Hitachi 236464 manual Troubleshooting Chart, Its stroke keep the wet-cup 1/3 filled with a

Page 13

Troubleshooting Chart

WARNING

To reduce the risk of serious injury whenever you are instructed to relieve pressure, always follow the Pressure Relief Procedure on page 10.

1.Relieve the pressure.

2.Check all possible causes and problems before disassembling the pump.

PROBLEM

 

CAUSE

SOLUTION

 

 

 

The pump fails to oper-

Valves are closed or clogged.

Clear the air line; increase the air supply.

ate.

 

 

 

Check that the valves are open.

 

 

 

 

 

 

 

 

The fluid hose or gun is obstructed.

Clear the hose or gun*;

 

 

 

 

use a hose with a larger ID.

 

 

 

 

 

 

 

 

Fluid has dried on the displacement rod.

Clean the rod; always stop the pump at the bottom

 

 

 

 

of its stroke; keep the wet-cup 1/3 filled with a

 

 

 

 

compatible solvent.

 

 

 

 

 

 

 

 

Air motor parts are dirty, worn, or dam-

Clean or repair the air motor;

 

 

 

aged.

see the separate motor manual.

 

 

 

 

 

The

pump

operates,

The air line is restricted or the air supply

Clear the air line; increase the air supply.

but the output is low on

is inadequate. Valves are closed or

Check that the valves are open.

both strokes.

 

clogged.

 

 

 

 

 

 

 

 

 

The fluid hose or gun is obstructed;

Clear the hose or gun*;

 

 

 

the fluid hose ID is too small.

use a hose with a larger ID.

 

 

 

 

 

 

 

 

Worn packings in the displacement

Replace the packings.

 

 

 

pump.

 

 

 

 

 

 

 

 

 

Air motor parts are dirty, worn, or dam-

Clean or repair the air motor;

 

 

 

aged.

see the separate motor manual.

 

 

 

 

 

 

 

 

Held open or worn intake valve.

Clear or service the intake valve.

 

 

 

 

 

The

pump

operates,

Held open or worn intake valve.

Clear or service the intake valve.

but the output is low on

 

 

the downstroke.

 

 

 

 

 

 

 

The

pump

operates,

Held open or worn piston valve

Clear the piston valve; replace the packings.

but the output is low on

or packings.

 

the upstroke.

 

 

 

 

 

 

 

 

The

pump’s

speed is

The fluid supply is exhausted.

Refill the supply and prime the pump.

erratic or accelerated.

 

 

 

 

 

 

 

 

 

 

Held open or worn piston valve

Clear the piston valve; replace the packings.

 

 

 

or packings.

 

 

 

 

 

 

 

 

 

Held open or worn intake valve.

Clear or service the intake valve.

 

 

 

 

 

*To determine if the fluid hose or gun is obstructed, relieve the pressure. Disconnect the fluid hose and place a container at the pump fluid outlet to catch any fluid. Turn on the air just enough to start the pump. If the pump starts when the air is turned on, the obstruction is in the fluid hose or gun.

NOTE: If you experience air motor icing, call your Graco distributor.

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Contents Dura-Flot600 Pumps Instructions Parts ListList of Models Table of ContentsEquipment Misuse Hazard SymbolsMoving Parts Hazard Injection HazardToxic Fluid Hazard Fire and Explosion Hazard308350 System Accessories InstallationGeneral Information Grounding Object being sprayed follow your local codeAir Line Accessories KEY Typical InstallationPressure Relief Procedure Operation/MaintenancePacking Nut/Wet-Cup 110Flush the Pump Before First Use Starting and Adjusting the PumpFlushing Shutdown and Care of the PumpIts stroke keep the wet-cup 1/3 filled with a Troubleshooting ChartCompatible solvent Disconnecting the Displacement Pump ServiceReconnecting the Displacement Pump Required Tools107 106 110 109 101 105 108Disassembly Displacement Pump ServiceTorque to 258-285 NSm 190-210 ft-lb Reassembly 10 Ref 11 Ref Housing 7 onto the cylinder handtight. Install the seal 11* on the bottomSealing surface of the intake housing Using a pipe wrench, torque the intake housing101 105 108 109 102Y 107 106 110 Parts102Y 107 106 110 101 105 108 109 Part No Pump, Series a 251 Ratio, with Senator Air Motor102Y 107 110 106 112 113Piston Packing Stack See Throat Packing Stack seeTeflonr Packing Kit 237236 Optional Packing KitsUHMWPE/Leather Packing Kit 237238 Optional UHMWPE/PTFErPacking Kit 237609 OptionalTested in accordance with ISO Technical DataLiters/min 11.4 Mounting Hole Layout DimensionsGraco Information Graco Standard Warranty

236464 specifications

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