Assembling the pump

Service

WARNING

COMPONENT RUPTURE HAZARD Do not clean or wipe the piston valve

threads. Cleaning the piston valve threads could destroy the special sealing

patch and cause the piston valve to come loose during operation, causing pump bursting and possible serious bodily injury.

Fig. 6. Unscrew piston valve from piston rod. Clean and inspect parts. The piston has a special thread locking/sealing patch. Do not remove the patch. The patch allows four disassembly/assembly procedures before it is necessary to apply Loctiter to the threads.

Fig. 8. Remove throat packings and glands from cylin- der. Discard throat packings and glands.

Not used on 248204 253056 255968

Fig. 8

7573B

Fig. 6	7576A

Fig. 7. Remove packings and glands from piston rod.

Not

used on 248204 253056 255968

Fig. 9. Soak all leather packings in SAE 30W oil for 1 hour minimum prior to assembly. Stack male gland

(204)on piston rod. Alternately stack UHMWPE (208) and leather (218) packings (note orientation) on piston rod. Install female gland (217). Install piston wiper

(216)(note orientation) and backup washer (229) on piston valve (210). The special sealing patch on piston valve threads is good for four repackings. Use Loctiter on piston valve threads after four repackings.

	Not
	used on	210
	248204	210
	248204
	253056
	255968	229
		216

			218	204	208	217
Fig. 7	ti3940b	Fig. 9	218	204	208	7574d
	ti3940b	Fig. 9

310643 5

255968, 249057, 253056, 249059, 277069 specifications

Graco is a trusted name in the realm of paint sprayers and finishing tools, offering a variety of models designed for efficiency and ease of use. The models Graco 277070, 248205, 257146, 248204, and 277069 are notable for their performance and advanced features, catering to both professional contractors and DIY enthusiasts alike.

The Graco 277070, known for its robust construction, features a powerful motor that ensures consistent spray pressure. Its lightweight design enhances maneuverability, making it ideal for large projects. The unit is equipped with a piston pump, which allows for superior pressure output and the ability to handle thicker materials without clogging.

Moving on to the Graco 248205, this model stands out with its adjustable spray pattern, allowing users to switch between horizontal and vertical settings with ease. It also incorporates a built-in filter system to keep paint free of debris, resulting in a cleaner application. Additionally, the 248205 is compatible with various types of coatings, making it a versatile choice for different projects.

The Graco 257146 takes performance a step further with its ProSpray technology, which provides an ultra-fine finish while reducing overspray. This model is designed with an ergonomic handle, enhancing user comfort during extended use. Its quick-change tip system allows for fast switching between different nozzle sizes, making it easier to adapt to various spraying tasks.

The Graco 248204 is specifically designed for smaller projects and is incredibly user-friendly. This sprayer features a simple setup process with an easy-to-understand user manual, making it perfect for beginners. Its compact size doesn’t compromise on power, delivering a suitable output for backyard projects and home improvements.

Lastly, the Graco 277069 is a well-balanced model that blends portability with performance. It offers a flexible hose for extended reach and an adjustable pressure control dial, allowing users to customize spray patterns and flow rates according to their needs. The durable construction ensures long-term reliability, even under heavy use.

All these Graco models are engineered with advanced technologies that prioritize performance and user experience. Their features collectively enhance spray accuracy, reduce cleanup time, and facilitate a smoother painting process, solidifying Graco’s reputation as a leader in the finishing equipment market.

Graco 248204, 277070, 277069, 257146, 249057, 249059, 255968, 248205, 253056 Assembling the pump