Graco Inc Serles A, 800-903, 800-902 Pump Service, Servicing the Plungers, Valves, Pumping Section

Page 10

PUMP SERVICE

 

To reduce the

 

 

 

Servicing the Plungers

P/N803-677is availableto

 

risk of

serious bodily

injury,

NOTE Plunger repair kit,

 

including fluid injection, splashingthe eyes or replace retainers,

 

O-rings. washers

and

 

on the skin, or injury from moving parts, always backup rings for three cylinders.

 

 

 

 

 

 

 

 

-

 

 

 

 

 

 

 

 

follow the Pressure ReliefProcedureWarnlng

 

 

 

 

 

 

 

 

before proceeding.

 

 

1 .

Loosen the plunger retaining screwtofivesix tums,

NOTE

The following metricwrenches are needed:

 

usinganMlOwrench.Push theplungertowards the

 

crankcase to separate the plunger and retaining

 

 

M10, M13 and M30. Repairkits are available.

 

screw.

 

 

 

 

 

 

 

Referto the individual repair sectionsandthe

2.

Remove the screw fromihe plunger and examine

 

 

 

pagefor more details. For thebest

 

 

pump parts

 

 

 

the O-ring, backup ring and copper bearing/gasket

 

 

results, useall parts in the kits.

 

 

 

 

 

 

washer. Replace these parts,ifnecessary, usingkit

NOTE: There are

Wo different tool kits to aid in

 

801-474.

 

 

 

 

 

 

servicing the pump. P/N800-298is used to

3. Remove the plunger and flinger from the plunger

 

 

ease installation of packings. P/N 800-271

 

shaft. Clean, examine

and replace parts as

 

 

includes

the itemsin800-298andtoolsto aid

 

necessary.

 

 

 

 

 

 

in the removalof packing retainers.

4. Inspect the plunger shaft foroil leakage from the

Valves

 

 

 

 

 

 

 

 

 

crankcase. If leaking is

obvious, replace

theoil

NOTE: For a set of six valves, order P/N803-664or

 

seals. Otherwise,DO NOT remove these sealsas

 

they cannotbe reused.An oil

seal

kitis availableto

1.

 

803-666.

 

 

 

replace

the seals.

 

 

 

 

Remove the hex plug

fromthe manifoldusing an

5.

Lightly

grease theoil seal, if

it is

being replaced,

2.

M30 wrench.

 

 

 

 

and the flinger and replace them on the plunger

Examine the O-ring under the hexplug and replace

 

shaft. Theninstall the plunger.

 

 

 

it if it is cut or distorted.

 

6. Lightly grease the retaining screw and the outer end

3. Remove the valve assembly from the cavity; the

 

oiihephger. Place the wisher,O-ring and backup

 

ring around the screw and install the screw through

 

assembly may come apart.

 

 

the plunger. Torqueto 14.4ft-lb(19.5 Nm).

 

4.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NOTE: Retorque the plug after 5 hours of

operation.

7. Lubricate. the outside of each plunger. Slide the

Pumping Section

 

 

 

manifold onto the crankcase, being careful tonot

 

 

 

damage the seals.

 

 

 

 

1. Remove the eight capscrews and lockwashers from

 

 

 

 

 

8. Install the capscrews and washers finger-tight.

 

the manifold using anM13 wrench.

 

 

Carefully separate the manifold from the crankcase.

Torquethescrewsto21.7ft-lb(29Nm)followingthe

2.

tightening pattern (Figure4). Uneven tightening

NOTE:

It maybenecessaryto tap themanifold lightly

 

may cause the manifoldto bind or jam.

 

 

 

 

 

 

 

 

 

 

with asoft mallet to loosen.

 

 

 

 

 

 

 

 

 

 

 

CAUTION

 

 

 

 

 

 

I

 

Keep the manifold properly aligned with the ceramic plungers when removing to avoid damage to the plungeror seals.

3.Carefully examine each plunger for any scoring or cracking and replace as necessary.

Figure 4

10308-533

Image 10
Contents ~~Pressure Washer 1100psi 75 bar Maximum Working PressureFluid Injection Hazard Grounding Instructions Ground Fault Circuit Interrupter ProtectionEquipment Misusehazard Terms Hose SafetyMoving Parts Hazard Handleandroute HOS€S Wffully DOnot pullConnect to Water Supply Startup 308-533Trigger Safety Latch Installing and Changing Spray TipsMaintenance SHUTDOWN, Flushing and StorageTroubleshooting Chart Belt slippage Tank Tighten or replaceValves Pump ServiceServicing the Plungers Pumping SectionServicing the V-Psckings Hydra-Clean@710Pressure Washer Parts Drawing803-560 Parts List803-579 Hydra-Clean@720Pressure Washer Hydra-Cleans 720 PressureWasher 800-904Pump Assembly, 10 GPM 803-643 803-635803-578Pump Assembly, 20 GPM Parts List Technical Data Accessories800-042

1010, 1020, 710, 308-533, 720 specifications

Graco Inc. is a leading manufacturer known for its innovative solutions in the fields of fluid handling and spray equipment. Among its diverse product range, the models 800-905, 800-902, 800-904, 308-533, and 710 stand out for their unique features, advanced technologies, and notable characteristics, catering to a broad spectrum of industrial and commercial applications.

The Graco 800-905 is recognized for its robust construction and reliability. This high-performance unit is designed for heavy-duty applications, providing efficient fluid transfer and precise material delivery. Key features include a durable pressure pump, allowing for extended service life and reduced maintenance. The ergonomic design ensures ease of use, while the built-in safety mechanisms enhance operator protection during operation.

In the case of the Graco 800-902, this model emphasizes versatility and adaptability. It can handle a wide range of fluids, making it suitable for various industries, from automotive to manufacturing. The 800-902 features adjustable pressure settings, offering users the flexibility to switch between different tasks without compromising performance. Its compact design allows for easy transportation and setup, making it ideal for both stationary and mobile applications.

The Graco 800-904 takes efficiency to new heights with its innovative pump technology. It provides a consistent and smooth flow of materials, reducing waste and promoting a cleaner working environment. The model also incorporates an advanced filtration system, ensuring that impurities do not compromise fluid quality. This feature is particularly important in sectors where precision and quality are paramount, such as in the coatings and adhesives industry.

The Graco 308-533 focuses on enhancing user experience through intuitive controls and streamlined workflows. This unit is engineered for rapid deployment, allowing operators to quickly engage in their tasks. Additionally, its energy-efficient design not only reduces operational costs but also minimizes environmental impact, aligning with modern sustainability goals.

Finally, the Graco 710 showcases the brand’s commitment to technological advancement. This model features cutting-edge electronic controls that provide real-time monitoring of performance data, facilitating proactive maintenance and operational adjustments. Its user-friendly interface allows for easy navigation of settings and configurations, making it an ideal choice for professionals seeking precision and control.

In summary, Graco Inc.’s models 800-905, 800-902, 800-904, 308-533, and 710 exemplify the company’s dedication to quality, innovation, and efficiency. Each model provides unique features tailored to meet the diverse needs of various industries, reinforcing Graco's reputation as a trusted leader in fluid handling solutions.