DamaaeI Citself.A U T O N | Graco Inc 1007, 307-308, 226-813

Unloader

Remove the locknut (67). adjusting nut (68)and spring washers (71).

Remove bolts (511 andseparatetheupper andlower casings (48 and 49). All other parts can then be freely removed.

To replace the cup and back-up ring (46 and 47):

a. Cut throughtheoldcup and back-upringand remove them from the valve stem.

b.Grip the shaft sleeve (69) in a vise equipped with jaw protectors.

c.Slowly heat the end of the valve stem andpiston 165) with a propanetorch. Whenthe assembly ishot enough, (about 250" F [120" C]) thepistoncanbe easily screwed off the valve stem by firmly gripping with a pair of pliers.

d.After the assembly cools, mount a new back-up ring and cup on the piston.

e.Beforereplacing the piston, put a few dropsof locking compound on the valve stem threads.

Items 69 and 70 are supplied as a unit and should notbe disassembled.

Assemble in reverse order withthefollowing pre- cautions:

a. Be certain the by-passvalve seat (58)is installedwith the flat side of the valve against the valve ball (60). b. The first spring washer (71) is installed concave side downward and the remaining springs are alternated

as shown. See Fig 4.

Never shim or alter the 17 spring washers 171) as thiswill cause theunitto overpressurize and

' damaaeI Citself.A U T ' O N 1

~~~

To readjust the pressure of the unloader valve:

a. Replace the 1/4 in. pipeplug (102) in theoutlet manifold (101)with a 1500 psi (103bar) min. pressure gauge.

b.Screw the adjusting nut (68) into the stem (69) until approximately 118 in. of thread is exposed.

c.Start the unit according tooperation instructions on page 2.

d. The unit should"unload" at 1050 to 1150 psi (72- 79 bar)water pressure.Close the sprayvalveand note pressure. Continueadjusting the nut,closing the spray valve, and checking pressure until required pressure is obtained. Tighten the locknut.Check the unloading pressure a couple more timesby triggering the gun and noting pressure.

e. Shut off the unit, trigger gunto,relieve pressure, remove the gauge and replace the pipe plug.

NOTE: Increasing valve unloaderpressurebeyond

specifiedsetting willnot increase tlp pressure or flow rate.

	"Repair Kit Parts	52
	"Repair Kit Parts	51
		51

. ...

. .

307-308 7

1007, 226-813, 307-308 specifications

Graco Inc is a prominent player in the fluid management industry, known for its innovative solutions that span various sectors, including industrial, commercial, and residential markets. Among its extensive lineup, the Graco Inc 1007,307-308,226-813 models stand out due to their specialized features and advanced technologies, catering to the needs of professionals seeking efficiency and reliability.

The Graco Inc 1007 model is designed for maximum performance, primarily aimed at handling high-pressure applications. This model excels in delivering precision and control, making it ideal for paint sprayers and other fluid dispensing tools. Its robust construction ensures durability, allowing it to withstand the rigors of daily use, while its compact design improves maneuverability in tight spaces.

The 307-308 models come equipped with cutting-edge technologies that enhance user experience and operational efficiency. These models leverage advanced pump technologies, ensuring consistent flow and pressure, which is critical for tasks requiring meticulous accuracy. Additionally, the inclusion of automated features reduces the manual workload, allowing users to focus on other essential tasks.

One of the notable characteristics of the Graco 226-813 is its versatility. This model can handle a variety of fluids, from thick coatings to thin varnishes, making it a favorite among contractors and DIY enthusiasts alike. Its easy-to-use interface allows for quick adjustments to accommodate different materials without compromising quality. Moreover, the Graco 226-813 incorporates an efficient filtration system that minimizes clogs, ensuring a smooth and uninterrupted flow during operations.

All Graco Inc models emphasize safety and ergonomics. The incorporation of safety features protects users during operation, while ergonomic designs reduce fatigue during extended use. This balance of safety and comfort ensures that professionals can rely on Graco products for prolonged periods without adverse effects.

Furthermore, Graco Inc's commitment to sustainability is reflected in its technology, which promotes efficient resource usage, minimizing waste and environmental impact. The company continues to innovate, pushing the boundaries of fluid management technology to meet the evolving demands of various industries.

In conclusion, Graco Inc 1007, 307-308, and 226-813 models exemplify the company's dedication to quality and innovation. Their main features, advanced technologies, and user-centric characteristics make them invaluable tools for professionals navigating the demands of fluid management in today's fast-paced environments.