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Graco GH 16U277 Repair Manual

Big rig sprayers
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Repair
™
GH
Series Big Rig Sprayers
- Use with Architectural Coatings, Paints, Roof Coatings and Below Grade Coatings -
Model
Description
16U277
GH1017es Bare
16U278
GH2570es Bare
16U279
GH733es Bare
16U280
GH5040es Bare
16U285
GH933es Bare
16U281
GH933 Bare
Important Safety Instructions
Read all warnings and instructions in this
manual. Save these instructions.
Related Manuals:
311254
312145
332156
332158
308043
311825
311762
Maximum Working Pressure
1000 psi (6.9 MPa, 69 bar)
2500 psi (17.2 MPa, 172 bar)
4000 psi (27.6 MPa, 276 bar)
5000 psi (34.5 MPa, 345 bar)
7250 psi (50.0 MPa, 500 bar)
7250 psi (50.0 MPa, 500 bar)
332157A
EN
ti20726a

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Summary of Contents for Graco GH 16U277

  • Page 1 Repair 332157A ™ Series Big Rig Sprayers - Use with Architectural Coatings, Paints, Roof Coatings and Below Grade Coatings - Model Description Maximum Working Pressure 16U277 GH1017es Bare 1000 psi (6.9 MPa, 69 bar) 16U278 GH2570es Bare 2500 psi (17.2 MPa, 172 bar) 16U279 GH733es Bare 4000 psi (27.6 MPa, 276 bar)

  • Page 2: Table Of Contents

    Hydraulic Pump Replacement ....18 Graco Standard Warranty ....36 Changing Hydraulic Oil .

  • Page 3: Warnings

    Check hoses and parts for signs of damage. Replace any damaged hoses or parts. • This system is capable of producing 7250 psi (50.0 MPa, 500 bar). Use Graco replacement parts or accessories that are rated a minimum of 7250 psi (50.0 MPa, 500 bar).
  • Page 4 Warnings WARNING WARNING WARNING WARNING MOVING PARTS HAZARD Moving parts can pinch, cut or amputate fingers and other body parts. • Keep clear of moving parts. • Do not operate equipment with protective guards or covers removed. • Pressurized equipment can start without warning. Before checking, moving, or servicing equipment, follow the Pressure Relief Procedure and disconnect all power sources.

  • Page 5: Component Identification

    Component Identification Component Identification START ti20727a Engine Controls Engine ON/OFF Switch (Electric-Start Units) Engine ON/OFF Switch (Pull-Start Units) Lift Location Suction Tube Holder Pressure Control Lock Ring Serial Number ID Label Hydraulic Pump Valve 10 Hydraulic Oil Fill 11 Pressure Bleed Valve, T handle 12 Trigger Lock 332157A...

  • Page 6: Pressure Relief Procedure

    Pressure Relief Procedure Pressure Relief Procedure General Repair Information Follow the Pressure Relief Procedure whenever you see this symbol. Hydraulic system and engine may become very hot during operation and could burn skin if touched. Flammable materials spilled on hot, bare motor could cause fire or explosion.

  • Page 7: Maintenance

    Semi-annually Check belt wear; replace if necessary. Yearly or 2000 Replace hydraulic oil and filter element with Graco ISO 46 Hydraulic Oil 169236; hours 5 gallon/20 liter or 207428; 1 gallon/3.8 liter) and filter element 287871. 332157A...

  • Page 8: Troubleshooting

    Clean filter. used) is dirty or clogged. Intake line to pump inlet is not tight. Tighten. Hydraulic motor is worn or damaged. Bring sprayer to Graco distributor for repair. Large pressure drop in fluid hose. Use larger diameter or shorter hose.
  • Page 9 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 too low. Use only Graco approved hydraulic fluid, page 27. 332157A...

  • Page 10: Compensator Seal Replacement

    Compensator Seal Replacement Compensator Seal Replacement 4. Install new gaskets and torque screws. Torque 50 in-lb Removal 4 plcs Compensator O-Ring Assembly Lubricate before installation Gasket Adapter Note Gasket Orientation Block 1. Perform Pressure Relief Procedure, page 6. Allow hydraulic system to cool before beginning the service procedure.

  • Page 11: Displacement Pump Replacement

    Displacement Pump Replacement Displacement Pump 4. Remove clip (121). Replacement See manual 308043, 311825, or 311762 for pump repair instructions. Removal 1. Flush pump (36). Stop pump on down stroke if possible. ti20965a 5. Slide cover up (124). 2. Perform Pressure Relief Procedure, page 6. 3.

  • Page 12: Installation

    Displacement Pump Replacement 7. Unscrew three tie rods locknuts (213). 3. Slide cover (124) up over pump rod. With engine in OFF position and pump valve in ON position, pull recoil starter to move rod until it contacts pump rod. 4.

  • Page 13: Displacement Pump Replacement (2570 Pump Only)

    Displacement Pump Replacement (2570 Pump Only) Displacement Pump 4. Use crescent wrench to loosen coupler (213). Replacement (2570 Pump Only) See manual 308043, 311825, or 311762 for pump repair instructions. Removal ti21149a 1. Flush pump (36). Stop pump on down stroke if 5.

  • Page 14: Installation

    Displacement Pump Replacement (2570 Pump Only) 7. Unscrew three tie rods locknuts (213). 3. Slide cover (124) up over pump rod. With engine in OFF position and pump valve in ON position, pull recoil starter to move rod until it contacts pump rod. 4.

  • Page 15: Displacement Pump Service

    Displacement Pump Service Displacement Pump Service Disconnect Displacement Pump Reconnect Displacement Pump 1. Flush pump if possible. Stop pump on the down 1. Mount displacement pump (46) onto tie rods (47). stroke. See Parts manual. 2. Perform Pressure Relief Procedure, page 6. 2.

  • Page 16: Pump Power Head Replacement

    Pump Power Head Replacement Pump Power Head Replacement Installation 1. Install power head on unit. Removal 1. Perform Pressure Relieve Procedure, page 6. 2. Remove hydraulic lines (100, 101) from head (75). ti20951a 2. Tighten power head bolts (7). Torque bolts to 400 + 10 in-lb (45 + 1 N•m).

  • Page 17: Hydraulic Motor

    Hydraulic Motor Hydraulic Motor 450 in-lb (51 N•m) 600 in-lb (68 N•m) 930 in-lb (105 N•m) Torqued in 3 steps ti20948a 332157A...

  • Page 18: Hydraulic Pump Replacement

    Place a container under hoses to catch any dripping oil. Refilling Oil a. Replace drain plug. b. Fill tank with Graco Hydraulic Oil, ISO 46. Tank holds approximately 4 gallons. Removal ti7790a 1. Perform Pressure Relief Procedure, page 6. Allow hydraulic system to cool before beginning the service procedure.
  • Page 19 Hydraulic Pump Replacement 5. Remove belt cover screws (79), washers (78) and 7. Remove belt (19), page 22. grommets (80) (2 each side). 8. Loosen set-screws (87) on front of large pulley (4). ti7796b 6. Remove belt cover (67). ti7783b 9.

  • Page 20: Installation

    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). ti7800b ti7778b 12. Remove fittings (30, 34, 35) from pump (3) and set aside to use on the new pump.
  • Page 21 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.

  • Page 22: Belt Removal And Replacement (Recommended Method)

    Belt Removal and Replacement (recommended method) Belt Removal and Replacement (recommended method) Removing Belt Installing Belt a. Place a plastic tie around belt (19). a. Put belt over lower pulley (6) and align correctly. b. Line up belt over top left side of large pulley (4). plastic tie ti7843a ti7869a...

  • Page 23: Alternate Belt Removal And Installation

    Belt Removal and Replacement (recommended method) Alternate Belt Removal and b. Tighten engine bolts (21). Torque to 225 + 10 in-lb (25.4 + 1.1 N•m). Installation c. Check belt (19) alignment on both large (4) and small pulley (6). When properly positioned over Removing Belt pulleys, belt should be centered on pulleys and a.

  • Page 24: Replacing Oil Reservoir

    Replacing Oil Reservoir Replacing Oil Reservoir Removal 4. Loosen and remove suction hose (153). 1. Perform Pressure Relieve Procedure, page 6. 2. Drain oil from reservoir (64) following Draining Oil procedure, page 18. Keep plug for use on new res- ervoir.

  • Page 25: Installation

    Replacing Oil Reservoir 8. Remove two top bolts (86) and two bottom nuts (84) Installation securing reservoir (64) to frame. 1. Install plug (102), return elbow (31), suction fitting (32), inlet screen (89) and filter assembly (111) in new reservoir (64). ti20939a ti7893a ti20940a...
  • Page 26 Replacing Oil Reservoir 3. Replace bolts (86) and nuts (84). Tighten bolts. 7. Reattach suction hose (153). Toque to 600 + 10 Torque to 125 + 10 in-lb (14 + 1.1 N•m). in-lb (68 + 1.1 N•m). 4. Connect coolant line to reservoir (64). Torque to 225 in-lb (14.1 N•m).

  • Page 27: Changing Hydraulic Fluid Filter

    Changing Hydraulic Fluid Filter Changing Hydraulic Fluid Filter Removal Installation 1. Install new o-ring (113) from kit. 2. Install new filter (108) over cap (155). 3. Install cap (155) and filter (108) in filter housing 1. Perform Pressure Relieve Procedure, page 6. (111).

  • Page 28: Cooler Replacement

    Cooler Replacement Cooler Replacement 4. Remove screws (79), washers (78) and support bar (77) from cooling coil (72). Removal 1. Perform Pressure Relieve Procedure, page 6. 2. Loosen ground screw and remove ground clamp (95) from sprayer. ti7794b 5. Remove coil (72) from sprayer frame. ti7799b 3.

  • Page 29: Installation

    Cooler Replacement Installation 3. Reconnect return line to oil tank and hydraulic line to cooler. Torque to 225 in-lb (25.4 N•m). 1. Install new coil (72). Replace support bar (77), washers (78) and screws (79). Tighten screws. ti7802b 4. Replace ground wire (95) and tighten screw. Torque to 25-30 in-lb (2.8 - 3.4 N•m).

  • Page 30: Engine Replacement

    Engine Replacement Engine Replacement Removing Pulley NOTE: This procedure is only necessary if you are replacing the motor. When you install a new motor you reuse the existing pulley. Removal Removal a. Loosen set screw (87) located on the side of the 1.

  • Page 31: Engine Replacement

    Engine Replacement Engine Replacement ti20932a 332157A...

  • Page 32: Removing Handle

    3. Remove frame tube plugs (120) located behind the wheels. Fixed Mounting (optional) To prevent damaging the unit when transporting it in a truck or on a trailer, Graco recommends fixed mounting to the vehicle. 4. Insert plugs (120) in upper frame handle tubes (a). Repositioning Handle Before you can secure the unit to a truck or trailer bed, you must reposition the handle.

  • Page 33: Securing Unit To Vehicle Bed

    Securing Unit to Vehicle Bed Securing Unit to Vehicle Bed For fixed mounting, fasten U-bolts over sprayer frame 2. Place U-bolts over sprayer frame and through holes as indicated in the following illustration. in vehicle bed. Place a washer and nut over bolt end.

  • Page 34: Notes

    Notes Notes 332157A...

  • Page 35: Notes

    Notes Notes 332157A...

  • Page 36: Graco Standard Warranty

    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.

This manual is also suitable for:

Gh 16u279Gh 16u280Gh 16u278Gh 16u285Gh 16u281

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