Graco Dura-Flo 750 Instructions Manual
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Graco Dura-Flo 750 Instructions Manual

With severe-duty rod and cylinder
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INSTRUCTIONS-PARTS LIST
This manual contains important
warnings and information.
READ AND KEEP FOR REFERENCE.
INSTRUCTIONS
CARBON STEEL
Dura-Flo
With Severe-Duty Rod and Cylinder
Refer to page 2 for a List of Models and the Table of Contents.
GRACO INC. P.O. BOX 1441 MINNEAPOLIS, MN 55440–1441
750 Pumps
COPYRIGHT 1995, GRACO INC.
Graco Inc. is registered to I.S. EN ISO 9001
308–417
First choice when
quality counts.
Model 237–366
Model 236–459
05241
Rev. C
Supersedes B
05242

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Summary of Contents for Graco Dura-Flo 750

  • Page 1 Refer to page 2 for a List of Models and the Table of Contents. Model 237–366 05242 Model 236–459 05241 GRACO INC. P.O. BOX 1441 MINNEAPOLIS, MN 55440–1441 COPYRIGHT 1995, GRACO INC. Graco Inc. is registered to I.S. EN ISO 9001...

  • Page 2: Table Of Contents

    ....Graco Phone Number ......
  • Page 3 This equipment is for professional use only. Read all instruction manuals, tags, and labels before operating the equipment. Use the equipment only for its intended purpose. If you are uncertain about usage, call your Graco distributor. Do not alter or modify this equipment. Use only genuine Graco parts and accessories.
  • Page 4 Check the hoses, tubes, and couplings daily. Replace worn, damaged, or loose parts immediately. Permanently coupled hoses cannot be repaired; replace the entire hose. Use only Graco approved hoses. Do not remove any spring guard that is used to help protect the hose from rupture caused by kinks or bends near the couplings.
  • Page 5 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. Ground the equipment and the object being sprayed. Refer to Grounding on page 7. If there is any static sparking or you feel an electric shock while using this equipment, stop spray- ing immediately.
  • Page 6 Notes...
  • Page 7 4. Spray gun: ground through connection to a prop- parts drawing. erly grounded fluid hose and pump. NOTE: Always use Genuine Graco Parts and Acces- 5. Fluid supply container: follow your local code. sories, available from your Graco distributor. Refer to the Product Data Sheet, Form No.
  • Page 8 Installation System Accessories (continued) A pump runaway valve (C) senses when the pump is running too fast and automatically shuts off the air to the motor. A pump which runs too fast WARNING can be seriously damaged. A bleed-type master air valve (E) and a fluid drain An air manifold (G) has a 3/4 npsm(f) swivel air valve (M) are required in your system.
  • Page 9 Installation TYPICAL INSTALLATION Pump Air Line Filter Gun Swivel Wall Bracket Bleed-Type Master Air Valve Airless Spray Gun Pump Runaway Valve (for accessories) Suction Kit Air Line Lubricator Fluid Filter Ground Wire and Clamp Bleed-Type Master Air Valve M Fluid Drain Valve (required) (required;...
  • Page 10 Operation/Maintenance Pressure Relief Procedure Packing Nut/Wet-Cup Before starting, fill the packing nut (8) 1/3 full with WARNING Graco Throat Seal Liquid (TSL) or compatible solvent. See Fig. 3. INJECTION HAZARD The system pressure must be manually WARNING relieved to prevent the system from starting or spraying accidentally.
  • Page 11 Operation/Maintenance Flush the Pump Before First Use CAUTION The pump is tested with lightweight oil, which is left in Do not allow the pump to run dry. It will quickly to protect the pump parts. If the fluid you are using accelerate to a high speed, causing damage.
  • Page 12 Operation/Maintenance Shutdown and Care of the Pump CAUTION WARNING Never leave water or water-base fluid in the pump overnight. If you are pumping water-base fluid, flush To reduce the risk of serious injury whenever you with water first, then with a rust inhibitor such as are instructed to relieve pressure, always follow the mineral spirits.
  • Page 13 Turn on the air just enough to start the pump. If the pump starts when the air is turned on, the obstruction is in the fluid hose or gun. NOTE: If you experience air motor icing, call your Graco distributor.
  • Page 14 Fill the packing nut (8) 1/3 full disconnecting the entire pump. This pump is too of Graco Throat Seal Liquid or compatible solvent. heavy for one person. If you are disconnecting the displacement pump from a motor which is still 6.
  • Page 15 Service Model 237–366 Shown Torque to 61–75 N m (45–55 ft-lb) Torque to 195–210 N m (145–155 ft-lb) Torque to 68–81 N m (50–60 ft-lb) 05243 Fig. 4...
  • Page 16 Service DISPLACEMENT PUMP SERVICE 2. Using a 2–3/4 in. socket or a pipe wrench, un- screw the intake valve (5) from the intake housing Disassembly (7). Be careful to catch the intake ball (13) as you remove the intake valve, so that it does not fall and suffer damage.
  • Page 17 Service 6. Shine a light into the cylinder (2) to inspect the CAUTION inner surface for scoring or wear. Remove the two seals (11) from the cylinder. To reduce the possibility of costly damage to the rod (1) and cylinder (2), always use a plastic or wooden 7.
  • Page 18 Service Reassembly 4. For the standard leather-packed displacement pumps 238–116 and 236–455, lubricate the throat packings and place them in the outlet housing (6) 1. If it was necessary to remove the piston ball in the following order, with the lips of the v-pack- housing (9) from the displacement rod (1), clean ings facing down: the male gland (3*), four the threads of the rod and the ball housing, and...
  • Page 19 Service Torque to 61–75 N m (45–55 ft-lb). Lips face up. Torque to 325–353 N m (240–260 ft-lb). Lips face down. Torque to 258–285 N m (190–210 ft-lb). See the Throat Packing Detail at left. Lubricate. See the Piston Packing Detail at left. Apply thread sealant.
  • Page 20 Service 9. Install the seal (11*) on the intake valve (5). Lubri- 11. Install the seal (11*) on the bottom of the cylinder cate the seal and the threads of the intake valve. (2). See Fig. 8. Lubricate the seal and the threads of the cylinder.
  • Page 21 Parts Part No. 236–459 Pump, Series A Part No. 237–364 Pump, Series A 68:1 Ratio, with King Air Motor 68:1 Ratio, with Reduced Icing Quiet King Air Motor These parts are included in Connection Kit These parts are included in 235–417.
  • Page 22 Parts Part No. 237–366 Pump, Series A Part No. 237–582 Pump, Series A 33:1 Ratio, with Bulldog Air Motor 33:1 Ratio, with Reduced Icing Quiet Bulldog Air Motor These parts are included in These parts are included in Connection Kit 235–417. 05248 Connection Kit 235–417.
  • Page 23 Parts Part No. 237–370 Pump, Series A Ref. Part No. Description Qty. 33:1 Ratio, with Bulldog Air Motor 208–356 AIR MOTOR, Bulldog and riser tube See 307–049 for parts 176–529 LABEL, warning 190–500 ROD, tie; 486.5 mm (19.15”) shoulder to shoulder 186–925 NUT, coupling 184–129...
  • Page 24 Displacement Pump 238–116 Parts NOTE: Refer to page 25 for the different packing configura- Part tions available. Description 189–853 ROD, displacement; stainless steel * These parts are included in Repair Kit 238–1 17, which 189–857 CYLINDER; stainless steel may be purchased separately for standard Displacement 222–930 VALVE, intake;...
  • Page 25 Displacement Pump 238–116 Packing Kits Leather Packing Kit 238–117, for Standard Displacement Pump 238–116, Series A Part THROAT PACKINGS: PISTON PACKINGS: LIPS FACE DOWN LIPS FACE UP Description 184–248 GLAND, male; carbon steel 184–198 GLAND, female; carbon steel 109–303 V-PACKING; PTFE 184–303 V-PACKING;...
  • Page 26 Displacement Pump 236–455 Parts NOTE: Refer to page 27 for the different packing configura- Part tions available. Description 189–853 ROD, displacement; stainless steel * These parts are included in Repair Kit 237–239, which 189–857 CYLINDER; stainless steel may be purchased separately for standard Displacement 222–930 VALVE, intake;...
  • Page 27 Displacement Pump 236–455 Packing Kits Leather Packing Kit 237–239, for Standard Displacement Pump 236–455, Series A Part THROAT PACKINGS: PISTON PACKINGS: LIPS FACE DOWN LIPS FACE UP Description 184–248 GLAND, male; carbon steel 184–198 GLAND, female; carbon steel 109–303 V-PACKING; PTFE 184–303 V-PACKING;...

  • Page 28: Maximum Air Input Pressure

    Technical Data WARNING Be sure that all fluids and solvents used are chemically compatible with the Wetted Parts listed below. Always read the manufacturer’s literature before using fluid or solvent in this pump. Category Data Maximum fluid working pressure Part No. 236–459 and 237–364 King Pumps: 42.2 MPa, 422 bar (6120 psi) Part No.

  • Page 29: Mpa, 7 Bar

    Technical Data Performance Data (236–459 and 237–364 King Pumps) cycles/min KEY: Fluid Outlet Pressure – Black Curves scfm MPa, bar Air Consumption – Gray Curves m /min 49.0, 490 0.63 MPa, 6.3 bar (90 psi) Air Pressure 0.49 MPa, 4.9 bar (70 psi) Air Pressure 0.28 MPa, 2.8 bar (40 psi) Air Pressure 8.40 42.0, 420...
  • Page 30 Notes...
  • Page 31 Dimensions Mounting Hole Layout Model 237–366 Shown 94.28 mm (3.712”) 101.6 mm (4.0”) 94.28 mm (3.712”) 50.8 mm (2.0”) Three M16 x 2.0 Holes 11.1 mm (0.437”) 88 mm DIA (4) (3.464”) 0653 05242 Pump Model 237–366 1105 mm 561 mm 544 mm 257 mm 1–1/2 in.
  • Page 32 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.

This manual is also suitable for:

236-459237-364237-366237-582237-370

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