Replacement and Maintenance Instructions

WARNING (Safety First): Before performing any maintenance, disconnect the compressor from the power supply and completely drain the air receiver tank using the drain valve. Allow the pump head to cool down entirely to prevent severe burns.

1. Disassembly

    Disconnecting lines/filter: Unscrew the delivery pipe fittings and remove the suction air filter connected to the head.

    Removing the head: Loosen and gradually unscrew the cylinder head bolts in a cross/diagonal pattern. Carefully lift and remove the cylinder head.

    Accessing the valve plate: Remove the upper head gasket and lift the valve plate assembly out.

    Extracting the worn spring: Locate the valve guide on the suction side, unscrew the locking nut (typically an M6 self-locking nut), and remove the damaged or fatigued helical spring 7160160000, along with its valve disc/reed.

2. Inspection and Cleaning

    Thoroughly clean the valve seat and plate to remove carbon deposits or oil varnish using an appropriate mechanical solvent.

    Inspect the valve reed/disc for scratches, warping, or wear. If damaged, replace it alongside the spring.

3. Installing the New Spring

    Place the brand-new helical spring 7160160000 into its dedicated valve guide slot.

    Reassemble the suction valve disc/reed on top of the spring.

    Secure the assembly with the self-locking nut, making sure not to over-tighten it so the spring maintains its engineered operational clearance and travel distance.

    Reposition the valve plate back onto the cylinder, always using new gaskets to ensure a reliable airtight seal.

4. Torqueing and Testing

    Replace the cylinder head over the valve plate.

    Hand-tighten the bolts, then use a torque wrench to tighten them incrementally following a cross pattern to distribute the load evenly.

    Reconnect the cooling pipes and air filter.

    Run the compressor unpressurized (no-load) for the first few minutes to monitor for any unusual vibrations or noises.