Graco 3A0020A User Manual
Repair-Parts
Horizontal
3A0020A
Hydraulic Driver
For use with two horizontally mounted proportioning pumps. For professional use only.
Not for use in explosive atmospheres.
258771 - Horizontal Hydraulic Driver
1200 psi (8.2 MPa, 82.7 bar) Maximum Working Pressure
Important Safety Instructions
Read all warnings and instructions in this manual
and all supplied manuals. Save all instructions.
ENG
r_258640_3A0020A_1h
Warnings
Contents
Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Mounting Hole Layout . . . . . . . . . . . . . . . . . . . . . . . 8
Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Graco Standard Warranty . . . . . . . . . . . . . . . . . . . 10
Graco Information . . . . . . . . . . . . . . . . . . . . . . . . . 10
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.
• Do not leave the work area while equipment is energized or under pressure. Turn off all equipment
and follow the Pressure Relief Procedure when equipment is not in use.
• 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.
BURN HAZARD
Equipment surfaces and fluid that’s heated can become very hot during operation. To avoid severe
burns:
• Do not touch hot fluid or equipment.
• Wait until equipment/fluid has cooled completely.
PERSONAL PROTECTIVE EQUIPMENT
You must wear appropriate protective equipment when operating, servicing, or when in the operating
area of the equipment to help protect you from serious injury, including eye injury, inhalation of toxic
fumes, burns, and hearing loss. This equipment includes but is not limited to:
• Protective eyewear
• Clothing and respirator as recommended by the fluid and solvent manufacturer
•Gloves
• Hearing protection
2 3A0020A
Repair
Repair
Disassembly
1. Relieve pressure. See system manual for pressure
relief instructions.
NOTICE
Recommended Hydraulic Oil
Use Graco-approved Hydraulic Oil, Part No. 169236
(5 gal) or 207428 (1 gal)) or a premium, ISO grade
46 petroleum-based hydraulic oil containing rust and
oxidation inhibitors and anti-wear agents.
Before using any other type of oil in this motor, contact your Graco distributor. Unauthorized use of
lesser grade oil or substitutes may void the warranty.
Hydraulic Oil Working Temperature
The maximum hydraulic oil operating temperature is
160 °F (71 °C). The motor seals will wear faster and
leakage may occur if the pump is operated at higher
oil temperatures.
If the hydraulic oil temperature approaches 160 °F
(71 °C), check the hydraulic fluid supply cooling system, filters, etc. and clean or repair as needed.
Keep the hydraulic system clean
To reduce the risk of damaging the hydraulic driver,
verify that the hydraulic power supply fluid lines and
reservoir are clean and free from contaminants.
Carefully follow the manufacturer’s recommendations on reservoir and filter cleaning, flushing, and
periodic changes of hydraulic fluid.
Always plug the hydraulic inlets, outlets and lines
when disconnecting them to avoid introducing dirt
and other contaminants into the system.
2. Use two people to lift and clamp the cylinder (1) in a
vise.
NOTICE
To prevent damage to sealing surfaces, do not clamp
any sealing surfaces in the vise.
3. Remove elbow fittings (4) from outside of seal housings (2).
NOTICE
To prevent damage to the driver, avoid getting dust
or dirt in the driver during service.
4. Use a 3 1/4 in. socket or wrench to remove one seal
housing (2). Place a waste container below the seal
housing and cylinder (1) to drain any residual
hydraulic oil.
2a
2
4
5. Remove second seal housing (2).
6. Remove o-rings (2a) from seal housings (2).
1
2a
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2
4
Required Tools
• Vise with soft jaws
• Set of adjustable wrenches
• O-ring pick
• 3/16 in. hex key
• Rubber mallet
• 3 1/4 in. socket
• Torque wrench capable of 150 ft-lbs (203 N•m).
• Anti-seize lubricant
• Pipe sealant
3A0020A 3
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