Service

Disconnecting the Displacement Pump

WARNING

To reduce the risk of serious injury whenever you are instructed to relieve pressure, always follow the Pressure Relief Procedure on page 9.

1.

Flush the pump if possible. Stop the pump at the

 

bottom of its stroke. Relieve the pressure.

2.

Disconnect the air and fluid hoses. Remove the

 

pump from its mounting. Note the relative position

 

of the pump’s fluid outlet to the air motor’s air inlet.

3.

See Fig. 4. (For Model 221075, refer also to the

 

Parts Drawing on page 16.) Unscrew the tie rod

 

locknuts (4) from the tie rods (12). Remove the

 

cotter pin (3). Unscrew the displacement rod (26)

 

from the air motor (14) or connecting rod (37, Mod-

 

el 221075 only). Carefully pull the displacement

Model 223586 Shown

14

pump (15) off the air motor (14). Inspect the o-ring

(7).

4. Refer to page 14 for displacement pump service.

To service the air motor, refer to the separate air

motor manual, supplied.

Reconnecting the Displacement Pump

1.

Lubricate the o-ring (7) and place it on the dis-

 

placement rod (26). Orient the pump’s fluid outlet

 

to the air motor’s air inlet as was noted in step 2

 

under Disconnecting the Displacement Pump.

 

Position the displacement pump (15) on the tie

 

rods (12). See Fig. 4.

2.

Screw the locknuts (4) onto the tie rods (12) loose-

 

ly. Screw the displacement rod (26) into the shaft

 

of the air motor (14) or the connecting rod (37,

 

Model 221075 only) until the pin holes align. Install

 

the cotter pin (3).

3.

Mount the pump and reconnect all hoses.

 

Reconnect the ground wire if it was disconnected

 

during repair. Torque the packing nut/wet-cup (36)

 

to 18–20 ft–lb (24–27 N.m). Fill the wet-cup with

 

Graco Throat Seal Liquid or compatible solvent.

4.

Tighten the tie rod locknuts (4) evenly, and torque

 

as specified in Fig. 4.

President Pumps:

1Torque to 20–30 ft–lb (27–41 N.m) Monark Pumps:

Torque to 15–20 ft–lb (20–27 N.m)

2Torque to 18–20 ft–lb (24–27 N.m)

3Lubricate

3 7

26

236

12

1

3

4

1

15

5. Start the pump and run it at about 40 psi (3 bar) air

pressure, to check that it is operating properly.

02503

Fig. 4

306981 13

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Graco 306981AD Service, Disconnecting the Displacement Pump, Reconnecting the Displacement Pump
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306981AD specifications

The Graco 306981AD is a versatile and innovative airless paint sprayer designed for professionals and DIY enthusiasts alike. This powerful tool simplifies the painting process, delivering a smooth and even finish across various surfaces. With a focus on efficiency and ease of use, the Graco 306981AD stands out in the market of painting equipment.

One of its main features is the ProXChange technology, which allows users to swap out worn or damaged pumps quickly and without needing special tools. This feature minimizes downtime, enabling more time to be spent on painting rather than equipment maintenance. Additionally, the Graco 306981AD is equipped with a high-efficiency piston pump that delivers consistent pressure, ensuring a fine spray pattern with minimal overspray.

The sprayer supports a wide range of coatings, from thin stains to thicker paints, thanks to its adjustable pressure setting. Painters can easily control the flow of paint to achieve their desired finish. The Graco 306981AD also includes an easy-to-use swivel connector, allowing users to maneuver the sprayer in tight spaces and at various angles without hassle.

In terms of design, the Graco 306981AD features a compact and portable setup. Weighing only a fraction of traditional sprayers, it includes a robust carry handle that enhances portability for on-the-go projects. The durable construction means it can withstand the rigors of demanding job sites, while the streamlined pump design promotes easy storage when not in use.

Another notable characteristic is its SmartControl technology, which provides a steady and adjustable pressure output, ensuring an optimal finish without the risk of material waste. This innovation allows for more consistent results across different applications, whether painting walls, fences, or furniture.

The Graco 306981AD is designed with user comfort in mind, featuring an ergonomic grip that reduces hand fatigue during extended tasks. Coupled with its low vibration operation, the sprayer ensures a comfortable working experience without compromising on performance.

In summary, the Graco 306981AD is a forward-thinking airless paint sprayer that combines efficiency, durability, and ease of use. Its advanced technologies like ProXChange and SmartControl, alongside its versatile functionality and user-centric design, make it a top choice for anyone looking to achieve professional results in their painting projects.
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