Dover HEIL LIBERTY TP1L-SM-0520, Service Manual

Page: 89 / 136

Issued May 2020
Maintenance and Adjustment
Copyright 2020, Heil Environmental
Printed in the U.S.A.
Maintenance and Adjustment
83
CHECK OIL LEVEL
Check the hydraulic oil level (after warning up the oil) daily or every eight (8) hours, whichever comes first. Fill as
necessary.
Important: Contamination is a hydraulic system’s worst enemy. Do not let dirt enter the system. Use a clean rag and
remove dirt or other contamination around any system component before you disconnect or remove it. While you fill the
reservoir, filter the oil through a 200 mesh (or finer) screen. Never use a cloth to filter the oil.
WHEN TO CHANGE OIL FILTER ELEMENT
Change the filter more often under certain conditions such as an extremely dusty atmosphere or area. Use only Heil
replacement filters. Purchase the filter element from your local Heil distributor.
Change the filter element when oil analysis shows the oil has expired.
CHANGE HYDRAULIC OIL FILTER ELEMENT
Watch the Service Shack Video online at www.Heil.com/Heil-Service-Shack and selecting Changing Filters .
Replace the hydraulic filter element after first 30 days of operation, then every 6 months or 1000 hours of operation OR
when filter bypass light is ON. To change the hydraulic oil filter, refer to the figure below and follow these steps:
1. Using a 1/2" wrench, remove the four (4) nuts from the filter cover located on the hydraulic oil tank.
2. Set the nuts aside for reuse and then remove the filter cover.
3. Remove the filter element with the by-pass assembly and responsibly discard as required.
4. Clean the housing with a clean, lint-free cloth.
5. Check the o-ring and gasket. Replace them if necessary.
6. Lubricate all o-rings and gaskets.
7. Install new element.
8. Reinstall cover with nuts. Torque nuts to 13 ft-lbs.
Figure 32. Hydraulic Oil Filter