Reassembly

1.Examine inlet valve surface and reverse if damaged. (Both sides are lap surfaces.)

2.Examine piston assembly for clean inlet surface. If damaged, replace and lubricate.

NOTE: CUP INSTALLATION

Wipe cup inserter lightly with oil. Slip backup ring ontopiston. Force cup over inserter and square with all surfaces. Faulty cup installa- tion causes premature failure.

3.Next replace piston spacer and retainer.

4.Slip washer ontorod, screw onnut and torque to60 in-lb. ALWAYS USE NEW COTTERPIN.

5.Examine cylinder wallsforscoring oretching.These conditions will cause prematurewear of piston assemblies. Replace if worn or damaged.

6.Lubricate cylinder and replace O-rings and backup rings (if defective).

7 . Position cylinders in their originalorder into manifold chambers and carefully slipover rod ends onto the

pump.

8.Replace flange nuts onstuds and hand tighten both sides. Then torque each side to 125 in-lb.

9.Hand tighten locking nuts.

PUMPING SECTION CUTAWAY

SEALS AND SLEEVES

Disassembly

1. Remove discharge manifold and piston assemblies as described.

2.Remove both (ME) locking nuts from studs

3.With soft mallet, tap inlet manifold loosefromcrank- case.

4.Place inlet manifold onpair of clearance blocks with crankcase side down, and drive out seals.

5.Invert inlet manifold with CRANKCASE SIDE UP.

6.Lubricate circumference of newPrrrrrm-A-Lube seals, position in manifoldwith GARTER SPRING DOWN and drive into place.

7.Examine sleeves for scoring or other damage before' removing.

8.If worn, grasp sleeve with pliers and pull off.

NOTE:Thisprocedure willmarthesleeveso use only if sleeve is to be replaced.

9.Remove O-ring and backup rings from piston rod.

Reassembly

1 . Place barrier slinger on rod

2.Lubricate new o:rings and backup rings. Install first O-ring in the O-ring groove on the pistonrod. Position backup ring against the shoulder infront of the first O-ring, then the second O-ring. Be careful to avoid damaging the O-rings when slipping them over the piston rod threaded ends.

3.Immerse sleeve in oil, carefully twist and push onto rod. (Machined counter boreend first.)

4.Replace seal retainers.

5.Be careful when replacinginlet manifold, so the in- let seals are not damaged bythe threaded rod ends.

6.Replace locking nuts on studs.

7.Reassemble piston assemblies and discharge mani- fold as described.

Consult factory for your local distributor for crank- case servicing.

DIAGNOSIS AND MAINTENANCE

PROBLEM

PROBABLE CAUSE

SOLUTION

Low pressure

Worn nozzle.

Replace nozzle, of proper size.

 

Belt slippage.

Tighten or replace; use correct belt.

 

Inlet suction strainer clogged.

Clean. Check more frequently.

 

 

.

Worn plunger cups. Abrasives in pumped

Install proper filter.

fluid or severe cavitation. Inadequate

 

water supply.

 

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Graco Inc 800-051, 801-238, 1204E manual Diagnosis and Maintenance, Pumping Section Cutaway, Probable Cause Solution
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1204E, 801-238, 800-051 specifications

Graco Inc. is a globally recognized brand in fluid handling, offering a diverse range of products characterized by durability, efficiency, and innovative technology. Among its extensive product line, the Graco Inc. models 1204E, 801-238, and 800-051 stand out due to their unique features and robust design, making them essential tools in various industrial applications.

The Graco Inc. 1204E is an advanced air-operated double diaphragm pump known for its exceptional performance and reliability. This model is built with high-quality materials that ensure longevity even in demanding environments. One of its main features is the ability to handle a wide range of fluids, including thick and abrasive materials. The 1204E utilizes a control system that maximizes efficiency by adjusting flow rates automatically, leading to reduced operational costs and improved productivity. Furthermore, its compact design allows for easy installation in tight spaces, making it a versatile choice for numerous applications.

The 801-238 model is a high-performance grease pump specifically designed for reliable lubrication. This pump is equipped with a user-friendly interface and a powerful motor that contributes to its impressive output capabilities. Its robust construction allows it to withstand harsh conditions, ensuring that maintenance tasks can be performed with minimal downtime. A standout feature of the 801-238 is its integrated monitoring system, which provides real-time feedback on pump performance, helping operators to ensure optimal efficiency and identify potential issues before they escalate.

Lastly, the 800-051 represents Graco's commitment to precision and reliability in paint application. This model is engineered to deliver a consistent spray pattern, allowing for a flawless finish every time. The 800-051 incorporates advanced technology that minimizes overspray and waste, making it both an economical and environmentally friendly option. Additionally, its ergonomic design ensures ease of use, which is especially beneficial for long hours of operation.

In conclusion, the Graco Inc. models 1204E, 801-238, and 800-051 highlight the company's dedication to innovation and quality. Each model features technologies that enhance usability and efficiency, ensuring they meet the diverse needs of their users in industrial settings. With Graco's reputation for excellence, these products continue to set the standard in their respective fields.
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