Below are steps to replacing the brew pressure gauge on the M58. Before you can do this you need to remove the panels on the machine, shown here. Before doing this, make sure your machine is unplugged from it's power source, any direct plumbing lines are closed and the machine is fully cooled off. Tool needed:
- adjustable wrench
- long Phillips screw driver
First, remove the capillary tube fitting that connects the brew gauge to the pump using an adjustable wrench.
At this point the motor and pump can be lifted out of it's seating and shifted to the left or right to access the brew gauge bracket easier.
Now, use the long Phillips screw driver to loosen the gauge bracket. Remove the bracket holding the gauge in place, pull the gauge out through the front of the machine and insert the new gauge in through the hole.