Troubleshooting

Low or Fluctuating Output (continued)

 

PROBLEM

CAUSE

SOLUTION

 

 

 

 

 

Motor runs and pump strokes

No material supply.

Refill hopper and re-prime pump.

 

 

 

Clean hopper strainer.

 

 

 

 

 

 

Loose fittings.

Tighten; use thread sealant or sealing

 

 

 

tape on threads if necessary.

 

 

 

 

 

 

Intake valve ball and piston ball are not seat-

Remove intake and piston valves and

 

 

ing properly.

clean. Check balls and seats for nicks or

 

 

 

obstructions; replace if necessary, page

 

 

 

18. Also check piston valve seat for

 

 

 

hardened material or nicks and replace

 

 

 

if necessary. Clean hopper before using

 

 

 

to remove particles that could clog

 

 

 

pump.

 

 

 

 

 

 

Leaking around throat packing nut which may

Replace packing, page 18.

 

 

indicate worn or damaged packings.

 

 

 

 

 

 

 

Pump rod damage.

Repair pump.

 

 

 

 

 

Motor runs but pump does not

Displacement pump pin (damaged or miss-

Replace pump pin if missing. Be sure

 

stroke

ing).

retainer spring (76) is fully in groove all

 

 

 

around connecting rod.

 

 

 

 

 

 

Connecting rod assembly is damaged.

Replace connecting rod assembly.

 

 

 

 

 

 

Gears or drive housing.

Inspect drive housing assembly and

 

 

 

gears for damage. Replace if needed.

 

 

 

 

 

Motor intermittently stops while

 

See RF Problems, page 18.

 

applying material

 

 

 

 

 

 

Electrical Short

 

 

PROBLEM

CAUSE

SOLUTION

 

 

 

Building circuit breaker opens as

Electrical wiring insulation damaged, termi-

Repair or replace damaged wiring or

soon as power switch is turned on.

nals fit loose or are damaged. Also wires

terminals. Securely reconnect all

CAUTION

between motor control and motor.

wires.

Any short in any part of the motor

 

 

Motor armature is shorted.

Replace motor. Inspect windings for

power circuit will cause the control

 

burns. Perform motor control board

circuit to inhibit drywall feed pump

 

diagnosis.

operation. Correctly diagnose and

 

 

Motor control board.

Replace with a new control board if

repair all shorts before checking

 

necessary. Perform motor control

and replacing control board.

 

 

board diagnosis.

 

 

 

 

 

Building circuit breaker opens as

Basic Electrical Problems, see page 15.

Perform necessary procedures.

soon as unit is plugged into outlet

 

 

For damaged or pinched wires in pressure

Replace damaged parts.

and unit is NOT turned on.

control.

 

 

 

 

Drywall feed pump quits after unit

Basic Electrical Problems.

Perform necessary procedures.

operates for 5 to 10 minutes.

 

 

Check electrical supply with volt meter.

If voltage is too high, do not operate

 

Meter must read:

drywall feed pump until corrected.

 

210-255 Vac for 220-240 Vac models;

 

 

85-130 Vac for 100-120 Vac models.

 

 

 

 

3A0245B

17

Page 16 Page 18
Page 17
Image 17
Graco 258907, 262300, 262288, 258906, 257100 manual Electrical Short, Basic Electrical Problems , see
Page 16 Page 18

258907, 262288, 262300, 258906, 257100 specifications

Graco, a well-known name in the field of paint sprayers and equipment, offers a range of products designed for both professionals and DIY enthusiasts. Among their popular models are the Graco 257100, 258906, 262300, 262288, and 258907. These units are engineered to deliver high performance, efficiency, and versatility, making them ideal for various painting tasks.

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In conclusion, Graco's range of sprayers, including the 257100, 258906, 262300, 262288, and 258907, offers advanced technology and features tailored for various painting needs, ensuring smooth and professional results for every project.
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