Pump Service, Valves, Pumping Section | Graco Inc 800-335, 308-501

PUMP SERVICE

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.

NOTE: The following metric wrenches are needed: M10, M13 and M30. Repair kits are available. Refer to the individual repair sections and the pump parts page for more details. For the best results, use all parts in the kits.

NOTE: There are two dif ferent tool kits to aid in servicing the pump. P/N 800–298 is used to ease installation of packings. P/N 800–271 includes the items in 800–298 and tools to aid in the removal of packing retainers.

Valves

NOTE: For a set of six valves, order P/N 801–472.

1.Remove the hex plug from the manifold using an M30 wrench.

2.Examine the o–ring under the hex plug and replace it if it is cut or distorted.

3.Remove the valve assembly from the cavity; the assembly may come apart.

4.Install the new valve. Install the o–ring and hex plug; torque to 75 ft–lb (103 Nm).

NOTE: Retorque the plug after 5 hours of operation.

Pumping Section

1.Remove the eight capscrews and lockwashers from the manifold using an M13 wrench.

2.Carefully separate the manifold from the crankcase.

NOTE: It may be necessary to tap the manifold lightly with a soft mallet to loosen.

CAUTION

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

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

Servicing the Plungers

NOTE: Plunger repair kit, P/N 801–474 is available to replace retainers, o–rings, washers and backup rings for three cylinders.

1.Loosen the plunger retaining screw five to six turns, using an M10 wrench. Push the plunger towards the crankcase to separate the plunger and retaining screw.

2.Remove the screw from the plunger and examine the o–ring, backup ring and copper bearing/gasket washer. Replace these parts if necessary using kit 801–474.

3.Remove the plunger and flinger from the plunger shaft. Clean, examine and replace parts as necessary.

4.Inspect the plunger shaft for oil leakage from the

crankcase. If leaking is obvious, replace the oil seals. Otherwise, DO NOT remove these seals as they cannot be reused. An oil seal kit is available to replace the seals.

5.Lightly grease the flinger and oil seal, if it is being replaced and replace them on the plunger shaft. Then install the plunger.

6.Lightly grease the retaining screw and the outer end of the plunger. Place the washer, o–ring and backup ring around the screw and install the screw through the plunger. Torque to 14.4 ft–lb (19.5 Nm).

NOTE: If you plan to replace the packings, refer to Servicing the V–Packings.

7. Lubricate the outside of each plunger . Slide the manifold onto the crankcase, being careful not to damage the seals.

8.Install the capscrews and washers finger–tight. Torque the screws to 21.7 ft–lb (29 Nm) following the tightening pattern (Figure 4). Uneven tightening may cause the manifold to bind or jam.

5	1	4	7
8	3	2	6

Figure 4

2245, 3035, 800-335, 800-065, 800-062 specifications

Graco Inc. has made significant strides in the manufacturing of fluid handling systems and equipment, positioning itself as a leader in the industry. Among their well-regarded products are the models 800-062, 308-501, 800-065, 800-335, and 3035. Each of these models comes with unique features and technologies that cater to various industrial applications.

The Graco 800-062 model is known for its reliability and efficiency in fluid transfer applications. It features a durable construction that withstands tough job site conditions. This model is equipped with advanced pneumatic technology, allowing for controlled fluid dispensing, which minimizes waste and enhances precision. Graco's attention to detail in ergonomics also enables operators to handle the device with comfort, reducing user fatigue during prolonged use.

The 308-501 model excels in its versatility, providing multiple output options to meet different operational needs. Its modular design allows for easy upgrades and maintenance. A standout characteristic of this model is its integrated filtration system, which ensures that the fluid remains contaminant-free, ultimately improving the quality of the application.

Moving on to the 800-065 model, this equipment is particularly known for its high flow rates and heavy-duty performance. Ideal for high-volume applications, it combines advanced hydraulic technology with a robust build, making it suitable for both indoor and outdoor environments. The automatic pressure regulation feature enhances its operational safety and extends the service life of the equipment.

The Graco 800-335 model stands out for its compact design, making it a perfect choice for workspaces with limited space. Despite its small footprint, it doesn't compromise on performance. The user-friendly interface allows for easy adjustments, and the model is equipped with low noise technology, making it ideal for noise-sensitive environments.

Finally, the Graco 3035 model is designed for precision and accuracy in fluid dispensing processes. It features intuitive controls and a state-of-the-art monitoring system, allowing for real-time feedback on fluid levels and pressure. An automatic shut-off feature ensures safety and prevents overfilling or accidental spills.

In summary, Graco Inc.'s models 800-062, 308-501, 800-065, 800-335, and 3035 represent a blend of innovation, durability, and user-centered design, making them vital tools in various industrial applications ranging from construction to manufacturing. These models not only enhance productivity but also ensure optimal operational safety, meeting the demands of a rapidly evolving industry.