Graco ULTRA 500 Instructions-Parts List Manual page 7

Setup
PRESSURE ADJUSTING KNOB
ON/OFF SWITCH
PRESSURE
PACKING NUT/ WET–CUP
DRAIN
VALVE
FILL 1/3 FULL WITH TSL
1/4 npsm(m) FLUID OUTLET NIPPLE
DO NOT INSTALL ANY SHUTOFF
DEVICE HERE
Fig. 2