Graco 3400 User Manual download pdf (Page 6)

Troubleshooting

6 310813 Rev C

Troubleshooting

Problem Cause Solution

Engine will not start Engine switch is OFF Turn engine switch ON

Engine is out of gasoline Refill gas tank. Honda Engines

Owner's Manual.

Engine oil level is low Try to start engine. Replenish oil, if

necessary. Honda Engines Owner's

Manual.

Spark plug is disconnected of dam-

aged

Connect spark plug cable or replace

spark plug

Cold engine Use choke

Fuel shutoff lever is OFF Move lever to ON position

Oil is seeping into combustion

chamber

Remove spark plug. Pull starter 3 to 4

times. Clean or replace spark plug.

Start engine. Keep sprayer upright to

avoid oil seepage

Engine operates, but displacement

pump does not operate

Pump switch is OFF Turn pump switch ON

Pressure setting too low Turn pressure adjusting knob clock-

wise to increase pressure.

Fluid filter (29) is dirty Clean filter. Page 22.

Tip or tip filter is clogged

Clean tip or tip filter. Manual 309639.

Displacement pump piston rod is

stuck due to dried paint

Repair pump. Manual 309250.

Connecting rod is worn or damaged

Replace connecting rod. Page 8.

Drive housing is worn or damaged Replace drive housing. Page 8.

Electrical power is not energizing

clutch field

Check wiring connections. Page 11.

Reference pressure control repair. Page 13.

Reference wiring diagram. Page 23.

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 +0.2Ω; if not,

replace pinion housing.

Have pressure control checked by authorized

Graco dealer

Clutch is worn, damaged, or incor-

rectly positioned

Adjust or replace clutch. Page 9.

Pinion assembly is worn or damaged Repair or replace pinion assembly. Page 9.

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Graco 3400 User Manual Page 6

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