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RAMSET RA27 Service Manual
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RAMSET RA27 Service Manual

Semi-automatic, low velocity piston type fastening tool
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RA27 TOOL
SERVICE MANUAL
07.2019

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Summary of Contents for RAMSET RA27

  • Page 1 RA27 TOOL SERVICE MANUAL 07.2019...
  • Page 2 This function test may lead you to the proper area of the tool needing service. When attempting any repair on a Ramset tool, be certain you have read and understand the operator’s manual, you have the correct tools to perform the repair, and have/wear the correct personal protective equipment for the circumstance.
  • Page 3 The troubleshooting section is intended to direct the user or repair technician to some of the more probable occurrences that may exist in the tool. It does not list all possible occurrences. To master the repair of any tool you must first know and understand how each part functions.
  • Page 4  Cause - Tool is dirty or has a broken component 1. Clean front end of tool  Follow instruction in this manual  Follow instruction in RA27 operator’s manual  Watch video on Ramset You Tube channel Tool trigger does not fully return.
  • Page 5 “poof load” or “dud shot” to variations in fastener penetration. In the RA27 piston reset is accomplished with two components, the pawls and fastener guide with integrated retention clip and ball. Inconsistent fastening is likely to be caused by dirt and debris preventing the piston from falling back into position.

  • Page 6: Front End

    RA27 SERVICE FRONT END RA27 Front End Disassembly 1. Be sure the tool is unloaded! Grasp the knurled collar and unscrew the Fastener Guide Assembly. Once unthreaded, pull it from the tool. While the single pin muzzle is shown, the magazine is removed in the same manner 2.
  • Page 7 7. Clean the front end components with a wire brush. Ramset part number PATCK contains a variety of wire brushes to assist with cleaning the RA27 tool and a variety of other powder actuated tools. 8. Industrial spray solvents or...
  • Page 8 RA27 SERVICE FRONT END 10. A round, wire tube brush is used to clean the inner surfaces. The looped handle end of the brush can be removed and chucked into a drill to speed up cleaning of the inner surfaces; i.e. inside of...
  • Page 9 RA27 SERVICE FRONT END 17. While holding the Pawls, slide the Retention Collar over the Barrel. Align the Collar so the side notch is aligned with the top notch in the housing. Then slide over the thread area. Once fully...
  • Page 10 RA27 SERVICE BACK END / ADVANCE LEVER This next section covers service on the backend of the RA27. Should the tool experience problems with load advancement, or problems within the firing mechanism, the following steps will guide you through replacing the various components and thoroughly cleaning the backend assembly.
  • Page 11 RA27 SERVICE BACK END / ADVANCE LEVER 3. After loosening the screws, pull the plate back noting its orientation. There are two spacer sleeves that the screws go through. These sleeves stick in the Mech. Housing or could come off with the plate.
  • Page 12 RA27 SERVICE BACK END / ADVANCE LEVER 7. When removing the Swivel Hook, note that there is a small spring that fits over the post on the hook and is contained in the rear handle grip 8. Remove the Strip Compartment.
  • Page 13 RA27 SERVICE BACK END / ADVANCE LEVER 11. The following photos are for reference to note position of components. 12. Mech. Housing Assembly removed from tool housing. Note the use of grease in several places in the Mech. Housing. The small amount of grease will help lubricate moving parts 13.
  • Page 14 RA27 SERVICE BACK END / ADVANCE LEVER 15. The Receiver Assembly should begin to slide out the front. The pawls hang off one of the ribs on the Receiver. As the Receiver is removed from the Housing, the pawls should fall out of position.
  • Page 15 RA27 SERVICE BACK END / ADVANCE LEVER 18. The next series of photos show the disassembly of the Mech. Housing assembly. Note the use of grease in areas of movement. As the parts are cleaned and reassembled, the grease should be applied in these areas for smooth operation.
  • Page 16 RA27 SERVICE BACK END / ADVANCE LEVER 21. Find the power adjust dial assembly. Unthread this from the indicator slider. 22. Note that there is a ball detent under the threaded portion. 23. Remove the Control Rod. Note the orientation of the spring on...
  • Page 17 RA27 SERVICE BACK END / ADVANCE LEVER 24. On the opposite side of the Mechanism housing is the advance lever. Inspect the advance lever for straightness and determine it is not bend or damaged. One reason a tool may not advance the load is dirty strip load tracks.
  • Page 18 RA27 SERVICE BACK END / ADVANCE LEVER 26. The Mech. Housing can be cleaned in a variety of ways. Find a cleaner that is safe for plastic material and will dissolve the grease and debris. 27. After cleaning the Mech. Housing and its associated parts, reassembly can begin.
  • Page 19 RA27 SERVICE BACK END / ADVANCE LEVER 28. Note the position of the spring ends. One end of the spring rests on the Control Rod Key, the other on the tab of the Mech. Housing. Note position of the Control Rod Key and the arm on the Trigger.
  • Page 20 RA27 SERVICE BACK END / ADVANCE LEVER Receiver 31. The Mech. Housing will stop at a Advance Assembly point where the advance lever is Lever against the rear part of the receiver. 32. Push the Trigger and make the Link Rod move to the end. The...
  • Page 21 RA27 SERVICE BACK END / ADVANCE LEVER 33. Use a small screwdriver and move the Advance Lever aside while applying slight pressure on the back of the Mech. Housing. This will cause it to slide into place. As you apply pressure to the PUSH Mech.
  • Page 22 RA27 SERVICE BACK END / ADVANCE LEVER 36. Locate the Strip Compartment. Install over the top of the trigger spring. This item is held in place by the pressure of the trigger spring and confined by the Tool Housing and Mech. Housing.
  • Page 23 RA27 SERVICE BACK END / ADVANCE LEVER 38. Place the Rear Handle and Swivel Hook Assembly on to the tool housing 39. Insert the Firing Pin Spring 40. Locate the metal back cap / Fixed Hook Assembly, the long screws and the tube spacers.
  • Page 24 A video is also available on front end disassembly as well as assembly at the Ramset YouTube channel. 44. After the tool is fully assembled, the tool should be function checked to be sure of proper operation.
  • Page 27 RA27 SERVICE GLOSSARY  Overdriving a Fastener – When a fastener is overdriven into the work material, the result is the fastener head is driven below the surface of the work material, essentially leaving a hole or countersink. This is caused by the load being too powerful or a soft spot in the base material.