Service Manual
Series 45 J Frame Open Circuit Axial Piston Pumps
520L0607
• Rev AI • Sep 2013
17
Change the fluid and filter per the
vehicle/machine manufacturer’s
recommendations or at these intervals:
Change the fluid more frequently if it becomes
contaminated with foreign matter (dirt, water,
grease, etc.) or if the fluid is subjected to
temperature levels greater that the recommended maximum.
Dispose of used hydraulic fluid properly. Never reuse hydraulic fluid.
Change filters whenever the fluid is changed or when the filter indicator shows that it is necessary to
change the filter. Replace all fluid lost during filter change.
To ensure optimum life of Series 45 products, perform regular maintenance of the fluid and filter.
Contaminated fluid is the main cause of unit failure. Take care to maintain fluid cleanliness when
servicing.
Check the reservoir daily for proper fluid level, the presence of water, and rancid fluid odor. Water in
the fluid may be noted by a cloudy or milky appearance or free water in the bottom of the reservoir.
Rancid odor indicates the fluid has been exposed to excessive heat. Change the fluid immediately if
these conditions occur. Correct the problem immediately.
Fluid and Filter Maintenance
Recommendations
Fluid and filter change interval
Reservoir type
Maximum change interval
Sealed
2000 hours
Breather
500 hours