Graco 256200 important safety instructions Troubleshooting, Problem Cause Solution

Page 21

Troubleshooting

Troubleshooting

Problem

Cause

Solution

 

 

 

 

 

 

The pump fails to operate.

Dirty or worn air motor.

Clean, service.

 

 

 

 

Inadequate air supply or

Clean lines or increase the air

 

restricted lines.

supply (see Technical Data).

 

 

 

 

Closed or clogged air valves.

Open or clear the valves.

 

 

 

 

Clogged fluid hose or valve.

Clear the hose or valves.

 

 

 

 

Worn or damaged valves or

Service the valves or seals.

 

seals.

 

 

 

 

The pump operates, but the

Clogged fluid hose or valve.

Clear the hose or valves.

output is low on both strokes.

 

 

Low or empty fluid supply.

Refill the fluid supply and rep-

 

 

rime the pump.

 

 

 

 

Worn or damaged valves or

Service the valves or seals.

 

seals.

 

 

 

 

The pump operates, but the

Held open or worn intake

Clear or service the valve.

output is low on the down-

valve.

 

stroke.

 

 

Worn or damaged valves or

Service the valves or seals.

 

seals.

 

 

 

 

The pump operates, but the

Held open or worn piston

Clear or service the valve.

output is low on the upstroke.

valve.

 

 

 

 

 

Worn or damaged valves or

Service the valves or seals.

 

seals.

 

 

 

 

Erratic or accelerated opera-

Low or empty fluid supply.

Refill the fluid supply and rep-

tion.

 

rime the pump.

 

 

 

 

Broken air motor compression

Replace the spring.

 

spring.

 

 

 

 

Pump slowly moves after fluid

Clogged or dirty intake valve

Clean ball and seat.

shutoff in downstroke.

check ball.

 

 

 

 

 

Worn or damaged valves or

Install repair kit.

 

seats.

 

 

 

 

Pump slowly moves after fluid

Clogged or dirty lower piston

Clean ball and seat.

shutoff in upstroke.

ball or seat.

 

 

 

 

 

Worn or damaged valves or

Install repair kit.

 

seats.

 

 

 

 

312766N

21

Image 21
Contents Ratio Transfer Pump Contents Toxic Fluid or Fumes Hazard Equipment Misuse Hazard Moisture Sensitivity of Isocyanates Isocyanate HazardFoam Self-Ignition Keep Components a and B SeparateChanging Materials Typical Installation without Circulation Typical InstallationTypical Installation with Circulation Typical Installation with CirculationTypical Installation for Lubrication Applications Typical Installation for Lubrication ApplicationsSystem Accessories InstallationSetup Grounding Pressure Relief Procedure OperationFlush Pump Before Use Daily Shutdown Daily StartupAir Motor Disassembly RepairBefore you start Air Motor Reassembly Unscrew the piston cylinder 58 from the pump frame Pump Lower DisassemblyPush down on the pump connecting rod Series a and B Pump Lower ReassemblyTI21636a Problem Cause Solution TroubleshootingT1 21 Ratio Transfer Pump PartsPart Description Qty Grounding Clamp AccessoriesAir Regulator and Gauge Dimensions See Performance Chart on Technical DataCalculate Fluid Outlet Pressure black curves Performance ChartTechnical Data 312766N Graco Information Graco Standard Warranty