Caterpillar 637G WHEEL TRACTOR Service Repair Manual AXT
Quick loading, high travel speeds and the ability to load and dump on the run yield fast cycle times, allowing Caterpillar Wheel Tractor-Scrapers to consistently deliver high productivity.
Transmission.
Electronically controlled Caterpillar planetary powershift transmission with eight forward and one reverse speed. Tractor gears 1 and 2 operate in converter drive for increased
torque capability during cut and fill operations. Gears 3-8 operate in directdrive for drive train efficiency during the haul. All scraper gears operate in converter drive for increased torque
capability during the cut and fill. C350295-Caterpillar 637G WHEEL TRACTOR
Synchronized Scraper Transmission.
The scraper transmission is electronically controlled by the tractor transmission, synchronizing the scraper transmission gear selection with that of the tractor transmission. The scraper transmission cannot be shifted manually. A neutral/run switch, located in the cab, allows the operator to disengage the scraper transmission.
Structures
Superior structural design and construction optimize performance and reliability
1 Load cylinder
2 Hitch castings
3 Scraper gooseneck
4 Nitrogen accumulators
5 Orifice
6 Oil from tractor hydraulic system
7 Leveling valve
8 Free floating pistons