Check The Hydraulic Fluid Quality - Hypertherm HyPrecision Predictive P-15 Operator's Manual

5 – Preventive maintenance

Check the hydraulic fluid quality

Do this every work shift.
Replace the hydraulic fluid:
• If it is dark or milky in color
• If it has a strong odor
• After every 3,000 hours of operation
Contact a hydraulic fluid supplier for a precise report about your hydraulic fluid quality.
Do this task when the pump is not running.
1. Make sure that the drain valve is closed.
2. Look through the sight gauge to see the color of the hydraulic fluid. Good hydraulic fluid is almost
transparent.
3. Remove the filler-breather cap on top of the tank.
4. Smell the hydraulic fluid. Good hydraulic fluid has almost no odor.
Replace the hydraulic filter
Replace the hydraulic filter:
• Every 1,500 hours
• When the white indicator bar stays in the red zone while the pump is at operating temperature
Refer to Replace the hydraulic filter on page 83 for instructions.
Parts, tools, and materials
1-16025 Hydraulic filter 
(1-17473 Hydraulic fluid service kit includes 2)
Antiwear (AW) mineral oil or synthetic hydraulic
fluid, ISO viscosity grade (VG) 32 or 46
Strap wrench
Do this task when the pump is not running.
1. Remove the used filter from the filter head.
2. Put clean hydraulic fluid on the gasket on the new filter.
3. Twist the filter onto the filter head.
4. Tighten the filter with a strap wrench.
5. Turn the pump in cooling mode.
ON
6. Monitor for leaks.
7. Check the hydraulic fluid level. Add hydraulic fluid, if necessary. Refer to page 82 for instructions.
HyPrecision Predictive waterjet pump Operator Manual 810120 83