Graco 965124, 965129 important safety instructions Troubleshooting, Problem Cause Solution

Page 8

Troubleshooting

WARNING

To reduce the risk of serious injury whenever you are instructed to relieve pressure, always follow the Pressure Relief Procedure on page 7.

Before servicing this equipment always make sure to Relieve the Pressure.

Note: Check all possible problems and solutions before disassembling the pump.

Problem

Cause

Solution

 

 

 

Pump fails to operate.

Inadequate air supply pressure or

Increase air supply; clear

 

restricted air lines

 

 

 

 

 

Closed or clogged valves

Open; clean

 

 

 

 

Clogged fluid lines, hoses, valves,

Clear*

 

etc.

 

 

 

 

 

Damaged air motor

Service air motor

 

 

 

 

Exhausted fluid supply

Refill and reprime, or flush

 

 

 

Continuous air exhaust

Worn or damaged air motor gasket,

Service air motor

 

packing, seal, etc.

 

 

 

 

Erratic pump operation

Exhausted fluid supply

Refill and reprime, or flush

 

 

 

 

Held open or worn intake valve or

Clear; service

 

piston packings

 

 

 

 

Pump operates, but output low on

Held open or worn piston or packings

Clear; service

upstroke

 

 

 

 

 

Pump operates, but output low on

Held open or worn intake valve

Clear; service

downstroke

 

 

 

 

 

Pump operates, but output low on

Inadequate air supply or restricted air

Increase air supply; clear

both strokes

lines

 

 

 

 

 

Closed or clogged valves

Open; clean

 

 

 

 

Exhausted fluid supply

Refill and reprime, or flush

 

 

 

 

Clogged fluid lines, hoses, valves,

Clear*

 

etc.

 

 

 

 

 

Loose packing nut or worn packings

Tighten; replace

*Follow the Pressure Relief Procedure, and disconnect the fluid line. If the pump starts when the air is turned back on, the fluid line, hose, valve, etc. was clogged.

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Contents Important Safety instructions Instructions Parts ListLow-pressure, medium volume pump used to transfer grease Table of Contents SymbolsFire and Explosion Hazard Equipment Misuse Hazard Mounting the Pump InstallationGrounding Typical Installation KeyMaintenance Pressure Relief ProcedureStartup and Adjustment OperationTroubleshooting Problem Cause Solution309407 Service Displacement Pump Repair DisassemblyReassembly Follow the Pressure Relief Procedure onCheck Valve Adjustment 309407 Parts Description Qty Dimensions Mounting Hole LayoutSound Pressure Level Technical DataSound Power Level Toll Free Graco Standard WarrantyGraco Information