Dynapac F121-W D Paving Full Schematics Diagrams (Electrical and Hydraulic)

On a Dynapac F121C paver that spends its life in hot asphalt, night work, and tight road jobs, this schematic set is what I’d pull out when something electrical or hydraulic doesn’t behave the way it should. It doesn’t tell you how to swing wrenches; it shows you how the machine is wired and plumbed so you can trace systems logically. For example, if a conveyor suddenly stops feeding but the engine runs fine, I’d use this document to follow power from the control station through relays and valves, then map the hydraulic path to see where the signal or oil flow is dropping out.

Applications & Use Cases

• Track down intermittent electrical faults by following circuits from the battery to the affected component.
• Isolate hydraulic issues like weak augers or uneven screed lift by tracing line routing and valve relationships.
• Verify correct connection points after replacing harnesses, sensors, or valves.
• Plan cleaner retrofits or add‑ons by seeing how existing circuits and lines are laid out.
• Cross-check what you see on the machine against the schematic when hoses or wires have been previously “field-modified.”

FAQ

Q: Can I zoom in on small symbols and wire labels on a tablet?

A: Yes, the file can be used digitally so you can zoom in on details while standing next to the paver.

Q: Is this worth printing, or should I just keep it on my laptop?

A: Many techs print key pages for the toolbox and keep the full version on a laptop for quick searching on site.

Safety Note

Always de-energize and depressurize systems before using this schematic to inspect or disconnect any components.

Dynapac F121-W D Index:

From S_N 634.100-634.303; from 0G000309_Rev_COM3_8acade91.pdf
From S_N 634.100-634.303; from 0G000309_Rev_COM3_13dd920e.pdf
From S_N 654.100-654.258, 654.263, 654.264, 654.270, 654.271_Rev_COM1_657c2397.pdf
From S_N 654.100-654.258, 654.263, 654.264, 654.270, 654.271_Rev_COM1_e28833f1.pdf
From S_N 654.100-654.258, 654.263, 654.264, 654.270, 654.271_Rev_COM1_fa98b3d5.pdf
From S_N 654.259-654.262, 654.265-654.269, from 654.272_Rev_COM2_2acfdd6f.pdf
From S_N 654.259-654.262, 654.265-654.269, from 654.272_Rev_COM2_2b8a589c.pdf
From S_N 654.259-654.262, 654.265-654.269, from 654.272_Rev_COM2_9cd8462d.pdf
From S_N 654.259-654.262, 654.265-654.269, from 654.272_Rev_COM2_920f9db1.pdf
From S_N 654.259-654.262, 654.265-654.269, from 654.272_Rev_COM2_c84c15dc.pdf
From S_N 654.259-654.262, 654.265-654.269, from 654.272_Rev_COM2_f953c56e.pdf

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