Cleaning

LUCCA A53 / A53 Mini / Vivaldi / Mini Vivaldi: Cleaning Group Head Solenoid (2019-Present)

If you find yourself unable to get water from your group head or your group head is constantly dripping, you may have a blockage in the group head solenoid. (Difficulty ☕☕☕)

Tools Needed:
- 17mm, 22mm crescent wrenches
- Adjustable wrench
- 3mm Allen key or hex driver

1. Remove the front panel from the machine and set aside. Identify the group head solenoid.
Lucca_A53_brew_solenoid_01

2. Use the 17mm wrench and the adjustable wrench to remove the drain tube fitting from the solenoid retaining fitting. Hold the solenoid retaining fitting steady with one wrench, while you unscrew the drain tube fitting with the other wrench.
Lucca_A53_brew_solenoid_02
Lucca_A53_group_obstruction_01


3. Use the 17mm wrench to remove the solenoid retaining fitting from the valve shaft.
Lucca_A53_group_obstruction_02
Lucca_A53_brew_solenoid_03

4. Slide the solenoid box off of the valve shaft and set aside. (Be careful not to lose the washers that go between the box and the retaining fitting).
Lucca_A53_group_obstruction_03-1

5. Use the 22mm wrench or a large adjustable wrench to unscrew the valve shaft from the brass valve base.
Lucca_A53_brew_solenoid_04
Lucca_A53_group_obstruction_04

6. Inspect and clean the solenoid shaft and piston. Make sure the pink rubber seat is intact and free of debris. Check to ensure that the internal piston springs move freely and are free from debris.
Lucca_A53_brew_solenoid_05
Lucca_A53_group_obstruction_05
Lucca_A53_group_obstruction_07

Lucca_A53_group_obstruction_08


7. Use the 3mm Allen key or hex driver to dismount the brass valve base from the group head. Clean the two passages and make sure the o-ring gaskets are in good condition.
Lucca_A53_brew_solenoid_06
Lucca_A53_brew_solenoid_07

Lucca_A53_brew_solenoid_08
*NOTE: If you're troubleshooting a no-flow condition from your A53's group head, it may be necessary to dismount the group head to clear its passages of any potential obstructions.

8. Use these instructions in reverse to reassemble the group head solenoid.