Dynapac CA121D Compaction Full Schematics Diagrams (Electrical and Hydraulic)

On a CA121D, you’re usually working on tight compaction jobs—road patches, small pads, utility trenches—often in dust, vibration, and lousy weather. This schematic set is what I pull out when an electrical or hydraulic function doesn’t behave and I need to trace the system end to end. It lets you follow how power and oil are routed through the machine so you can track down a dead vibrator, a no-start issue, or a control that’s slow or unresponsive without just throwing parts at it.

Applications & Use Cases

• Trace electrical circuits from the battery to switches, relays, and actuators to isolate shorts, opens, or bad grounds.
• Follow hydraulic flow paths to verify which valve, hose, or component is affecting drum vibration or travel.
• Confirm correct routing when replacing harness sections or hoses so everything is reconnected logically, not just “where it fits.”
• Cross-check modifications or previous repairs against the original layout before you start diagnosing a new fault.
• Plan tests and measurements at the right connectors and ports instead of guessing and back-probing randomly.

FAQ

Q: Can I zoom in on small connector or line details on a tablet?

A: Yes, the diagrams are suitable for zooming, which helps you read pin labels and line routing in the field.

Q: Is this worth printing, or should I keep it digital only?

A: Many techs keep it digital for search and zoom, then print the specific pages they need to mark up by hand during a job.

Safety Note

Always de-energize and depressurize the machine before tracing any electrical or hydraulic circuit using these schematics.

Dynapac CA121D Index:

From S_N 60310121 to 60310844_Rev_A_e0d9bf86.pdf
From S_N 60310121 to 60310861_Rev_D_bc341a01.pdf
From S_N 60310845_Rev_B_7989d035.pdf
From S_N 60310862_Rev_E_b07a8c47.pdf

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