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Repair
™
GH 833 Sprayers
311283D
ENG
Korean patent: 10-0647761
- Use with Architectural Coatings, Paints, Roof Coatings
and Below Grade Coatings -
4000 psi (27.6 MPa, 275.8 bar) Maximum Working Pressure
Important Safety Instructions. Read all
warnings and instructions in this manual. Save
these instructions.
Model: 249318, 249617, 253471, 253472
Related Manuals
311279
311484
311485
311254
ti7107b
Graco Inc. P.O. Box 1441 Minneapolis, MN 55440-1441
Copyright 2006, Graco Inc. is registered to
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Warning Warning The following are general warning related to the safe setup, use, grounding, maintenance and repair of this equipment. Additional, more specific warnings may be found throughout the body of this manual where applicable. Symbols ap- pearing in the body of the manual refer to these general warnings. When these symbols appear throughout the man- ual, refer back to these pages for a description of the specific hazard. WARNING FIRE AND EXPLOSION HAZARD Flammable fumes, such as solven
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Warning WARNING EQUIPMENT MISUSE HAZARD Misuse can cause death or serious injury. � Do not operate the unit when fatigued or under the influence of drugs or alcohol. � Do not exceed the maximum working pressure or temperature rating of the lowest rated system component. See Technical Data in all equipment manuals. � Use fluids and solvents that are compatible with equipment wetted parts. See Technical Data in all equipment manuals. Read fluid and solvent manufacturer’s warnings. For complete
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Component Identification Component Identification , 2 1 8 11 3 4 9 ti7107b ti7133 10 ti7133b 6 7 5 Ref Description 1 Hydraulic pump valve 2 Pressure control 3 Lock ring 4 Drain valve 5 Engine ON/OFF switch 6 Engine controls 7 Trigger lock 8 Serial number ID label 9 Lift locations 10 Suction holder 11 Hydraulic oil fill 4 311283D
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Operation Operation Pressure Relief Procedure General Repair Information System pressure must be manually relieved to prevent � Hydraulic system and engine may become very it from starting or spraying accidentally. Fluid under hot during operation and could burn skin if high pressure can be injected into the skin and cause touched. Flammable materials spilled on hot, bare serious injury. To reduce risk of injury from injection, motor could cause fire or explosion. Have belt follow this proce
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Maintenance Maintenance Spark Plug: � Use BPR6ES (NGK) or W20EPR-U (NIPPON- DENSO) plug, only. � Gap plug to 0.028 to 0.031 in. (0.7 to 0.8 mm). For detailed engine maintenance and specifications, refer to separate Honda � Use spark plug wrench when installing and remov- Engines Owner’s Manual, supplied. ing plug. Frequency Procedure Daily Check engine oil level and fill as necessary. Daily Check hydraulic oil level and fill as necessary. Daily Check hose for wear and damage. Daily Check g
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Troubleshooting Troubleshooting PROBLEM CAUSE SOLUTION Gas engine pulls hard (won't start) Hydraulic pressure is too high Turn hydraulic pressure knob coun- terclockwise to lowest setting Gas engine does not start Switch OFF, low oil, no gasoline Consult engine manual, supplied Gas engine doesn't work properly Faulty engine Consult engine manual, supplied Gas engine operates, but displace- Pump valve is OFF Set pump valve ON ment pump doesn't operate Pressure setting too low Increase pressure Di
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Troubleshooting PROBLEM CAUSE SOLUTION The sprayer overheats Paint buildup on hydraulic compo- Clean nents Oil level is low Fill with oil. Spitting from gun Air in fluid pump or hose Check for loose connections on siphon assembly, tighten, then rep- rime pump. Loose intake suction Tighten. Fluid supply is low or empty Refill supply container. Excessive hydraulic pump noise Low hydraulic fluid level Turn sprayer OFF. Add fluid*. *Check hydraulic fluid level often. Do not allow it to become to
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Displacement Pump Replacement Displacement Pump Replacement See manual 311485 for pump repair instructions. 5. Remove clip (121). Removal 1. Flush pump (36). Stop pump on down stroke if possible. 121 2. Relieve pressure, page 5. 3. Remove suction set (147) from pump (36). ti7789 6. Slide cover up (124). 36 124 147 ti7816 7. Separate coupling (125) and remove. 4. Remove filter housing (110), page 15. 125 110 ti7814 ti7119 311283D 9
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Displacement Pump Replacement 8. Loosen jam nut (122) with a hammer. Unscrew 3. Hand tighten jam nut (122). Then tighten securely pump (36) from power head. 1/8 to 1/4 turn with hammer or torque to 330 ft-lb (447.4 N�m). 122 122 ti7782 36 9. Remove pump (36). ti7817 4. Slide cover (124) up over pump rod. With engine in OFF position, pull recoil starter to move rod until it contacts pump rod. 5. Install coupling (125) around pump rod. 125 36 ti7804 Installation ti7771 1. Screw jam nut (122)
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Displacement Pump Replacement 7. Install clip pin (121) to secure. 8. Install filter housing (110), page 15. 110 121 125 ti7809 ti7772 9. Connect suction hose (147) to pump outlet (36). 36 147 311283D 11
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Pump Power Head Replacement Pump Power Head Replacement 4. Remove power head from unit. Removal 1. Relieve pressure, page 5. 2. Remove hydraulic lines (100, 101) from head (75). 100 101 75 ti7847 Installation 1. Install power head on unit. ti7803 3. Loosen (4) mounting bolts (7) on the adapter enough to lift and remove assembly. ti7851 7 ti7841 12 311283D
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Pump Power Head Replacement 2. Tighten power head bolts (7). Torque bolts to 400 + 10 in-lb (45 + 1 N�m). ti7853 3. Attach hoses (100, 101) to head (75). Torque to 450 + 10 in-lb (50.84 N�m). 101 100 75 ti7777 4. To purge air from hydraulic lines, increase pressure enough to start hydraulic motor stroking and allow fluid to circulate for 15 seconds.Turn pressure down. Turn prime valve horizontal (closed). 311283D 13
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Hydraulic Motor Hydraulic Motor 2 1 450 in-lb (51 N.m) 2 600 in-lb (68 N.m) 3 60 in-lb (7 N.m) 4 4 930 in-lb (105 N.m) Torqued in 3 steps 3 1 ti7868 14 311283D
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Filter Housing Replacement Filter Housing Replacement Installation 1. Install filter housing (110) in pump opening. Removal 1. Relieve pressure, page 5. 2. Remove paint and drain lines from filter housing. 110 ti7772 2. Tighten fitting. ti7845 3. Attach paint and drain lines. 3. Loosen filter housing fitting (110) until housing and remove housing from pump. ti7850 ti7119 Torque to 225 + 10 in-lb. (25.4+ 1.1 N.m) 110 311283D 15
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Hydraulic Pump Replacement Hydraulic Pump Replacement Changing Hydraulic Oil 3. Remove screw (197) and pump handle cover (196). Remove four cover bolts (79) and cover (140). (It is Draining Oil not necessary to remove the hydraulic lines before a. Place drain pan under oil tank and drain plug. removing cover. The cover is designed to provide ample room for the cover to fit over the hose.) b. Unscrew reservoir (64) drain plug and drain oil from reservoir. 196 79 197 140 ti7805b 4. Unscrew
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Hydraulic Pump Replacement 5. Remove (4) belt cover screws (79), washers (78) 7. Remove belt (19), page 20. and grommets (80) (2 each side). 8. Loosen set-screws (87) on front of large pulley (4). 80 78 4 79 87 67 ti7796 6. Remove belt cover (67). ti7783 67 9. Remove pulley (4) from hydraulic pump shaft. 4 ti7807 ti7795 10. Remove nuts (10) and screws (9) holding pump to frame. 9 10 ti7788 311283D 17
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Hydraulic Pump Replacement 11. Remove hydraulic pump (3). 2. Install new pump (3) in frame. 3. Install screws (9) and nuts (10). Torque to 225 + 10 in-lb (25.42 N.m). 3 3 9 ti7800 12. Remove fittings (30, 34, 35) from pump (3) and set aside to use on the new pump. 10 34 ( ti7778 3 4. Replace large pulley (4) on hydraulic pump shaft. 35 4 ti7816 30 Installation 1. Install fittings (30, 34, 35) from old pump on new pump. Torque fitting 30 and 35 to 600 + 10 in-lb ti7813 (67.8 N.m). Torque f
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Hydraulic Pump Replacement 6. Replace set-screws (87). Tighten and torque to 60 + 9. Install suction lines. Tighten fittings. Torque fitting A 2 in-lb (6.8 + 0.2 N�m). to 225 + 10 in-lb (25.4 + 1.1 N.m). Fitting B to 450 +10 in-lb (50.1 + 1.1. N.m). Fitting C to 225 in-lb NOTE: Tighten set-screw on shaft before tightening (25.4 N.m). set-screw on pump shaft. A 7. Position belt (19) over pulleys (4, 6); Installing Belt, B page 20. 8. Replace belt cover (67) and grommets (80), wash- ers (78) a
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Hydraulic Pump Replacement Installing Belt Belt Removal and Replacement (recommended method) a. Put belt over lower pulley (6) and align correctly. Removing Belt b. Line up belt over top left side of large pulley (4). a. Place a ziptie around belt (19). 19 ziptie ti7869 ti7843 c. With the palm of your hand, hold the belt snug to large pulley while at the same time slowly pull engine recoil to rotate pulleys. Moving parts can pinch or amputate fingers and other body parts. To avoid serious i
