TM 5-3895-346-14
MAINTENANCE
HYDROSTATIC SYSTEM
SYSTEM MAINTENACE
FLUID Generally, a fluid change interval of 2000 hours is adequate with a sealed reservoir system. A more
frequent fluid change is required if the fluid has become contaminated by water or other foreign material or has
been subjected to abnormal operating conditions.
An open reservoir system with an air-breathing filler cap requires the fluid to be changed every 500 hours.
More specific practices should be developed as a function of vehicle design, applied use and experience in
operation. (See Recommended Fluids.)
FILTER As a general recommendation, with a sealed reservoir system, the 10-micron inlet filter should be
changed each spring or every 500 hours, whichever occurs first. With an open reservoir system utilizing an air-
breathing filler cap, the filter should be changed every 500 hours.
RESERVOIR The reservoir should be checked daily for the proper fluid level and the presence of water in the
fluid. If fluid must be added to the reservoir, use only filtered or strained fluid. Drain any water as required.
HYDRAULIC LINES AND FITTINGS
Visually check daily for any fluid leakage. Tighten, repair or replace as
required.
HEAT EXCHANGER The heat exchanger core and cooling fins should be kept clean at all times for maximum
cooling and system efficiency. Inspect daily for any external blockage and clean as required.
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