Troubleshooting - Graco LineLazer 3400 Operation - Repair - Parts

Troubleshooting

Troubleshooting
Problem
Engine will not start
Engine operates, but displacement
pump does not operate
22
Cause
Engine switch is OFF
Engine is out of gasoline
Engine oil level is low
Spark plug is disconnected or dam-
aged
Cold engine
Fuel shutoff lever is OFF
Oil is seeping into combustion
chamber
Pump switch is OFF
Pressure setting too low
Fluid filter (104) is dirty
Tip is clogged
Displacement pump piston rod is
stuck due to dried paint
Connecting rod is worn or damaged Replace connecting rod. Page 24.
Drive housing is worn or damaged
Electrical power is not energizing
clutch field
Clutch is worn, damaged, or incor-
rectly positioned
Pinion assembly is worn or damaged
Solution
Turn engine switch ON
Refill gas tank. Honda Engines
Owner's Manual.
Check oil level. Replenish oil, if neces-
sary. Honda Engines Owner's Manual.
Connect spark plug cable or replace
spark plug
Use choke
Move lever to ON position
Remove spark plug. Pull starter 3 to 4
times. Clean or replace spark plug.
Start engine. Keep sprayer upright to
avoid oil seepage
Turn pump switch ON
Turn pressure adjusting knob clock-
wise to increase pressure.
Clean filter. Page 18.
Clean tip. Page 17.
Repair pump. Manual 309250.
Replace drive housing. Page 24.
Check wiring connections. Page 32, 42.
Reference pressure control repair.
Page 32.
Reference wiring diagram. Page 42.
With pump switch ON and pressure
turned to MAXIMUM, use a test light to
check for power between clutch test
points on control board.
Remove clutch wires from control board
and measure resistance across clutch
coil. At 70° F, the resistance must be
between 1.2+0.2 ohms; if not, replace
pinion housing.
Have pressure control checked by
authorized Graco dealer.
Adjust or replace clutch. Page 27.
Repair or replace pinion assembly. Page
27.
3A4587B Operation, Repair, Parts