- Valve block start-up sequence.
- Check that the flow of oil through the return pipe of the start-up valve only happens for a moment and when the start-up takes place. If the flow is
continuous, there is a problem at this point:
- The start-up sequence piston may be blocked.
Proceed to clean any possible shavings or impurities.
Check the appearance of the seating in the piston’s locking cone into the body of the start-up sequence block. Make it if it being wrong.
- Take the start-up block apart to clean the jet and the filter acting as a connection with the main block, as they may be obstructed.
- Discharge piston.
- The discharge piston may be blocked the oil is being returned through the main discharge pipe (yellow or black hose).
Proceed to clean any possible shavings or impurities which may be blocking the aforementioned piston or its position.
Make finishing sand in the piston and repair any possible scratches.
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