Graco Inc 800-053, 801-392, 2104E manual Cause, Photo 1 and

CAUSE

ectrtc motor wont run.	Power cord unplugged, or	Check, replace
	building circuit fuse blown
	Overload switch has opened.	Unplug power cord+, decrease pressure.
	Power.cord unplugged, or	Check, replace.
	building circuitfuse blown,
	Overload breaker has opened.	Unplug power cord*, relieve pressure-allow
		tO.CO01.
	Extension cord.	Don't use morethan 100ftof 12ga extension cord.
	Tip plugged.	Remove and clean.
Electric motor runs, but	Displacement pump frozen or	Thaw.
no output.	gear train damage.

*This unit has an overload breakerbuilt into the switchassembly. If it opens, unplug power cord and letsprayer cool for 30 to 60 minutes. Also, try tocorrect the cause of overheating. Alwaysuse the lowest pressure setting needed.

NOTE: A M11 and M30 metricwrenches are required for servicing pump.

PUMP

Valves

Photo 1 and 2.

1 ) Remove the hex plug using an M30 wrench.

2)Examine O-ring underplugandreplaceif evidence of cuts or distortion.

3)Remove valve assembly includingretainer, spring, valve and valve seat from valve cavity.

NOTE: Valve assembly may come apart during removal.

4)Replace valve parts with service kit (801-041) includingretainer,spring, valve, valve seat, o- ring and back-up-ring.

5)Replace valve cover and torque to 75 ft-lb (100 Nm) .

Pumping Section

Photo 3.

1)Remove the four (4)hex nuts from the manifold.

2)Separate the manifold from thecrankcase.

NOTE: It may be necessary totapmanifold lightly with mallet to loosen.

CAUTION

Keep manifold properly alignedwith ceramic plungers when removing to avoid damage to either plungers or seals.

3)Carefully examine each plunger for any scoring and replace if necessary.

6801-392