without a cylinder. The damaged
coupler will cause accident. Do not disconnect the coupler sets, which are under pressure.
5-5 Bleeding air from the system
CAUTION
In case a new cylinder and/or a hose is connected with the pump or hydraulic oil is
exchanged, air may accumulate in the hydraulic system. This air will cause the pump not
deliver oil or the cylinder to respond in an unstable or slow manner. To remove this air;
(a)
The cylinder(s) must be positioned on their side with the couplers located upward.
(b) Remove any load from the cylinder(s) and cycle the hydraulic system through several
cycles (fully extend and retract the cylinders) or intermittently 2 to 3 minutes.
5-6 Carbon brushes
① Cautions when in use WARNING
Always check the wearing condition of the carbon brushes. When the carbon brushes have
been worn down and exchanging time has come, the motor will stop automatically.
Replace when a carbon brush has been worn down to 6mm in length as shown below or
working time of the motor is 150 hours or more subject to the conditions of their uses. Use
only NITTOH carbon brushes with these pumps to promote long pump life. When they
have been worn down, the spring exerts insufficient pressure to hold brush against the
commutator.
② How to change
Firstly disconnect the power supply. Remove rubber caps on two places and loosen and
remove fitting screws inside with a screw driver, so the carbon brushes can be taken out.
Replace with new ones and fix the screws and rubber caps.