CAT Caterpillar 631E 637E Wheel Tractor Scraper Hydraulic Schematic Manual

CAT Caterpillar 631E 637E Wheel Tractor Scraper Air System Brakes Specifications

CAT Caterpillar 631E 637E Wheel Tractor Scraper Steering System Specifications

Factory CAT Caterpillar 637E Scraper Power Train Disassembly & Assembly Manual

CAT Caterpillar 631E 637E Series II 2 Wheel Tractors Power Train Specifications

CAT Caterpillar 631E 637E Wheel Tractor-Scrapers Cushion Hitch Specifications

CAT Caterpillar 631E 637E Wheel Tractor-Scrapers Hydraulic System Specifications

CAT Caterpillar 637E Scraper Power Train Testing Adjusting Manual Transmission