3105486
Troubleshooting

Relieve pressure;page 5.

PROBLEM CAUSE SOLUTION
Gasengine pulls hard (won’t start) Hydraulicpressure is too high Turnhydraulic pressure knob counterclockwise
to lowest setting
Gasengine will not start Switch OFF,lo w oil, no gasoline Consultengine manual, supplied
Gasengine doesn’t work properly
Elevation
Consultengine manual, supplied.
Referto 6.5 HP Engine Repair Kit, 246311.
Gasengine operates, but displace-
mentpump doesn’t operate
Pumpvalve is OFF Setpump valve ON
Pressuresetting too low Increasepressure. See manual 309548
Displacementpump outlet filter (if
used)is dirty or clogged
Cleanfilter
Tipor tip filter (if used) is clogged Removetip and/or filter and clean
Hydraulicfluid too low Shutoff sprayer. Add fluid*. See page 5.
Beltworn or broken Replace.
Hydraulicpump worn or damaged Bringsprayer to Graco distributor forrepair
Driedpaint seized paint pump rod Service pump.See manual 309277.
Hydraulicmotor not shifting Setpump valveOFF. Turn pressure down.
Turnengine OFF. Pry rod up or down untilhy-
draulicmotor shifts.
Displacementpump operates, but
outputis low on upstroke
Pistonball check not seating properly.
Pistonpackings worn or damaged.
Servicepiston ball check. See manual 309277.
Replacepackings. See manual 309277.
Displacementpump operates but
outputis low on downstroke and/or
onboth strokes
Pistonpackings worn or damaged.
Intakevalve ball check not seating
properly.
Suctiontube air leak
Tightenpacking nut or replace packings. See
manual309277.
Serviceintake valve ball check. See manual
309277.
Tightensuction tube
Paintleaks and runs over side of
wet-cup
Loosewet-cup
Throatpackings worn or damaged
Tightenpacking nut enough to stop leakage
Replacepackings. See manual 309277
Excessiveleakage around hydraulic
motorpiston rod wiper
Pistonrod seal worn or damaged Replacethese parts.
Fluiddelivery is low Pressuresetting too low
Displacementpump outlet filter (if
used)is dirty or clogged
Intakeline to pump inlet is not tight
Hydraulicmotor is worn or damaged
Largepressure drop in fluid hose
Increasepressure. See manual 309548.
Cleanfilter
Tighten
Bringsprayer to Graco distributor for repair
Uselarger diameter or shorter hose
Thesprayer overheats Paintbuildup on hydraulic components Clean
Oillevel is low Fillwith oil. See page 5.
Spittingfrom gun Airin fluid pump or hose Checkfor loose connections on siphon
assembly,tighten, then reprime pump
Looseintake suction Tighten
Fluidsupply is low or empty Refillsupply container
Excessivehydraulic pump noise Lowhydraulic fluid level Shut off sprayer.Add fluid*. See page 5.
*Checkhydraulic fluid level often. Do not allowit to become too low. Use only Graco approved hydraulicfluid, page 5.