"3072ES / 3772ES / 3772ES HD" Service & Parts Manual October 2008
Page 1-3
System Flushing Procedure
1. With platform fully lowered, drain hydraulic fluid from hydraulic reservoir into a clean, empty
container. Dispose of fluid in accordance with local environmental guidelines.
2. When the hydraulic reservoir is empty, remove suction strainer and hoses.
3. Remove the return line on the hydraulic reservoir.
4. Remove the bypass filter and hose.
5. Flush the hoses with clean hydraulic fluid.
6. Discard old bypass filter element and replace.
7. Flush out the reservoir with hoses removed.
8. Reinstall all hoses removed in the previous steps.
9. Fill hydraulic reservoir with filtered, fresh hydraulic fluid (refer to Lubrication Chart).
10. Loosen output hose fittings at pump to flood with hydraulic fluid. Tighten fittings.
11. Briefly operate all functions. Two or three lift cycles may be necessary to purge all air from lift
cylinder(s).
12. When the above procedures have been completed, fill hydraulic reservoir (refer to Lubrication
Chart).
13. Check all leaks and correct as necessary. Machine is now ready to be placed into operation.
NOTE: Avoid mixing petroleum and synthetic base fluids. It is not advisable to
mix fluids of different brands or types, except as recommended.
Beware of hot fluid. Contact with hot fluid may cause severe burns.
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