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Repair Instructions
GMax
R
Airless Paint Sprayer
3300 psi (227bar, 22.7 MPa) Maximum Working Pressure
See page 2 for models numbers.
Important Safety Instructions
Read all warnings and instructions in this manual.
Save these instructions.
Related Manuals
Operation
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Displacement Pump
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Spray Gun
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Spray Tip
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PC Board
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Drain Valve Kit
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Clutch Replacement Kit
GRACO INC. P.O. BOX 1441 MINNEAPOLIS, MN 55440- 1441
Copyright 2001, Graco Inc. is registered to I.S. EN ISO 9001
7900
. . . . . . . . . . . . . . . . . . .
309408
309277
309639
309640
309459
308961
309890
309412F
ti1833a
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Summary of Contents for Graco 309412F
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Page 1: Repair Instructions
....GRACO INC. P.O. BOX 1441 MINNEAPOLIS, MN 55440- 1441 Copyright 2001, Graco Inc. is registered to I.S. EN ISO 9001 309408 309277 309639 309640 309459 308961 309890 309412F ti1833a... -
Page 2: Table Of Contents
Model 233718 233719 233720 233721 Warnings and Cautions ......Maintenance ........Troubleshooting . -
Page 3: Warning Symbol
Warning Symbol WARNING This symbol alerts you to the possibility of serious injury or death if you do not follow the instructions. Fire and explosion: Solvent and paint fumes can ignite or explode. To help prevent a fire and explosion: DUse only in an extremely well ventilated area. -
Page 4: Pressure Relief Procedure
WARNING INJECTION HAZARD The system pressure must be manually relieved to prevent the system from starting or spraying accidentally. Fluid under high pressure can be injected through the skin and cause serious injury. To reduce the risk of an injury from injection, splashing fluid, or moving parts, follow the Pressure Relief Procedure whenever you: D are instructed to relieve the pressure,... -
Page 5: Troubleshooting
Relieve pressure; page 4. PROBLEM CAUSE E=XX is displayed Fault condition exists Engine won’t start Engine switch is OFF Engine is out of gas Engine oil level is low Spark plug cable is disconnected or damaged Cold engine Fuel shutoff lever is OFF Oil is seeping into combustion chamber False tripping of Watch- Operating conditions out of WatchDog parameters... - Page 6 PROBLEM CAUSE Clutch is worn, damaged, or incorrectly positioned Pinion assembly is worn or damaged Strainer (89) is clogged Pump output is low. Piston ball (206) is not seating Piston packings are worn or damaged O-ring (227) in displacement pump is worn or dam- aged Intake valve ball is not seating properly Intake valve ball is packed with material...
- Page 7 PROBLEM CAUSE Engine speed is too high Clutch squeaks each time Clutch surfaces are not matched to each other clutch engages when new and may cause noise High engine speed at no Misadjusted throttle setting load load Worn engine governor Gallon counter not working Bad sensor, broken or disconnected wire No display, sprayer operates...
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Page 8: Rollers
Removal Relieve pressure; page 4. 2. Fig. 1. Remove six cap screws (56) lock washers (87), clip (35), and cover assembly (13). Fig. 1 Note: A screw driver may be needed to pry off cover assembly. 3. Remove dowel pins (108) and rollers (109) 309412 Installation 1. -
Page 9: Drive Housing
Removal Relieve pressure; page 4. 2. Fig. 2. Disconnect gallon counting sensor. Fig. 2 3. Fig. 1. Remove six cap screws (56) lock washers (87) and cover assembly (13). 4. Fig. 3. Remove two screws (59) and washers (87). 5. Remove four cap screws (56) lock washers (87) from drive housing (71). -
Page 10: Cam Follower Bearings
Removal Relieve pressure; page 4. 2. Fig. 9. Cycle pump piston rod (222) to lowest position. Turn engine off. 3. Fig. 5. Remove six cap screws (56), lock washers (87) and cover assembly (13). Note: A screw driver may be needed to pry off cover assembly. -
Page 11: Engine
Removal 1. Remove Pinion Assembly/Rotor/Field/Pinion/ Clutch, Clamp and Clutch Housing, as in- structed in manual 309890. 2. Fig. 6. Disconnect all necessary wiring. 3. Fig. 7. Remove two locknuts (7) and screws (6) from base of engine. 4. Lift engine carefully and place on work bench. NOTE: All service to the engine must be performed by an authorized HONDA dealer. -
Page 12: On/Off Switch
Removal Relieve pressure; page 4. 2. Fig. 8. Remove four screws (54) and display/cover (52). 3. Pull display connector wings (A) open on PC board and pull display connector out. 4. Disconnect ON/OFF switch connector (B) from PC board. 5. Press in on two retaining tabs on each side of ON/OFF switch (51) and remove switch. -
Page 13: Pressure Adjust Potentiometer
Removal Relieve pressure; page 4. 2. Fig.8. Remove four screws (54) and display/cover (52). Pull display connector wings (A) open on PC board and pull display connector out. 3. Remove 2 screws (139). 4. Fig. 15. Disconnect at control board (302): D Lead (D) from potentiometer. -
Page 14: Digital Display Messages
Digital Display Messages Relieve pressure before repair; page 4. No display does not mean that sprayer is not pressurized. DISPLAY SPRAYER OPERATION No Display Sprayer may be pressurized. Sprayer may be pressurized. Sprayer is pressurized. Power is ap- plied. (Pressure varies with tip size and pressure control setting.) Sprayer stops. -
Page 15: Displacement Pump
Removal See manual 309277 for pump repair instructions. 1. Flush pump. 2. Fig. 9. Cycle pump with piston rod (222) in lowest position. Relieve pressure; page 4. 4. Fig. 9. Remove suction tube (30) and hose (33). Fig. 9 Repair Installation WARNING If pin works loose, parts could break off due to... -
Page 16: Pump Pin Clip
Pump Pin Clip Removal 1. Remove pump (85). 2. Remove two bolts (107), washers (79), pump bracket (110), pail hook (90) and shield (113). 3. Fig. 10. Remove clip (71a). 309412 Installation 1. Fig. 10. Install clip (71a). 2. Install shield (113), pail hook (90) and pump brack- et (110) with two washers (79) and bolts (107). -
Page 17: Description
Ref No. 8 and 71 Ref No. 8: Pinion Housing Assembly 245400 Part No. Description 245266 PINION HOUSING, COIL 105489 241114 PINION SHAFT 112770 RETAINING RING, large 56 (Ref) Pinion housing/coil assembly (8a) includes clutch field and all bearings, pins and o-rings Ref No. -
Page 18: Sprayers
Parts Drawing - - Sprayers DETAIL A See page 20 for parts BOTTOM VIEW 309412 36, 86 *See Pinion Assembly Parts List for more information. REF 49 DETAIL A Ref 119 ti1831a 76 87 Ref 28... - Page 19 Models 233718, 233719 Ref. Part No. Description 241113 CLUTCH, ASSEMBLY includes 1a, 1b, 23, 42, 44, 88, ARMATURE, clutch ROTOR 193680 COLLAR, shaft 114530 ENGINE, gas, 5.5 HP, Honda 183350 WASHER 110837 SCREW, flange, hex 110838 NUT, lock 245400 PINION ASSEMBLY; Parts page 17 193682 PLUG, tube 191084...
- Page 20 Parts Drawing - - Sprayer Ref 70 302a 61n 61m ti1838a 309412...
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Page 21: Pressure Control Wiring Diagram
NO. PART NO. DESCRIPTION 162485 ADAPTER 198553 PANEL, control 116167 KNOB, potentiometer 116752 SWITCH, rocker, (spst) 245393 DIGITAL DISPLAY Includes 54, 57, 151, 152 198534 PLATE, control 116252 SCREW, #8 taptite, phil 198548 HOUSING, control FILTER, fluid 245396 KIT, repair, filter (includes 61a--61s) 196675 BOWL, filter... -
Page 22: Tip, Gun, Hose
Models 233720, 233721 Includes items 201 to 204 Part No. Description 233719 Hi-Boy Sprayer See parts list on page 19 233718 Lo-Boy Sprayer See parts list on page 19 240797 HOSE, grounded, nylon; 3/8 in. ID; cpld 3/8 npsm(fbe); 50 foot (15 m); spring guards both ends 3300 psi (227 bar, 27.7 MPa) 238358... -
Page 23: Dimensions
Honda GX160 Engine Power Rating @ 3700 rpm ANSI ..... . . DIN 6270B/DIN 6271 ..... . . -
Page 24: Graco Standard Warranty
Graco Standard Warranty Graco warrants all equipment manufactured by Graco and bearing its name to be free from defects in material and workmanship on the date of sale by an authorized Graco distributor to the original purchaser for use. 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.
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