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Scrapers
| Term | Definition |
|---|---|
| Nomenclature | Model 621 - G Pusher Assisted single axle tractor |
| Weight | Empty - 74,300 Rated load - 52,800 |
| Loaded Struck | 127,100 lbs (15.7 CY) |
| Loaded Heaped | 132,245 lbs (22 CY) |
| Height | 11ft 4 in |
| tractor ground clearance | 21.8 in |
| scraper ground clearance | 20.6 in |
| length | 43 ft 3 in |
| Rim pull | force available between tire and ground to move tractor forward |
| 1st and 2nd gear | 330 hp @ 1800 rpm |
| 3-8 gears | 365 hp @ 1800 rpm |
| Volt system (slave recep.) | 24V |
| Transmission | 8 forward, 1 reverse |
| Cutting edges | change - 3/4" from moldboard max cut depth - 13.1 in |
| Bowl cut width | 119 in |
| Side Slope | w/ load - 20% (11 deg. 1st gear/reverse) wo/ load - 35% (20 deg.) |
| Minimum effective hauling distance | 300 Ft |
| Maximum effective hauling distance | 3000 ft |
| Struck Capacity | 15.7 cu yds |
| Heaped capacity | 22 cu yds |
| Techniques | downhill loading obtain larger loads in no time |
| Chain loading | long continuous cut with 2 or more scrapers |
| shuttle loading | short cuts in both direction, pushes one scraper and pushes a second in opposite direction |
| back track loading | short cuts |
| Travel configuration (2 knuckle ) | 4-6 in off ground ejector to rear apron on float |
| Cut position (3 knuckle) | 1 in off ground apron open 12 in ejector to rear |
| Level position | bowl level on ground apron open ejector forward |
| Park line | Neutral, park brake bowl on ground Ejector forward apron float |
| Steering width - Right turn | 90 deg, 38 ft radius |
| Steering Width - Left turn | 85 deg, 40 ft radius |
| Dome light | in STOP LIGHT/SER DRIVE door open |
| Power Receptable | 12V |
| Cushion Hitch control | active except when loading or spreading material |
| Overspeed Condition | top gear control will allow transmission to upshift one speed |
| Max speed | 32 MPH |
| Loping | rhythmic up-and-down motion of the machine |
| Front tire pressure | 65 psi |
| Rear tire pressure | 55 psi |
| Fuel Capacity | 160.1 gal |
| Coolant system | 19.3 gal (50/50 mix of water and antifreeze) |
| Temperature 32 deg. or above | 15 min warm up |
| Temperature below 32 deg | 30 min warm up |