TM 9-2330-381-14
4-20. HYDRAULIC SYSTEM FLUSHING (CONT)
STEERING SYSTEM FLUSHING
NOTE
This procedure requires use of a Y-hose and two 5/8-3/4-inch straight adapters.
A drain pan must be placed to collect excess fluid drainage. Fluid collected into
drain pan should be drained into waste oil receptacle as often as needed.
1.
Place drain pan below hose assemblies (16) at aft elbow fittings (17) on both platform steering cylinders (18).
2.
Tag and disconnect two hose assemblies (16) from aft elbow fittings (17) on both platform steering cylinders (18).
Install caps onto each elbow fitting.
3.
Connect a 5/8-3/4-inch straight adapter (19) to each hose assembly (16). Remove caps/plugs installed and connect
free ends of Y-hose (5) to straight adapters (19).
4.
Pull up and hold handle of steering control valve (para. 2-6). Have a second person check return hose (4) at
hydraulic tank filler neck to ensure hydraulic fluid is flowing back into hydraulic tank.
5.
Continue to hold handle of steering control valve for a minimum of 10 minutes; then, release valve handle. Monitor
filter indicator.
6.
Push down and hold handle of steering control valve. Have a second person check return hose (4) at hydraulic
tank filler neck to ensure hydraulic fluid is flowing back into hydraulic tank.
7.
Continue to hold handle of steering control valve for a minimum of 10 minutes; then, release valve handle. Monitor
filter indicator.
8.
Remove ends of Y-hose (5) from two straight adapters (19) and install caps/plugs into end of Y-hose.
9.
Remove two straight adapters (19) from two hose assemblies (16). Install caps/plugs onto straight adapters.
10.
Remove caps/plugs installed on elbow fittings (17) on aft port of steering cylinders (18).
Connect two hose
assemblies (16) back onto elbow fittings (17).
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