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The KOMATSU D31E-20, D31P-20, D31PL-20, D31PLL-20, D31P-20A, D37E-5, D37P-5A BULLDOZER Operation & Maintenance Manual — a factory-style reference for maintenance, diagnostics and full repair procedures on your Komatsu crawler dozer. Covers engine, hydraulics, electrical and wiring, drivetrain and undercarriage with the specifications, torque values and step-by-step instructions the job requires.