Maintenance schedule

[prb4 6]

Hi

I have 3 Ultimaker 2+ machines that run almost constantly. I regularly clean and lubricate them and change the TFM coupler as required.

I was wondering if there is a recommended maintenance schedule for the other parts?

I notice that a Ultimaker 2+ maintenance kit is available containing the following parts:

PT100 B Sensor Glass Fiber

TFM 2x

Fan Pack

Bowden Tube Pack

Olsson Nozzle 0.4

Hot End Isolator

Pulley Pack

Glass Plate

Build Platform Glass Retainer Back (2x)

Calibration Card

Sliding Blocks 4x

Magnalube / Grease

Timing Belt GT2 200 (2x)

Timing Belt GT2 610 (4x)

Heater Cartridge 24V 35W

Injection Molding Part/Print Head Aid

Sewing Machine Oil

How often should I change the parts in this kit?

There are two TFM couplers, does this mean I should change all the belts, glass plate and nozzle every time I change the TFM coupler twice?

I've never change the nozzle (I only print non abrasive PLA), should I expect to need to change it? and how often?

I will be interested to know if there is an official recommended maintenance schedule and what other people actually do?

Thanks

Peter