- ① The O-ring repair kit is primarily designed to address issues with leaking hot water or reduced coffee output caused by seal failure in the hot water valve of Philips 4300 and similar coffee machines.
- ② The expanded repair kit includes five sizes of O-rings: 50-20 and 90-20 for use outside the boiler pin, EX20 and EX60 for use inside the boiler pin, and 40-40 for use in the brew group.
- ③ The expanded repair kit requires using a T10 Torx wrench to remove the screw on the boiler pin in order to replace the internal O-rings.
- ④ All O-rings are made of food-grade silicone material and applying a small amount of food-grade grease during use will improve sealing performance.
- ⑤ Prior to installation, ensure that the coffee machine is powered off and the water has cooled to avoid the risk of burns or other hazards. Please read the instruction manual and check compatibility before use.
