How to Remove Doosan DL22 Cylinder Disassembly

This article mainly introduces Doosan DL22 Cylinders DISASSEMBLY

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NOTE: Keep on hand a container large enough to hold all of the oil in cylinder being repaired. When cylinder rod and head are removed, oil will run out of cylinder.
NOTE: Dispose of drained fuids according to local regulations.
1. Use an allen wrench to remove bolts that hold cylinder head t
o cylinder tube. See Figure 8.

2.Support cylinder rod with a lifting sling.See Figure 9.Side cylinder rod out of cylinder tube.Rotate cylinder rod slightly as it is being pulled from cylinder tube.This will make it easier to pull rod out of tube.

3.Set cylinder rod assembly in a repair fixture and secure rod in place.See Figure 10.Use a power wrench and socket to remove nut that holds piston on rod.

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4.Remove piston nut（1，Figure 11），piston assembly（2），cushion flange（3），and cylinder head assembly（4）.
Reference OGK品答。|escription
1|Piston Nut
2|Piston Assembly
3|Cushion Flange
|Cylinder Head
4
Assembly

5. Do not remove slipper seal, backup ring, and back ring from piston. If these three items are not scratched or damaged. See Figure 12. Once these 3 items are removed from piston, they must be replaced. They cannot be reused. Exercise caution when removing slipper seal to prevent damage to piston O-ring groove. Remove wear rings from piston.

6. When disassembling cylinder head do not remove slipperseal, backup ring, back ring, or dust seal unless items are scratched or damaged. If seals are removed from head, they must be replaced. They cannot be reused. Remove retaining ring,(1, Figure 13). Use a screwdriver to remove dust seal(2) from head.

7. Use caution to prevent damage to any parts of U-packing

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(1, Figure 14). Remove U-packing(1). Remove O-ring(2), and ring(3)