Broderson IC-40-D - Purging the Hydraulic System

3-21
APPROVED HYDRAULIC FLUIDS
WARM CLIMATE:
COOL CLIMATE:
*D-A AUTOTRANS SUPER PLUS MOBIL MULTI-VEHICLE A.T.F
MOBIL MULTI-VEHICLE A.T.F. DEXRON VI
DEXRON VI
* D-A Lube, Autotrans Super Plus, was used at the factory to fill the hydraulic system of
your IC-40.
C A U T I O N
Never add kerosene or other "thinners" to hydraulic oil. These fluids have low
aniline points and consequently will cause rapid deterioration of certain packings
and seals in the hydraulic system.
C A U T I O N
Serious damage to the pumps will result if they are run with the shutoff valves
closed or with insufficient oil level in the reservoir.
Observe the operation of the machine. If the oil is too cold, the machine will be sluggish
and should be warmed up further before sustained hard work is attempted. If the oil is
too hot, leakage will increase, pump efficiency will go down, and moving parts will not be
properly lubricated. If operating temperature is excessive, rapid deterioration of the oil
will result and moving parts & seals will wear more quickly. The cause of the excess heat
should be determined and corrected. Oil temperature should never exceed 200 F (93
C).
PURGING THE HYDRAULIC SYSTEM
If excessive water or other contamination is found in the hydraulic oil, the source should
be found and fixed, and the oil should be changed. However, there will still be contami-
nated oil in the hydraulic cylinders. This oil should be purged by the following procedure:
1. Drain the reservoir, open the three gate valves under the reservoir, and remove the
two filter elements & the strainer.
2. Disconnect the following hoses: The four hoses at the reservoir, the return hose at
the inlet of the smaller filter, the case drain hose at the hydrostatic transmission
piston pump, the two pressure hoses at the double gear pump, and the two pressure
hoses at the right-hand wheel motor.
3. Allow the oil to drain from the hoses and be careful to prevent dirt from getting in the
hoses.
4. Blow out the oil cooler with compressed air, through the hoses attached to it.