Graco Inc 800295, 308-507 manual SHUTDOWN, Flushing and Storage, Maintenance, Troubleshooting Chart

Page 7

SHUTDOWN, FLUSHING AND STORAGE

WARNING

Pressure Relief Procedure

 

To reduce the risk of serious bodily injury

,

including fluid injection and splashing in the eyes, or on the skin, always follow this procedure whenever you stop spraying for more than 10 minutes, when shutting down, and before checking or repairing any part of the system.

1.Engage the trigger safety latch.

2.Turn the air supply off.

3.Disconnect the air supply.

4.Shut off the water supply.

5.Disengage the trigger safety latch and trigger the gun to relieve pressure, and then engage the trigger safety latch again.

6.Before long–term (overnight) storage or transporting of the unit, disconnect the water supply, and disconnect the air supply.

MAINTENANCE

Observing regular maintenance intervals helps ensure that you get maximum performance and life from the pressure washer.

WARNING

To reduce the risk of serious bodily injury

,

including fluid injection, splashing in the eyes or

 

on the skin, or injury from moving parts, always

 

follow the Pressure Relief Procedure Warning before proceeding.

1.If the pressure washer will be exposed to freezing temperatures, drain all water out of the pump. If it must be stored in freezing temperatures, flush the unit with a 50% anti–freeze solution. Relieve pressure. Flush the pressure washer before using it again to remove the anti–freeze.

CAUTION

If water does freeze in the pressure washer, thaw it in a warm room before trying to start it. DO NOT pour hot water on or into the pump!

2.After each use, wipe all surfaces of the pressure washer with a clean, damp cloth.

3. Perform

the appropriate maintenance. See

maintenance chart.

 

 

Interval

What to do

 

 

Daily

Clean water inlet screen and filter.

 

Lubricate air motor (if there is not automatic

 

oiling) by placing 15 drops of light machine

 

oil in the pump air inlet.

Each 40

Check that the packing nut is tight. Tighten

hours of

snug. Overtightening will damage

operation

packings. See the appropriate pump

 

Instruction-Parts List.

TROUBLESHOOTING CHART

WARNING

To reduce the risk of serious bodily injury, including fluid injection, splashing in the eyes or on the skin, or injury from moving parts, always follow the Pressure Relief Procedure Warning before proceeding.

Problem

Cause

Solution

 

 

Pump does not

Loose or broken pump parts.

Disassemble, check, repair.

 

 

operate or no water

Restricted line or inadequate air supply.

Clear, increase.

 

 

flow

Exhausted water supply.

Refill.

 

 

 

Clogged fluid hoses.

Clean or replace.

 

 

 

Fluid intake or piston valves need

Adjust.

 

 

 

adjustment.

See separate air motor Instruction Manual.

 

 

 

Damaged air motor.

 

 

 

Pump operates but

Insufficient air supply.

Increase.

 

 

output is low

Exhausted water supply.

Refill.

 

 

 

Obstructed gun or tip.

Clear.

 

 

 

Damaged pump packings.

Replace.

 

 

 

Piston or intake valve worn or held open.

Repair. See separate pump Instruction Manual.

 

 

Frequent or

Running pump dry.

Do not run pump without water.

 

 

premature failure of

Abrasive material in the fluid being pumped.

Install proper filtration on pump inlet plumbing.

 

 

the packings

Inlet water temperature too high.

Check water temperature; may not exceed 200_ F

 

 

 

Overpressurizing pump or excessive cycle

Check inlet air pressure. Adjust regulator if

 

 

 

rate.

necessary.

 

 

Erratic or accelerated

Exhausted water supply.

Refill.

 

 

operation

Fluid intake or piston valve worn.

Repair. See separate pump Instruction Manual.

 

 

 

 

 

 

 

 

 

308–507

7

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Contents 800-295, Series a Rev B Supersedes a800-412, Series a 800-413, Series aMedical Treatment General SafetyPressure Relief Procedure Spray Gun Safety DevicesTerms Hose SafetyEquipment Misuse Hazard Moving Parts HazardConnect to Water Supply InstallationSet Up Check for Shipping DamageOperation Adjustable Nozzle 800-412Cleaning StartupInstalling and Changing Spray Tips 800-295 only Trigger Safety LatchFollow the Pressure Relief Procedure Troubleshooting Chart MaintenanceSHUTDOWN, Flushing and Storage Parts Drawing 800-412 51 Monark Cart Mounted Hydra-CleanrPressure WasherPart Description QTY Parts ListParts Drawing GUN & Wand Assembly 4952 29 30 Chassis President Performance ChartAccessories Technical DataImportant Phone Numbers Graco WarrantyGraco INC. P.O. BOX 1441 MINNEAPOLIS, MN