Warning The following warnings include general safety information for this equipment. Further product specific warnings may be included in the text where applicable. FIRE AND EXPLOSION HAZARD Flammable fumes, such as solvent and paint fumes, in work area can ignite or explode. To help prevent fire and explosion: •...
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Check equipment daily. Repair or replace worn or damaged parts immediately. • Do not alter or modify equipment. • Use equipment only for its intended purpose. Call your Graco distributor for information. • Route hoses and cables away from traffic areas, sharp edges, moving parts, and hot surfaces. •...
Pressure Relief Procedure WARNING Read Injection Hazard, page 3; Burn Hazard, page 4 Lock gun trigger safety. Turn engine ON/OFF switch to OFF. Move pump switch to OFF and turn pressure control knob fully counterclockwise. Unlock trigger safety. Hold metal part of gun firmly to side of grounded metal pail, and trigger gun to relieve pressure.
At 70° F, the resistance must be between 1.2 +0.2Ω; if not, replace pinion housing. Have pressure control checked by authorized Graco dealer Adjust or replace clutch. Page 9. Repair or replace pinion assembly. Page 9. 310813 Rev C...
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Problem Pump output is low Excessive paint leakage into throat packing nut Fluid is spitting from gun Pump is difficult to prime Clutch squeaks each time clutch engages High engine speed at no load 310813 Rev C Cause Strainer (16) is clogged Piston ball (206) is not seating Piston packings are worn or damaged O-ring (227) in pump is worn or damaged Replace o-ring.
Drive Housing and Connecting Rod NOTE: The item numbers referenced are for the Hi-Boy models. The Lo-Boy models may have different item numbers. Use the Hi-Boy item number and part to find the corresponding Lo-Boy part and item number. Removal WARNING Read Injection Hazard, page 3;...
Installation Clutch Armature . 7. Lay two stacks of two dimes on smooth bench surface. Lay armature (38) on two stacks of dimes. Press center of hub down to bench surface. Clamp Removal Do Engine Removal. WARNING Gasoline can spill and cause a fire or explosion if engine is tipped on side.
Removal Remove clamp. Do Clamp Removal, page 10. . 10. Remove four screws (60) and lock washers (59) which hold clutch housing (51) to engine. Remove screw (64) from under mounting plate (D). Pull off clutch housing (51). Installation . 10. Push on clutch housing (51). Install four capscrews (60) and lock washers (59) and secure clutch housing (51) to engine.
Removal WARNING Read Injection Hazard, page 3; Burn Hazard, page 4 Relieve pressure, page 5. . 13. Remove two screws (91) and swing down cover (77). Disconnect ON/OFF switch connector (B) from PC board. Press in on two retaining tabs on each side of ON/OFF switch (71) and remove switch from cover.
Complete Sprayers - with RAC X Tip, Gun & Hose Models 248664, 248666 GMAX 3400 Airless Paint Sprayers Includes items 201 to 204 Part No. Description 248663 Hi-Boy Sprayer See parts list on page 17 248665 Lo-Boy Sprayer See parts list on page 21 240794 HOSE, grounded, nylon;...
With the exception of any special, extended, or limited warranty published by Graco, Graco will, for a period of twelve months from the date of sale, repair or replace any part of the equipment determined by Graco to be defective.