Hitachi 206405, SERIES J, SERIES K, 206699, 206700 warranty Troubleshooting, Problem Cause Solution

Page 12

Troubleshooting

WARNING WARNING

To reduce the risk of serious injury whenever you are instructed to relieve pressure, always follow the Pressure Relief Procedure on page 8.

Relieve the Pressure before you check or service any system equipment.

Never operate the pump with the warning plate

(20)or the identification plate (40) removed. These plates protect your fingers from pinching or ampu- tation by moving parts in the air motor.

NOTE: Check all other possible problems and solu- tions before disassembling the pump.

Problem

Cause

Solution

 

 

 

Pump fails to operate

Low air supply pressure or restricted air

Increase air supply; clear*

 

lines

 

 

 

 

 

Closed valves

Open

 

 

 

 

Clogged fluid lines, hoses, valves, etc.

Clear*

 

 

 

 

Damaged air motor

Service air motor

 

 

 

 

Empty fluid supply container

Refill and reprime, or flush

 

 

 

Continuous air exhaust

Worn or damaged air motor gasket,

Service air motor

 

packing, seal, etc.

 

 

 

 

Erratic pump operation

Empty fluid supply container

Refill and reprime, or flush

 

 

 

 

Held open or worn intake valve or

Clear; service

 

piston packings

 

 

 

 

Pump operates, but output is low

Held open or worn piston

Clear; service

on the up stroke

or packings

 

 

 

 

Pump operates, but output is low

Held open or worn intake valve

Clear; service

on the down stroke

 

 

 

 

 

Pump operates, but output is low

Low air supply pressure or

Increase air supply; clear*

on both strokes

restricted air lines

 

 

 

 

 

Closed valves

Open

 

 

 

 

Empty fluid supply container

Refill and reprime, or flush

 

 

 

 

Clogged fluid lines, hoses, valves, etc.

Clear*

 

 

 

 

Packing nut too tight

Loosen

 

 

 

 

Loose packing nut or worn packings

Tighten; replace

 

 

 

*Follow the Pressure Relief Procedure on page 8. Disconnect the fluid hose. If the pump starts when the air is turned on again, the hose or gun is clogged.

12 306531

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Contents Instructions Parts List Table of ContentsSymbols Equipment Misuse HazardSkin Injection Hazard Fire and Explosion Hazard 306531 Installation System AccessoriesGrounding To ground the pumpPressure Relief Procedure Starting and Adjusting the PumpOperation 306531 Maintenance Shutdown and General CareFlushing LubricationPacking Nut Adjustment Troubleshooting Problem Cause SolutionAir Motor Service Air Motor & Throat DisassemblyBefore you start Reassembly 30 31 34 † 33 † 45 † 32 † 58 53† 33† 45†Air Motor Service Displacement Pump Service Displacement Pump DisassemblyDisplacement Pump Service Parts Model 206405, Series K 35 lb. pail size 4738 34 † 33 † 53 † 32 † 45† 44* 43 39† 17* 16* 15* 13 7*† Model 206699, Series J 120 lb. drum size Page Dimensions Technical DataMounting Hole Layout Graco Standard Warranty Graco Phone Numbers