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Instructions/Parts
Dyna-Star
Air Motors
For use on Dyna-Star Air Motor piston pumps, which are used in grease transfer
applications. For professional use only.
Model 26A938, Series A, 7.5 in. Air Motor
Model 26A939, Series A, 6.0 in. Air Motor
See page 3 for model information, including maximum
working pressure and approvals.
Important Safety Instructions
Read all warnings and instructions in this
manual and in your pump or package
manual before using the equipment. Save
all instructions.
Related Manuals
Manual
(English)
Description
3A7519
Dyna-Star 200:1 and Dyna-Star 120:1
Grease Pumps
®
Pump
Manual 3A7718A
EN
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Table of Contents
Related Manuals for Graco Dyna-Star 26A938
Summary of Contents for Graco Dyna-Star 26A938
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Page 1: Related Manuals
Instructions/Parts ® Dyna-Star Pump Air Motors Manual 3A7718A For use on Dyna-Star Air Motor piston pumps, which are used in grease transfer applications. For professional use only. Model 26A938, Series A, 7.5 in. Air Motor Model 26A939, Series A, 6.0 in. Air Motor See page 3 for model information, including maximum working pressure and approvals. -
Page 2: Table Of Contents
California Proposition 65 ..... 21 Graco Standard Warranty..... 22... -
Page 3: Models
Models Models Check the motor’s identification plate (ID) for the 6-digit part number. Replacement Air Motor Air Motor Part Stroke Piston Diameter Maximum Air Inlet Pressure Part Number Number Series (in.) in. (mm) psi (MPa, bar) 26A938* 25T843 4.75 7.5 (191) 100 psi (0.7 MPa, 7.0 bar) 26A939* 25T844... -
Page 4: Warnings
Warnings Warnings The following warnings are for the setup, use, grounding, maintenance, and repair of this equipment. The exclamation 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 5 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 6: Component Identification
Component Identification Component Identification . 2: Typical Installation Key: Air Motor Kit Components Air valve Pilot valve (bottom pilot valve is out of view) Top cover Bottom cover Manifold Ground screw Lift Ring, Shrouds, and fittings Air inlet, 1/2 in. npt(f) Air outlet 3/4 in. -
Page 7: Grounding
Static sparking can cause fumes to ignite or explode. Grounding provides an escape wire for the electric current. Air Motor: use ground wire and clamp (Graco P/N 222011, not supplied), as shown in F . 1. 1. Connect the ground wire (Y) to the ground screw (Z) located on the bottom of the air motor. -
Page 8: Recycling And Disposal
Recycling and Disposal Recycling and Disposal End of Product Life At the end of a product’s useful life, recycle it in a responsible manner. Manual 3A7718A... -
Page 9: Troubleshooting
Troubleshooting Troubleshooting 1. Relieve pressure before checking or servicing the equipment, following the pressure relief procedure for your system. NOTE: Check all possible problems and causes before disassembling the air motor. Problem Cause Solution Air motor will not run. Damaged air valve (17). Replace or service air valve (17), see page 18. -
Page 10: Repair
Repair Repair Preventive Maintenance Repair Air Valve Schedule Refer to Parts, on page 16 for this section. The operating conditions of the system determine how often maintenance is required. Establish a preventative maintenance schedule by keeping a record of when and what type of maintenance is needed, and then determine a regular schedule for checking the system. -
Page 11: Replace Seals Or Repair Air Valve
Repair Replace Seals or Repair Air 4. Remove the snap ring (110) from each end (F . 5). Valve 5. Use the piston and push the end caps (107) out of each end (F . 5). NOTE: 6. Remove the end cap o-rings (106) (F . -
Page 12: Reassemble The Air Valve
Repair Reassemble the Air Valve 5. Lubricate new o-rings (106) and install on the end caps (107) and install the end caps into the housing. 1. Lubricate detent cam (104) and install into housing. 6. Install a snap ring (110) onto each end to held the 2. -
Page 13: Repair Air Motor
Repair Repair Air Motor For easier reassembly, begin with the top cover (13) turned over on the workbench then reassemble the air motor from top to bottom. Refer to Parts, on page 16 for this section. 1. Lubricate and install the o-ring (9) onto the top cover (13). - Page 14 Repair 10. Install two gaskets (14) on the manifold (15). 11. Install the manifold (15) (torque 95 - 105 in-lb/10.7 - 11.9 N•m). 12. Align the air valve gasket (16) on the manifold, then attach the air valve. 13. Tighten the tie bolts (10) halfway. Work in a criss-cross pattern.
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Page 15: Notes
Notes: Notes: Manual 3A7718A... -
Page 16: Parts
Parts Parts 16* N•m) Torque to 25-30 ft.-lb (33.9-40.7 Apply NLGI No. 1, bentone-based grease. U-cup faces up. Flange (bottom seal only) faces down. See F . 8, page 13. N•m) Torque to 95-105 in-lb (10.7-11.9 Press to snap fit. Upper Bumper - Only used N•m) Torque to 30-35 ft.-lb (40.7-47.5... - Page 17 Parts Air Motor Parts - All Models Ref. Description Qty. Model 26A939 Model 26A938 Cover, lower, assembly; includes Refs. 3, 4, 9, 24A549 24A553 12, 19, 28, and 33 U-cup 1 Not sold separately. See Air Motor Seal Kits, page 18 or Lower Cover Assembly (Ref.
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Page 18: Kits
Kits Kits Air Motor Seal Kits Air Valve Parts Air Motor Model Air Motor Seal Kit 110 26A938 24A551 26A939 24A547 106† 107 112 103 104 105 111 108† 102 109† 108† 107 106† 110 Apply lubricant. Manual 3A7718A... -
Page 19: Air Valve Kits
Kits Air Valve Kits NOTE: Air valve parts are not sold individually. The table below shows possible kit options for each part. Air Valve Air Valve Air Valve Repair Kit Seal Kit End Cap Kit Ref. Description Qty. 24A538 24A536 24A361 Other HOUSING... -
Page 20: Dimensions
Dimensions Dimensions Air Motor Weight Model inch (mm) inch (mm) inch (mm) lb (kg) 26A939 11.7 (297) 11.4 (290) 8.5 (216) 23.0 (10.4) 26A938 11.7 (297) 12.9 (328) 10.0 (254) 29.0 (13.1) t in Manual 3A7718A... -
Page 21: Technical Specifications
Technical Specifications Technical Specifications Metric Maximum air inlet pressure 100 psi 0.7 MPa, 7 bar Stroke length 4.75 in. 3810 mm Air inlet size 1/2 in. npt(f) Air exhaust port size 3/4 in. npt(f) Maximum motor speed 60 cycles per minute Noise (dBa) 26A939 Sound power*... -
Page 22: 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.