Mazak Computer Numerical Control Machine QTN 20HP

Warning: Only authorized personnel can carry out electric maintenance. Always turn the main circuit breaker to the 'OFF' position, and use an approved lock-out device when completing maintenance or repairs.

All terminal screws of electric parts are tightened securely

Soldered portions have proper strength

The cap of the cartridge fuse is tightened securely

The spark extinguisher case is not discolored

Danger: High voltages are applied to terminals inside the electrical control cabinet, transformer, motor and relay box. Never touch these terminals.

After the power supply has been turned off, the electric components inside the electric control cabinet are still alive with remaining voltage. Before touching these components, make sure that no voltage is applied using a multimeter or other proper instrument.

Before attempting any repair or service work in the electrical control cabinet, confirm the high voltage areas by referring to the electric circuit diagram.

Sign off on the electrical control cabinet check

Tools to be used: Wrench, Allen wrench

Loosen the locknut of the pressure adjusting screw

Adjust pressure to the specified value 60 kgf/cm2 (854 PSI) while reading the indication of the pressure gauge. Pressure increases when the pressure adjusting screw is turned clockwise

Sign off on the pressure adjustment

When changing the hydraulic oil, check and clean the strainer at the same time.

A. Disconnect the suction piping. B. Remove the bolts from the suction port cover, and remove the cover. C. Remove the strainer. 2. Cleaning the micro-separator.

When changing the hydraulic oil, check and clean the micro-separator at the bottom of the reserve tank.

At the same time, check and clean the inside of the reserve tank.

The micro-separator is magnetic and sticks to the reserve tank bottom plate. Metallic particles contained in the hydraulic oil are attracted to this magnet so that the hydraulic oil circulating in the hydraulic system is kept as free of metallic particles as possible.

3. Cleaning the oil filler port filter,

Remove the oil filler port filter and clean with an air gun.

1. Replacing the filter element.

Replace the filter element at least once a year.

B. Replace the hex socket head screw.

C. Pull out the baffle. The filter element can be removed.

D. Replacing the filter element.

F. Tighten the hex socket head screw.

A. The filter separates the pump chamber from the chip pan. It can be removed easily for cleaning. Clean the filter occasionally.

B. Clean the filter using an air gun.

C. Remove chips from the chip pan every day after completing the day's work.

A. After the coolant is drained, remove the separator and clean the inside of the chip pan.

B. Clean the inside of the chip pan with a rag.