Graco GMx 7900 Instructions-Repair/Parts
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Graco GMx 7900 Instructions-Repair/Parts

Graco GMx 7900 Instructions-Repair/Parts

Airless paint sprayer
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INSTRUCTIONS-REPAIR
KEEP FOR REFERENCE.
Read this and all related manuals for
important warnings and instructions.
INSTRUCTIONS
GMxr 7900
Airless Paint Sprayer
3300 psi (227 bar, 22.7 MPa ) Maximum Working Pressure
GMx 7900
Model
Series
824630
B
Hi-Boy with tool box and Lo-Boy
suction/drain line kit
PATENTS PENDING
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Spray Tip
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PC Board
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Drain Valve Kit
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Tool Box Kit
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Warnings and Cautions
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Repair
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The SHERWIN-WILLIAMS COMPANY, CLEVELAND, OHIO 44115
Description
308867
308798
307614
308644
308919
308961
308817

Table of Contents

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10
ECOPYRIGHT 1999, GRACO INC.
2
3
Parts
4
5
Sprayer
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7
Pressure Control
7
Lo-Boy Suction Set Kit
8
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9
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Sherwin-Williams Warranty
11
11
824128
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Rev. E
9035A
13
15
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24

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Summary of Contents for Graco GMx 7900

  • Page 1: Table Of Contents

    ........The SHERWIN–WILLIAMS COMPANY, CLEVELAND, OHIO 44115 ECOPYRIGHT 1999, GRACO INC.
  • Page 2 Warnings and Cautions Warning Symbol Caution Symbol WARNING CAUTION This symbol alerts you to the possibility of serious This symbol alerts you to the possibility of damage to injury or death if you do not follow the instructions. or destruction of equipment if you do not follow the instructions.

  • Page 3: Component Identification And Function

    Component Identification and Function Model 824630 9034A Fig. 1 Pressure Control Switch ON/OFF, enables/disables clutch function and pressure control Pressure Adjusting Knob Controls fluid outlet pressure Air Cleaner* Filters air entering the carburetor Fuel Tank* Uses 86 octane unleaded gasoline Muffler* Reduces noise of internal combustion Spark Plug Cable*...

  • Page 4: Maintenance

    Maintenance CAUTION WARNING For detailed engine maintenance and specifications, INJECTION HAZARD refer to separate Honda Engines Owner’s Manual, The system pressure must be manually supplied. relieved to prevent the system from starting or spraying accidentally. Fluid DAILY: Check engine oil level and fill as necessary. under high pressure can be injected through the skin and cause serious injury.

  • Page 5: Troubleshooting

    F, the resistance must be between 1.7 0.2Ω; if not, replace clutch coil 241121. Have pressure control checked by authorized Graco dealer. Clutch is worn or damaged Replace clutch. Page 9. Pinion assembly is worn or damaged Repair or replace pinion assembly. Page 9.
  • Page 6 PROBLEM CAUSE SOLUTION Pump output is low Strainer (31) is clogged Clean strainer Piston ball (25) is not seating Service piston ball. Manual 308798. Piston packings are worn or damaged Replace packings. Manual 308798. O-ring (227) in displacement pump is worn or Replace o-ring.

  • Page 7: Rollers

    (82) and (83) and to areas called out by note 1. Use full 0.68 pint (0.32 liter) of grease for 2. Fig. 2. Remove six cap screws (10) lock washers GMx 7900. (9) and cover assembly (24). 3. Fig. 3. Remove two screws (99) and washers (9).

  • Page 8: Cam Follower Bearings

    Cam Follower Bearings Removal Installation 1. Install two cam follower bearings (20c). Relieve pressure; page 4. 2. Fig. 16. Cycle pump piston rod (222) to lowest 2. Install cam follower plate (20b). position. Turn engine off. 3. Fig. 4. Remove six cap screws (10), lock washers (9) and cover assembly (24).

  • Page 9: Pinion Assembly/Rotor/Field/Shaft/Clutch

    Pinion Assembly/Rotor/Field/Shaft/Clutch Removal If pinion assembly (19) is not removed from clutch 6. Fig. 8. Remove retaining ring (19e). housing (5), do 1. through 4. Otherwise, start at 5. 7. Tap pinion shaft (19d) out with plastic mallet. Relieve pressure; page 4. 2.

  • Page 10: Clamp

    Pinion Assembly/Rotor/Field/Shaft/Clutch Installation 1. Fig. 10. Lay two stacks of two dimes on smooth 6. Fig. 8. Tap pinion shaft (19d) in with plastic mallet. bench surface. 7. Install retaining ring (19e) with beveled side facing 2. Lay armature (4a) on two stacks of dimes. field (Y).

  • Page 11: Clutch Housing

    Clutch Housing Removal 1. Fig. 12. Remove four capscrews (75) and lock- washers (77) which hold clutch housing (5) to engine. 2. Remove screw (15) from under mounting plate (D). 3. Remove engine key (7). 4. Pull off clutch housing (5). Installation 1.
  • Page 12 On/Off Switch Removal Installation 1. Install new ON/OFF switch (309) so tabs of switch snap into place on inside of pressure control Relieve pressure; page 4. housing. 2. Fig. 15. Remove five screws (307) and 2. Connect two wires (A) to ON/OFF switch. cover (322).

  • Page 13: Pressure Control

    Pressure Control Control Board Removal Installation When installing replacement control board, follow instructions with control board to set model type. Relieve pressure; page 4. 2. Fig. 15. Remove five screws (307) and 1. Fig. 15. Install green ground wire and control cover (322).
  • Page 14 Pressure Control Control Board Diagnostics 1. Fig. 15. Remove five screws (307) and 3. Turn ON/OFF switch ON. cover (322). 4. Observe LED operation and reference following 2. Start sprayer. table: SPRAYER OPERATION INDICATES WHAT TO DO BLINKS Two times Sprayer shuts down and LED contin- Run away pressure.
  • Page 15 Fig. 20 1. Fig. 19. Pull piston rod out 1.0 in. Screw in pump until holes in housing plates and piston rod align. Fig. 21. Fill packing nut with Graco TSL until fluid flows onto the top of seal. 1.0 in.

  • Page 16: Displacement Pump

    Displacement Pump Pump Pin Clip Removal Installation 1. Fig. 17. Install clip (230). 1. Remove pump (28). 2. Install shield (95), pail hook (94) and pump bracket 2. Remove two bolts (86), washers (25), pump brack- (85) with two washers (25) and bolts (86). Torque et (85), pail hook (94) and shield (95).
  • Page 17 Parts List & Drawing – Pinion Assembly Ref No. 19 and 20 Ref No. 19: Pinion Housing Assembly 241116 Ref No. 20: Drive Housing Assembly 241537 Part No. Description Part No. Description 241121 PINION HOUSING, COIL DRIVE HOUSING 105489 194060 RETAINING CLIP, pump pin 241114 PINION SHAFT...
  • Page 18 Parts Drawing – Sprayer Model 824630 DETAIL A Ref 11 Label See page 17 for the parts. See manual 308798 for the parts. See page 20 for the parts. See manual 308817 for the parts. Flat side up 8699A 9027A Bottom View Ref 35 DETAIL A...

  • Page 19: Pinion Assembly

    Parts List – Sprayer Model 824630 Part No. Description Part No. Description 114530 ENGINE 191084 SLEEVE 113084 RIVET, blind 179811 WHEEL, semi–pneumatic 192014 PLATE, indicator 101242 RING, retaining 241113 CLUTCH ASSEMBLY, 104811 HUBCAP includes 4a, 4b, 16, 17, 72, 80 154636 WASHER .ARMATURE, clutch, 5 in.
  • Page 20 Parts Drawing – Sprayer Model 824630 318f 318e 318d 318b 318c 318z 318aa 318a 318g 318h 318m 318n 318l 318j 318k 8716A 824128...
  • Page 21 Parts List – Sprayer Model 824630 NO. PART NO. DESCRIPTION NO. PART NO. DESCRIPTION 193653 PLATE, control 318f 192706 BOWL, filter 241093 BOARD, PC 318g 193710 SEAL, valve 111839 SCREW, mch pan, 6–32 x 1/2 in. 318h 193709 SEAT, valve 240776 HARNESS, wiring.
  • Page 22 Parts – Lo-Boy Suction Set Kit Model 241289 Ref. Part No. Description Qty. 106d 241270 TUBE, suction, 5 gallon (20 liter) 106a 106a 194306 .HOSE, fluid 106b 176450 .GUARD, hose 106c 241542 .SWIVEL, tube, inlet includes 106ca, 106cb, and 106cc 106ca 103413 ..O-RING 106e...

  • Page 23: Dimensions

    If you have painters who do not read En- glish, order one of the following labels to apply to your sprayer. The drawing shows the best place- ment of these labels for good visibility. Order the labels from your Graco distributor. French 194931 Apply other...

  • Page 24: Phone Number

    Graco’s written recommendations. This warranty does not cover, and Graco shall not be liable for general wear and tear, or any malfunction, damage or wear caused by faulty installation, misapplication, abrasion, corrosion, inadequate or improper maintenance, negligence, accident, tampering, or sub- stitution of non–Graco component parts.

This manual is also suitable for:

824630

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