Indication of Fault The hydraulic pump control does not operate.
Possible Cause Malfunction of SCR 2 circuit.
Check for a short circuit across SCR 2.
Check for a short circuit across the suppressor for SCR 2.
Check for an open circuit across SCR 2 or an open gate lead to SCR 2.
Malfunction of SCR 1 circuit.
Check for an open circuit or loose connections between SCR 1 and PZ8 (white/blue wire).
Check for an open circuit or loose connections between SCR 1 and D3 suppressor and PZ9 (blue wire).
Malfunction of SCR 1.
An open or bad gate circuit to SCR 1. No easy test is possible. Replace SCR 1 after the other checks have been done and no other problem is found.
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