CAT 347F AT21‑UP Excavator Hydraulic & Electrical System Service Manual — comprehensive repair, maintenance, wiring and hydraulic schematics for technicians and fleet managers.
This manual covers the CAT 347F (AT21‑UP) hydraulic and electrical systems in detail, including wiring diagrams, hydraulic schematics, component locations, pump and valve descriptions, solenoid and sensor diagnostics, connector pinouts, calibration procedures, troubleshooting flowcharts, preventive maintenance tasks, safety cautions, and parts reference numbers. Ideal for service technicians, maintenance planners, and equipment owners seeking step‑by‑step diagnostics, repair instructions, and system-level understanding to minimize downtime and improve reliability.
