Hypertherm HyPrecision 100D Instruction Manual page 54

High Temperature
Running the pump at a high oil temperature will shorten the oil life. Excessive oil temperatures will
darken the oils color and its smell will worsen. The recommended oil temperature is under 130ºF but not
less than 100ºF. The pump system will give a high temperature warning at 130ºF and shutdown at
150ºF. See the Low-Pressure Water section for instructions on adjusting the water-modulating valve
for water/oil cooled units. Air/oil cooled units should not need any adjustment. If you are having chronic
overheating conditions with an air/oil cooler contact a Hypertherm service representative for further
instruction.
Water Contamination
A milky oil appearance will indicate that there is water in the oil, or "water contamination". If the
hydraulic oil has been contaminated it can damage the hydraulic pump. The pump will need to be shut
down immediately and the oil will have to be drained. Once the oil is drained, all the components must
be cleaned. Water can be injected into the oil from the dynamic water seal in the intensifier. A badly
leaking dynamic water seal can squirt water past the rod seal into the oil (see the High-Pressure Water
section).
The oil, dynamic seal, and rod seal will need to be replaced. If you have water in your oil please report
the incident to an authorized Hypertherm service representative to receive any additional instructions.
Oil Replacement Procedure
While changing the oil, consider thoroughly cleaning out the hydraulic system.
Requires:
•
Appropriately sized suction strainers
•
Appropriately sized return diffusers (if applicable)
•
Hydraulic Filter Element
•
New oil, provided by your supplier
1. Drain the oil from the hydraulic tank using the ball valve at the bottom of the tank.
2. Remove the access cover of the hydraulic tank.
3. Remove and discard the suction strainers in the tank.
4. Thoroughly clean the tank interior. Make sure no particulates remain on the bottom.
5. Install new suction strainers. DO NOT use Teflon tape or pipe dope.
6. Drain the oil in the hydraulic hoses by disconnecting one end.
7. Reinstall hoses.
8. Replace the oil filter element. (See the Oil Filter section that follows).
9. Close the ball valve drain and reinstall the tank access cover.
10. Fill the hydraulic tank with new oil.
11. Let the oil sit until any bubbles dissipate.
12. Start the pump at low pressure and check for hose leaks.
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