32
Quarterly Preventative Maintenance Guide
•
Replace portafilter gaskets
8.5mm
-
1.3441 (standard size)
9.0mm
-
1.3430 (for older handles with worn ears)
Inspect and replace group diffuser screens if worn or damaged
Synesso reinforced screen
-
1.3292
•
Inspect portafilter baskets for wear or damage. Replace if necessary
14 gram basket
-
1.7000
18 gram basket
-
1.7090
21 gram basket
-
1.7170
•
Inspect and/or rebuild steam valves if signs of leaking. Clean and lubricate wand pivot ball and pusher
face
Rebuild kit
-
1.7320
Complete valve
-
1.4501
•
Remove and clean steam tips
•
Check flow rate at each brew group. Minimum 2oz in 6
-
8 seconds
•
Check that expansion valve does not leak at 9 bar. 11
-
12 bar is the factory standard setting
Expansion valve
-
1.4070
•
Check line and pump pressures
•
Inspect steam tank vacuum breaker. Replace if signs of leaking
Vacuum breaker
-
1.4265
•
Inspect steam tank pressure relief valve (dark spots may indicate leaking). Replace if signs of leaking
Pressure relief valve
-
1.4100
•
Depressurize steam and brew systems, check that gauges return to zero. Replace if not accurate
0
-
60psi steam gauge
-
1.4083
0
-
300psi brew gauge
-
1.3373
•
Remove and inspect level probes. Clean scale if necessary
Upper level probe (fill probe)
-
1.4111
Lower (safety) probe
-
1.4112
•
Inspect drain hose for clogs or leaks
•
Check steam handles for grit, friction, or contacts. Lubricate and adjust as needed
•
Test handheld controller for proper operation. All buttons react as normal
