how much oil should I add into the diaphragm pump sprayer?

we always got questions from our clients that how many liters hydraulic oil should be add into the diaphragm pump ?

please see below confirmation:

DP6818:  0.95 – 1.0L  (2 – 3mm distance to the top level)

DP6820:  0.8 – 0.9L (5 – 10mm distance to the top level)

DP6825 / 6830 / 6835:  1.0L  (10mm distance to the top level)

DP6845 / 6800:  1.1L (3mm distance to the top level)

The oil is 46# anti-wear hydraulic oil normally. but you can chose Good quality oil like Shell Tellus High Performance Hydraulic Oil 46# .   The oil is about 85-90% full, MUST not 100% full. please see below picture.