Summary of Contents for Graco Sherwin-Williams ULTIMATE Mx 795
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Model 824–140, Series A Upright basic sprayer only Related Manuals 7724A Displacement Pump ....308–798 The SHERWIN–WILLIAMS COMPANY, CLEVELAND, OHIO 44115 COPYRIGHT 1997, GRACO INC.
Read all instruction manuals, tags, and labels before operating the equipment. Use the equipment only for its intended purpose. If you are not sure, call your Graco distributor. Do not alter or modify this equipment. Use only genuine Graco parts.
WARNING INJECTION HAZARD Spray from the gun, leaks or ruptured components can inject fluid into your body and cause extremely serious injury, including the need for amputation. Fluid splashed in the eyes or on the skin can also cause serious injury. Fluid injected into the skin is a serious injury.
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WARNING FIRE AND EXPLOSION HAZARD Improper grounding, poor ventilation, open flames or sparks can cause a hazardous condition and result in a fire or explosion and serious injury. If there is any static sparking or you feel an electric shock while using this equipment, stop spray- ing immediately.
Component Identification and Function Fig. 1 7724A Motor DC motor, permanent magnet, totally enclosed, fan cooled Drive Assembly Transfers power from DC motor to the displacement pump Pail Hanger Container for fluid to be sprayed may be hung here Displacement Pump Transfers fluid to be sprayed from source through spray gun Primary Fluid Outlet Single spray gun operation is connected here...
See Fig. 1. fluid outlet. NOTE: See Fig. 1, except where noted. WARNING 1. Fill packing nut full with Graco Throat Seal Liquid (TSL), supplied. Fig. 2. FIRE AND EXPLOSION HAZARD Proper electrical grounding is essential to reduce the risk of fire or explosion which can result in serious injury and property damage.
Setup Grounding Grounded Outlets WARNING Improper installation or alteration of the grounding Grounding Prong plug will result in a risk of electric shock, fire or Fig. 3 explosion that could cause serious injury or death. 2. Do not alter ground prong or use adapter. 3.
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Startup 10. Adjust spray pattern. RAC IV RETAINING HANDLE GUN SAFETY LATCH ENGAGED a. Increase pressure just until spray from gun is completely atomized. Use lowest pressure necessary to get desired results. This reduces overspray and fogging, decreases tip wear and extends the life of the sprayer.
Shutdown and Care 6. Coil hose and hang it on hose rack when storing it, WARNING even for overnight, to help protect hose from kink- ing, abrasion, coupling damage, etc. INJECTION HAZARD To reduce the risk of serious injury, whenever you are instructed to relieve pressure, follow the Pressure Relief Procedure on page 7.
Flushing When to flush CAUTION Determine material to spray from column 1. Flush with material in column 2. Then follow recommendations in Do not leave water or water-based fluids in sprayer if one of next three columns. it could freeze. Push water out with mineral spirits. Frozen fluid in sprayer prevents starting and may cause serious damage.
Troubleshooting WARNING INJECTION HAZARD To reduce the risk of serious injury, whenever you are instructed to relieve pressure, follow the Pres- sure Relief Procedure on page 7. MOTOR WON’T OPERATE TYPE OF PROBLEM WHAT TO CHECK WHAT TO DO If check is OK, go to next check When check is not OK refer to this column Basic Fluid Pressure Problems 1.
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Troubleshooting MOTOR WON’T OPERATE (Continued) TYPE OF PROBLEM WHAT TO CHECK WHAT TO DO If check is OK, go to next check When check is not OK refer to this column Basic Electrical Problems 1 . Check leads from motor to be sure they are 1.
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Troubleshooting LOW OUTPUT TYPE OF PROBLEM WHAT TO CHECK WHAT TO DO If check is OK, go to next check When check is not OK refer to this column 1. Follow Pressure Relief Procedure Warn- Low Output 1. Check for worn spray tip. ing, then replace tip.
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Troubleshooting NO OUTPUT TYPE OF PROBLEM WHAT TO CHECK WHAT TO DO If check is OK, go to next check When check is not OK refer to this column Motor runs and pump strokes 1. Check paint supply. 1. Refill and reprime pump. 2.
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Troubleshooting MOTOR IS HOT AND RUNS INTERMITTENTLY TYPE OF PROBLEM WHAT TO CHECK WHAT TO DO If check is OK, go to next check When check is not OK refer to this column Motor is hot and runs intermit- 1. Determine if sprayer was operated at high 1.
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General Repair Information WARNING CAUTION To reduce the risk of a pressure control malfunction: ELECTRIC SHOCK HAZARD To reduce the risk of serious injury, Always use needle nose pliers to disconnect a including electric shock, DO NOT touch wire. Never pull on the wire, pull on the connector. any moving parts or electrical parts with Mate wire connectors properly.
Spin Test Armature, Brushes, and Motor Wiring Open WARNING Circuit Test (Continuity) 1. Relieve pressure. Connect red and black motor ELECTRIC SHOCK HAZARD leads together with a test lead. Turn motor fan by Do not touch brushes, leads, springs or hand at about two revolutions per second.
Motor Brush Replacement NOTE: Replace brushes worn to less than 1/2 in. Note 5. Inspect commutator for excessive pitting, burning that brushes wear differently on each side of mo- or gouging. A black color on commutator is normal. tor, so check both. Brush Repair Kit 220–853 is Have commutator resurfaced by a qualified motor available.
Motor Brush Replacement 11. Test brushes. CAUTION a. Remove pump connecting rod pin. Do not run the sprayer dry for more than 30 seconds b. With sprayer OFF, turn pressure control knob while checking the brushes to avoid damaging the fully counterclockwise to minimum pressure.
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Power Supply Cord and On/Off Switch Replacement 79 G 107 E Fig. 15...
Pressure Control Repair Motor Control Board Installation WARNING 1. Relieve pressure. INJECTION HAZARD To reduce the risk of serious injury, whenever you are instructed to relieve 2. Fig. 16. Install motor control board (104) with four pressure, follow the Pressure Relief screws (102) and washers (103).
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Pressure Control Repair Pressure Control Transducer Removal Pressure Adjust Potentiometer Removal 1. Relieve pressure. 1. Relieve pressure. 2. Fig. 16. Remove five screws (28) and cover (82). 2. Fig. 16. Remove five screws (28) and cover (82). 3. Disconnect lead (E) from motor control board (104).
Bearing Housing and Connecting Rod Replacement WARNING CAUTION DO NOT use the bearing housing screws (25) to try INJECTION HAZARD to align or seat the bearing housing; the bearing and To reduce the risk of serious injury, drive housing will not align properly and will result in whenever you are instructed to relieve premature bearing wear.
Drive Housing Replacement 4. Lightly tap lower rear of bearing housing (22) with WARNING a plastic mallet to loosen it from drive housing (67). Pull assembled bearing housing and connecting INJECTION HAZARD rod straight off drive housing. To reduce the risk of serious injury, whenever you are instructed to relieve 5.
Motor Replacement WARNING CAUTION DO NOT drop gear cluster (51) when removing drive INJECTION HAZARD housing (67). The gear cluster may stay engaged in To reduce the risk of serious injury, the motor front end bell or the drive housing. whenever you are instructed to relieve pressure, follow the Pressure Relief DO NOT lose thrust balls (90) located at each end of...
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Motor Replacement Torque to 90–100 in-lb (10.2–11.3 N.m) Liberally apply grease Fig. 19...
Displacement Pump Repair Removing pump 1. Flush pump. Relieve pressure. Fig. 20. Cycle 4. Fig. 22. Push out pin. pump with piston rod (222) in its lowest position. 2. Fig. 20. Unscrew suction tube and hose from pump. Fig. 22 7720A 5.
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7722A Fig. 24 2. Fig. 25. Push pin (21) into holes. 7723A Fig. 27 Fig. 28. Fill packing nut with Graco TSL, through one of the slits, until fluid flows onto the top of seal. 7720A Fig. 25 7710A Fig. 28...
Parts Drawing – Sprayer Ultimate Mx 795 Sprayers Model 824–140, Series A Includes items 1 – 126 Basic Sprayer 73a* Ref 85 Ref 70 Ref 120 SEE PARTS ON PAGE 34 Ref 85 7725A...
Parts List – Sprayer Ultimate Mx 795 Sprayers Model 824–140 Series A Includes items 1 – 126 Basic Sprayer NO. PART NO. DESCRIPTION NO. PART NO. DESCRIPTION 110–996 NUT, 5/16–18 unc–2a 192–719 HANGER, pail 101–242 RING, retaining 192–027 SLEEVE 218–034 CONNECTING ROD 100–644 SCREW, socket head, 1/4–20 x 0.75”...
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.