| Item | Part No. | Part Name | Qty | Serial No. |
| 20K-63-31800 | CYLINDER ASS'Y,BOOM | K40001- | ||
| 1 | 20K-63-31840 | CYLINDER | K40001- | |
| 2 | 20K-63-31860 | ROD,PISTON | K40001- | |
| 3 | 20K-63-31350 | HEAD,CYLINDER | K40001- | |
| 4 | 20K-63-31360 | COLLAR | K40001- | |
| 5 | \5\707-36-13731 | PISTON | K40001- | |
| 6 | 707-71-61040 | PLUNGER | K40001- | |
| 7 | 01310-01216 | SCREW | K40001- | |
| 8 | 07179-13109 | RING,SNAP | K40001- | |
| 9 | 707-52-90720 | BUSHING | K40001- | |
| 10 | 707-56-95510 | SEAL,DUST | K40001- | |
| 11 | 707-51-95030 | PACKING,ROD | K40001- | |
| 12 | 707-51-95630 | RING,BUFFER | K40001- | |
| 13 | 707-44-13280 | RING,PISTON | K40001- | |
| 14 | 707-39-13510 | RING,WEAR | K40001- | |
| 15 | 707-44-13920 | RING | K40001- | |
| 16 | 07000-15085 | O-RING | K40001- | |
| 17 | 707-35-90960 | RING,BACK-UP | K40001- | |
| 18 | 07000-15125 | O-RING | K40001- | |
| 19 | 707-35-91370 | RING,BACK-UP | K40001- | |
| 20 | 01010-81875 | BOLT | K40001- | |
| 21 | 707-41-11840 | WASHER | K40001- | |
| 22 | 20K-63-31820 | BUSHING | K40001- | |
| 23 | 20K-63-31830 | BUSHING | K40001- | |
| 24 | 07145-00080 | SEAL,DUST | K40001- |