| Reference | | Series 6 Cranes |
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| Equipment | | Telescopic boom with two articulations |
| | With one, two or three hydraulic extensions |
| | Dual side control valves |
| | 400 Degrees rotation |
| | Oil tank capacity 10 gal. |
| | Pilot operated check valves on all cylinders |
| | 1.5 Ton revolving hook |
| | Two inclinable hydraulic outriggers | |
| | Outrigger booms manually extendible | |
| | Crane painted standard PM White | |
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| Lift Capacities | | Model 6521 | |
| | 6,900 lbs. at 6' 7" | |
| | 5,970 lbs. at 7' 7" | |
| | 4,410 lbs. at 10' 2" | |
| | 3,970 lbs. at 11' 4" | |
| | 2,710 lbs. at 16' 9" | |
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| | Model 6522 | |
| | 6,720 lbs. at 6' 7" | |
| | 5,970 lbs. at 7' 3" | |
| | 4,190 lbs. at 10' 4" | |
| | 3,790 lbs. at 11' 8" | |
| | 2,560 lbs. at 17' 1" | |
| | 1,830 lbs. at 22' 8" | |
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| | Model 6523 | |
| | 6,280 lbs. at 6' 7" | |
| | 5,780 lbs. at 7' 3" | |
| | 3,970 lbs. at 10' 4" | |
| | 3,460 lbs. at 11'10" | |
| | 2,270 lbs. at 17' 3" | |
| | 1,630 lbs. at 22'10" | |
| | 1,210 lbs. at 28' 7" | |
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