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Richdel 476PRI Disassembly: Broken Slide Switches Mean Replace Controller

Problem: Internal Levers Fell Out After Opening

The designation strip fell behind the face. Removing 3 screws released 14 blue lever arms. No diagram exists for reassembly.

Verdict: Controller Is Obsolete and Unrepairable

Richdel 476PRI hasn't been made in 10+ years due to chronic slide switch failures. Reassembly is impractical; even if reassembled, switches will fail again.

Replacement Recommendations

Irritrol Rain Dial — easy programming, long life, repairable.
Rain Bird ESP series — equally reliable.

Any sprinkler supply store carries these. Label wires before swapping controllers.

Irrigation: Hydro Rain HR 6100 Dial Disengaged: Replace with Irritrol Rain Dial; Irritrol RD-600 Only Outputs 15VAC: Controller or Wiring Fault?; Hunter EC Controller Stations 1&2 Not Working: Power Surge Damage; Richdel 446PR Storm Damage: Replace with Rain Bird ESP or Irritrol Rain Dial; Hardie Controller: Last 2 Stations Won't Run Manually; Diagnosing Pulsing Zone on Hunter Pro-C Controller; Testing a Rain Bird ESP-6TM Controller After Lightning Damage; Richdel 446PRi Controller Replacement: Avoid Overpriced Quotes; How Underground Sprinkler Valve Boxes Stay Securely in Place; 4-Zone Controller Replacement: Mid-Grade Hunter or Rain Bird, DIY Install

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