Hitachi 288466 User Manual

Instructions

Displacement Pump

- For portable spray application of architectural paints and coatings -

Model 288466, 288467, 288468, 288819

3300 psi (22.8 MPa, 25 bar) Maximum Working Pressure

Important Safety Instructions

Read all warnings and instructions in this manual. Save these instructions.

311845C

Model 288819

Graco Inc. P.O. Box 1441 Minneapolis, MN 55440-1441

Model 288466

Model 288467/288468

Ti8844a

Warnings

The following warnings are for the setup, use, grounding, maintenance, and repair of this equipment. The exclamation point symbol alerts you to a general warning and the hazard symbol refers to procedure-specific risk. Refer back to these warnings. Additional, product-specific warnings may be found throughout the body of this manual where applicable.

WARNING

EQUIPMENT MISUSE HAZARD

Misuse can cause death or serious injury.

• Do not operate the unit when fatigued or under the influence of drugs or alcohol.

• Do not exceed the maximum working pressure or temperature rating of the lowest rated system component. See Technical Data in all equipment manuals.

• Use fluids and solvents that are compatible with equipment wetted parts. See Technical Data in all equipment manuals. Read fluid and solvent manufacturer’s warnings. For complete information about your material, request MSDS forms from distributor or retailer.

• Check equipment daily. Repair or replace worn or damaged parts immediately with genuine manufacturer’s replacement parts only.

• Do not alter or modify equipment.

• Use equipment only for its intended purpose. Call your distributor for information.

• Route hoses and cables away from traffic areas, sharp edges, moving parts, and hot surfaces.

• Do not kink or over bend hoses or use hoses to pull equipment.

• Keep children and animals away from work area.

• Comply with all applicable safety regulations.

MOVING PARTS HAZARD

Moving parts can pinch or amputate fingers and other body parts.

• Keep clear of moving parts.

• Do not operate equipment with protective guards or covers removed.

• Pressurized equipment can start without warning. Before checking, moving, or servicing equipment, follow the Pressure Relief Procedure in this manual. Disconnect power or air supply.

2 311845C

Service

Pressure Relief Procedure

The system pressure must be manually relieved to prevent the system from starting or spraying accidentally. To reduce the risk of an injury from accidental spray from the gun, splashing fluid, or moving parts, follow the Pressure Relief Procedure whenever you,

• are instructed to relieve the pressure

• stop spraying

• check or service any of the system equipment

• install or clean the spray nozzle.

1. Engage trigger lock.

2. Turn engine ON/OFF switch to OFF.

3. Move pump switch to OFF and turn pressure control knob fully clockwise.

4. Unlock trigger lock. Hold metal part of gun firmly to side of grounded metal pail and trigger gun to relieve pressure.

5. Engage the trigger lock.

6. Open all fluid drain valves in the system, having a waste container ready to catch drainage. Leave drain valve(s) open until you are ready to spray again.

If you suspect the spray tip or hose is clogged or that pressure has not been fully relieved after following the steps above, VERY SLOWLY loosen tip guard retaining nut or hose end coupling to relieve pressure gradually, then loosen completely. Clear hose or tip obstruction.

Tools Needed

•Vise

• 12-inch adjustable, open-end wrench (2)

• Hammer, 20 oz. maximum

• Small screwdriver

• Throat Seal Liquid

• Pick or long small screwdriver

Cleaning and Inspecting Parts

Never use a sharp or pointed tool to remove sleeve or other components which could result in pump rupture and cause serious bodily injury. If the sleeve cannot be removed easily, return the sleeve and cylinder to an authorized Graco distributor for removal.

• Clean and inspect all parts. Replace worn or damaged parts.

Component What to look for

Ball seats in intake valve and piston

Inside sleeve

Piston rod

nicks or wear

worn or scratched

• Remove and clean the sleeve when you are repacking the pump.

311845C 3

Repair

See your sprayer instruction manual for complete instructions for removing and installing the pump in your sprayer.

Disassembly

1. (Fig. 1) Remove packing nut (3).

ti8845a

IG. 1

2. (Fig. 2) Unscrew intake valve from cylinder.

3. (Fig. 3) Disassemble intake valve. Clean and inspect o-ring (17). You may need to use a pick to remove o-ring.

Spring (26) for model 288819 is optional and is not included with the pump.

(288467/288468)

(288819)

ti8847b

IG. 3

4. (Fig. 4) Use a hammer to tap piston rod (5) out of cylinder (2), or flip pump over and tap piston rod out against work bench.

IG. 2

ti8846a

ti8848a

IG. 4

5. (Fig. 5) Remove piston rod (5) from sleeve (4).

ti8849a

IG. 5

4 311845C

Do not clean or wipe piston valve (6) threads. Cleaning the piston valve threads could destroy the special sealing patch and cause the piston valve to come loose during operation.

6. (Fig. 6) Unscrew piston valve (6) from piston rod (5). Clean and inspect parts. The piston has a special thread locking/sealing patch. Do not remove the patch. The patch allows for disassembly/assembly

procedures before it is necessary to apply Loctite

to the threads.

7. (Fig. 7) Remove packing and glands from piston rod. Note orientation for installation.

IG. 7

ti8851a

8. (Fig. 8) Remove throat packings and glands from cylinder. Discard throat packings and glands.

Repair

IG. 6

ti8850a

ti8853a

IG. 8

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