7.1.2 Hydraulic Oil Change:
The recommended hydraulic oil change interval is 2 years for normal service and 1 year for
severe service.
Hydraulic Oil change procedure is as follows:
1. Disconnect the power source to the drive motor.
2. Relieve all pressure from the piping system.
3. Remove the diagnostic window from the top of the eccentric box.
4. Drain the oil by removing the drain plug on the bottom of the eccentric box.
5. Remove and clean the HPV check valve screen (refer to Check Valve Screen – Removal
and Cleaning, Section 7.4.2).
6. Replace the drain plug.
7. Fill the eccentric box with PULSAlube 7H (purple) hydraulic oil (refer to Hydraulic Oil Fill,
Section 5.1.3). Proper fill of a fully drained pump requires 1 liter (approx. 1 quart) of
PULSAlube 7H oil.
8. Replace the diagnostic window.
7.2 WET END REMOVAL, INSPECTION, AND
REINSTALLATION
If the diaphragm has failed, process material may have contaminated the pump hydraulic
oil. Handle with appropriate care, clean and replace oil if required.
PULSALARM LEAK DETECTION SYSTEM
See Appendix I, page 32 for information on maintenance of the PULSAlarm Leak Detection
diaphragm
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