Before Starting
`
657 TRACTOR-SCRAPER
[GEG00272]
MACHINE ARRANGEMENT
657 TRACTOR-SCRAPER
Safety
657 TRACTOR-SCRAPER
Controls
657 TRACTOR-SCRAPER
Before Starting
657 TRACTOR-SCRAPER
Starting The Engines
657 TRACTOR-SCRAPER
After Starting
1.1. Positioning Seat
- 1. Check engine crankcase oil level. Level should be in SAFE STARTING RANGE on engine stopped side of gauge.
- 2. Check tractor engine coolant level. Maintain level to bottom of fill pipe.
- 3. Check tractor engine fuel level.
- 4. Check tractor engine air cleaner service indicator. Have filter elements serviced if indicator piston is locked in the visible position.
- 5. Check tractor transmission oil level. Oil level should show on gauge.
- 6. Check tractor-scraper hydraulic system oil level. Oil should be above ADD mark in sight gauge or to FULL mark on plunger gauge.
- 7. Check scraper engine crankcase oil level. Oil level should be above FULL mark on gauge.
- 8. Check scraper transmission oil level. Oil level should show on gauge.
- 9. Check scraper engine coolant level. Maintain level to bottom of fill pipe.
- 10. Check scraper engine air cleaner service indicator. Have filter elements serviced if indicator piston is locked in the visible position.
- 11. Check scraper engine fuel level.
- 12. Check tire pressures. (See page 39.)
- 13. Check controls for free movement.
Positioning Seat
- 1. Check seat suspension adjustment while seated.
- 2. Seat support edge must be even with adjustment line or injury can result.
- 3. Turn handle until edge is even with line.
- 4. Push lever to adjust seat forward or backward.
Show/hide table
![]() |
Seat adjustment must be checked at the beginning of each shift and when operators change. Always check condition of seat belt. |
![]() |
Information System:
657 TRACTOR-SCRAPER
Controls
657 TRACTOR-SCRAPER
Safety
641 & 651 TRACTOR-SCRAPERS
Operating Techniques
641 & 651 TRACTOR-SCRAPERS
Moving The Tractor-Scraper
641 & 651 TRACTOR-SCRAPERS
Starting The Engine
641 & 651 TRACTOR-SCRAPERS
Before Starting
641 & 651 TRACTOR-SCRAPERS
Controls
641 & 651 TRACTOR-SCRAPERS
Safety
MODEL R, S & U BULLDOZERS
When Required
613 TRACTOR-SCRAPER
Operating Techniques
613 TRACTOR-SCRAPER
Operating Adjustments
613 TRACTOR-SCRAPER
Moving The Tractor-Scraper
657 TRACTOR-SCRAPER
Starting The Engines
657 TRACTOR-SCRAPER
After Starting
657 TRACTOR-SCRAPER
Moving The Tractor-Scraper
657 TRACTOR-SCRAPER
Operating Techniques
641B & 651B TRACTOR-SCRAPERS
Safety
641B & 651B TRACTOR-SCRAPERS
Fuel and Lubricant Specifications
641B & 651B TRACTOR-SCRAPERS
Every 250 Service Hours Or Monthly
641B & 651B TRACTOR-SCRAPERS
Every 500 Service Hours Or 3 Months
641B & 651B TRACTOR-SCRAPERS
Every 1000 Service Hours Or 6 Months
641B & 651B TRACTOR-SCRAPERS
Every 2000 Service Hours Or 1 Year
641B & 651B TRACTOR-SCRAPERS
When Required
657 WHEEL TRACTOR-SCRAPER
Safety