Hypertherm Echion, Operator'S Manual

Page: 87 / 194

Preventive maintenance
3
Echion Operator Manual 810770 87
Pr
even
tive maint
enance
4. Disconnect the lower ends of the hydraulic hoses that enter the top of the tank.
5. Remove the filter element and install a new element. Refer to Replace the hydraulic filter
element on page 84 for instructions.
6. Disassemble the hydraulic tank cover.
a. Disconnect the temperature/level sensor cable.
b. Disconnect the hydraulic hose from the filter.
c. Remove the 2 hoses that pass through the cover.
d. Use a 7/16-inch open-ended wrench to remove the bolts and washers (10 each) from the
tank cover.
7. Clean the inner surfaces of the tank with clean towels. Make sure that no debris is left in the
bottom of the tank.
8. Assemble the hydraulic tank cover.
a. Install the tank cover bolts and washers (10 each).
b. Install the 2 hoses that pass through the cover.
c. Connect the hydraulic hose from the filter
d. Connect the temperature/level sensor cable.
9. Fill the tank with hydraulic fluid until the fluid is at the top mark on the sight gauge.
10. Install a new filler cap.
11. Discard the used parts.
12. Turn
ON
the pump in pierce-pressure mode.
13. Monitor for leaks.
14. Add hydraulic fluid, if necessary. Refer to Add hydraulic fluid on page 85.
15. Operate the pump in pierce-pressure mode for 15 to 20 minutes.

If air is in the hydraulic system, the pump can be noisy during operation. Refer to The
pump makes noise during operation on page 133.
CAUTION
Remove all towels from the tank before putting hydraulic fluid in it.
CAUTION
Do not use soap, detergent, or solvents. Isopropyl alcohol can be used to clean the
tank.