This article introduces Doosan DL220 Power Steering System DISASSEMBLY
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It is very important to keep the inside of the steering unit clean.
Make sure that the outside of the steering unit is clean before
opening the unit. Use a wire brush and solvent to clean the
entire unit.
1. Remove steering column from steering unit. Bolt steering
unit to stabilizing base. Bolt base to work bench.
2. Remove bolts from steering unit end cover. See Figure 30.
3. Remove end cover from unit. See Figure 31.
4. Lift cylinder gear off unit. See Figure 32. Remove two Orings.
5. Remove spacer bushing and spacer from cylinder gear (If
equipped). See Figure 33.
NOTE: Refer to parts manual for our unit to determine if
these parts are installed.
6. Remove shaft from housing. See Figure 34.
7. Remove distributor plate from housing. See Figure 35.
8. Remove O-ring from top of middle plate. See Figure 36.
9. Lift middle plate off housing. See Figure 37.
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10. Remove O-ring from housing. See Figure 38.
11. Unscrew threaded bushing and remove it. See Figure 39.
12. Remove cross pin. See Figure 40
13. Shake ball out of housing. See Figure 41.
14. Pull sleeve and spool out of housing. See Figure 42.
15. Remove thrust bearing and thrust washers from sleeve.
See Figure 43. Remove spacer ring. Be sure to remove
spacer ring. It can stick in sleeve.
16. Carefully slide control spool out of sleeve. See Figure 44.
17. Push neutral position springs out of groove in spool. See
Figure 45.
18. Remove dust seal from housing. See Figure 46. Remove
O-ring and backup ring from inside housing.
19. Figure 47, shows all parts removed from steering unit.
Clean all parts before assembly. Use only new O-rings and
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