Question 1

Press brake daily maintenance

Accepted Answer

The daily lubrication is limited to the guides of the ram, Y1 and Y2.
Rolling ball screws of back gauge. Clean carefully. Take off dust and remaining lubricant, Lubrication: 1 or 2 lubrication shots on the greasing nipples and nut seats.

Question 2

Yearly or all 1600 operation hours' maintenance

Accepted Answer

Change oil in the tank every year.
Change high-pressure valve filter every year.

Question 3

Ram return speed too slow and renturn pressure too high

Accepted Answer

Reason analysis: 
The main reason is surge check valve did not open.This phenomenon is opposite to the question three above-mentioned and you can deal with it refering to question three.

Question 4

Dwell time is too long when ram speed changing from fast to slow

Accepted Answer

Reason analysis: 
a.Check whether oil level of the oil box is too low and surge check can not immerged.
Solution:
Make oil level above surge check at least 5mm.
a.Reset system parameter can low down moving speed.
b.Check whether surge check valve totally opened and if not will cause stoppage of spool of surge check valve.
c. Clean surge check valve and reload it.

Question 5

High-pressure filtering alarm

Accepted Answer

Reason analysis: 
a.Please change filter element ;
b.Please change hydraulic oil and filter element.
Remark:This filter element can not reusage.You have to change filter element in a week after filter element alarmed or will cause accident.

Question 6

Oil temperature is so high that hydraulic system can not work regularly and seal lose it's effect.

Accepted Answer

Reason analysis:
a.Hydraulic oil model can not reach standard;
b.System pressure is so high that it damaged seriously.
c.High-pressure filtering element clogging
d.Environment temperature is too high and working time is too long .Machine wityout cooling device.
Solution:
a.Change hydraulic oil reached standard and durable 46# hydraulic oil is recommended;
b.Low down system working and unload pressure;
c.Change high-pressure filter element and enlarge oil return route;
d.Equipped cooling device w

Question 7

Oil pump is noisy

Accepted Answer

Reason analysis:
a.Check filter element of the inlet port
b.Check high-pressure filter element 
c.Working time of oil pump is too long cause abrasion
Solution:
a.Clean or change filter element 
b.Change high-pressure filter element
c.Change oil pump

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