how to change carbon brush for DP6388B airless sprayer

how to change carbon brush for DP6388B DIY airless sprayer?

please download the instruction here

this is the instruction to teach how to change the carbon brush.

The motor for DP6388B / 6310 is high speed (about 15000rpm at free-loading, and about 8000rpm with loading)

so the carbon brush is much more faster worn than the normal PMDC motor.

we recommend the user to change the carbon brush for 6388B/ 6310 after 160 – 180 hours working time.