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Instructions
GT 750 Grease
Pump
For transferring grease using a medium pressure, high volume pump. For professional use
only.
Model No.:
24W337, Series A: 400 lb (180 kg) drum length
25D116, Series A: 120 lb (55 kg) drum length
24W498, Series A: stubby length
3600 psi (24.8 MPa, 248 bar) Maximum Working
Pressure
100 psi (0.7 MPa, 7 bar) Maximum Air Inlet Pressure
Important Safety Instructions
Read all warnings and instructions in this
manual. Save these instructions.
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Summary of Contents for Graco GT 750
- Page 1 Instructions GT 750 Grease Pump 3A5363B For transferring grease using a medium pressure, high volume pump. For professional use only. Model No.: 24W337, Series A: 400 lb (180 kg) drum length 25D116, Series A: 120 lb (55 kg) drum length 24W498, Series A: stubby length 3600 psi (24.8 MPa, 248 bar) Maximum Working...
- Page 2 Warnings Warnings The following warnings are for the setup, use, grounding, maintenance, and repair of this equipment. The exclama- tion point symbol alerts you to a general warning and the hazard symbols refer to procedure-specific risks. When these symbols appear in the body of this manual or on warning labels, refer back to these Warnings. Product-specific hazard symbols and warnings not covered in this section may appear throughout the body of this manual where applicable.
- Page 3 Warnings 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.
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Page 4: Typical Installation
Installation Installation Typical Installation Key: Grounded Air Line Bleed-type Master Air Valve Air Filter Air Line Oiler Air Regulator Fluid Hose Elevator Assembly Ground Wire Follower Plate Drum Cover Air Motor 3A5363B... -
Page 5: Installation Instructions
Installation Installation Instructions Mounting the Pump NOTE: The reference letters in the following instructions refer to the Typical Installation illustration, page 4. Grounding Mount the pump securely so that it cannot move around during operation. Failure to do so could result in personal injury or equipment damage. -
Page 6: Operation
Operation Operation Priming and Pump Speed Adjustment NOTE: The reference letters in the following instructions refer to the Typical Installation illustration, page 4. 1. Open the bleed-type master air valve (B). This pump is designed to be used only in pumping 2. -
Page 7: Troubleshooting
Troubleshooting Troubleshooting NOTE: Check all other possible problems and solutions before you disassemble the pump. Problem Cause Solution Inadequate air supply pressure Increase air supply. Restricted air line Clear line. Closed dispensing valve Open valve. 1. Follow Pressure Relief Proce- Clogged fluid lines, hoses, and/or dure, page 6. -
Page 8: Displacement Pump Service
Service Before You Start • Be sure you have all necessary parts on hand. Use Graco repair kit 25D511. Use all parts in the kit for best results. • Parts included in the kit are marked with one aster- isk, for example (19*), in the text and drawings. - Page 9 Service 7. Unscrew bearing (11) from foot valve housing. 9. Loosen nut (5) and unscrew the valve housing (6) Remove the poppet check (12) and inspect foot from connecting rod (4) (F . 7). valve packings (13) (F . 5). 10.
- Page 10 Service Reassembly 4. Replace piston seal (22*) on valve housing piston (7) (F . 11). 1. Apply a thin layer of grease to o-ring (17*) and throat seal (19*)and install parts in pump base (21) 5. Screw the connecting rod (4) into the valve housing .
- Page 11 Service For Steps 7 to 12 refer to F . 13. 13. Slide priming plate (9) (beveled edge up), followed by washer (28), onto priming rod (8). Insert a 7. Slide bearing (11) onto priming rod (8) with the step wrench through a slot in the foot valve (10) and side facing the bottom of the pump.
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Page 12: Check Valve Adjustment
Service Check Valve Adjustment This pump has an adjustable piston ball check. To change the piston ball travel: 1. Relieve pressure, page 6. 2. Loosen nut (5). 3. Turn the piston valve housing (6) counterclockwise to increase the ball travel and clockwise to decrease the ball travel. - Page 13 Parts Parts 3A5363B...
- Page 14 Parts Parts Part Description Part Description SEAL, cylinder, double acting 24R015 MOTOR, assy, air, 7.5 in, 123208 SCREW, cap, hex head 17C099 GLAND, packing 17C100 FITTING, connecting rod 17C098 SPACER, throat 100023 WASHER, flat 17C102 ROD, connecting, model 24W337 PACKING, o-ring 17C254 ROD, connecting, stubby, 158674...
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Page 15: Technical Specifications
Technical Specifications Technical Specifications GT 750 Pump Metric Fluid Pressure Ratio 36:1 Air Pressure Operating Range 40-100 psi 0.3 - 0.7 MPa (3-7 bar) Maximum Working Pressure 3600 psi 24.8 MPa (248 bar) Maximum recommended pump speed 60 cycles per minute Air Motor Effective Diameter 7.5 in. - Page 16 Technical Specifications Dimensions 400lb Drum 120 lb Drum Stubby Dimension Table Description Air Inlet, 1/2 inch NPT Fluid Outlet, 1 inch NPT 2 inch NPT mounting adapter 3A5363B...
- Page 17 Notes Notes 3A5363B...
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Page 18: 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.