804±544 Pump Service, Valves, Pumping Section

804±544 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 on page 5

before proceeding.

NOTE: The following metric wrenches are needed: 5 mm, 13 mm and 22 mm. 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 is a tool kit to aid in servicing the pump. P/N 800±271 includes 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 a 22 mm socket.

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 33 ft±lb (45 Nm).

NOTE: Retorque the plug after 5 hours of operation.

Pumping Section

1.Remove the eight capscrews and lockwashers from the manifold using a 5 mm 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 ce- ramic 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 nut five to six turns, using a 13 mm wrench. Push the plunger towards the crankcase to separate the plunger and retaining screw.

2.Remove the nut 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.

824±001 11

2800, 824-001, 824-007, 824-006 specifications

Graco Inc., a leader in fluid handling systems and components, is well-known for its innovative products that cater to various industries. Among its diverse range, the 824-006, 824-007, 824-001, and 2800 models stand out for their outstanding performance and reliability.

The Graco 824-006 and 824-007 are air-operated diaphragm pumps designed for transferring a variety of fluids, including corrosive materials and adhesives. These models feature a unique design that allows for superior suction lift capabilities, enabling them to handle thick or viscous materials effectively. The air-operated aspect of these pumps ensures that they deliver consistent performance without requiring electricity, making them ideal for use in remote locations or hazardous environments. Additionally, the 824-006 and 824-007 boast durable materials that resist wear and tear, ensuring longevity and reducing maintenance needs.

The Graco 824-001 is another exceptional model designed for those who require a reliable pump for less demanding applications. This model features a compact design that simplifies portability and installation. The 824-001 is engineered for efficiency and ease of use, with straightforward controls that allow operators to quickly adjust flow rates according to their specific requirements. Its robust design ensures that it can withstand the rigors of daily use, making it a practical choice for many industries.

The Graco 2800 is known for its versatility and robust performance across various applications. This model is equipped with advanced technology that enhances its operational efficiency, including adjustable pressure settings and automated controls for a seamless user experience. The 2800 is particularly effective for high-volume applications, with the ability to handle larger quantities of fluid without sacrificing accuracy or performance. Its ergonomic design also contributes to operator comfort, reducing fatigue during extended use.

All these Graco models emphasize reliability, efficiency, and ease of maintenance, which are crucial for businesses that rely on fluid handling systems. Graco’s commitment to quality is evident in every product they offer, ensuring that customers can depend on their equipment to perform consistently. With features designed to optimize performance and user experience, the 824-006, 824-007, 824-001, and 2800 models reflect the company’s dedication to innovation in the fluid handling industry. Whether for industrial, commercial, or specialized applications, Graco’s pumps are engineered to meet diverse needs with excellence and reliability.

Graco Inc 2800, 824-007 804±544 Pump Service, Valves, Pumping Section, Servicing the Plungers

Models: 2800 824-001 824-007 824-006