Fluid and Filter Recommendations
To ensure optimum life, 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. Fluid
contaminated by water may appear cloudy or milky or free water may settle 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.
Inspect vehicle for leaks daily.
Change the fluid and filter per the vehicle/machine manufacturer's recommendations or at these
intervals.
We recommend first fluid change occur at 500 hours of operation.
Fluid and Filter Change Interval
Reservoir Type
Max. Oil Change Interval
Sealed
2000 Hours
Breather
500 Hours
C
Caution
High temperatures and pressures accelerate fluid aging. This may require more frequent fluid changes.
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 than the recommended maximum. Dispose
of used hydraulic fluid properly. Never reuse hydraulic fluid.
Change filters when changing fluid or when the filter indicator directs. Replace all fluid lost during filter
change
W
Warning
Hydraulic fluid contains hazardous material. Avoid contact with hydraulic fluid. Always dispose of used
hydraulic fluid according to state, and federal environmental regulations. Never reuse hydraulic fluid.
Service Manual
LDT 21/24/32 Closed Circuit Axial Piston Transmission
Fluid and Filter Maintenance
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Danfoss | June 2022
AX417167456877en-000101
