I have an 82 gl1100I with aslow leak in air shocks should I just replace them or try new orings?

The trigger valve should release air when depressed. This release of air comes from behind the head valve. If the head valve does not pup-up when the trigger is depressed then air is leaking past the head valve orings. Try coating the head valve orings with plenty of white grease and retest. If the gun fires you know that orings are leaking. Test with no more than 100 psi. Good luck with your repair.

Air leaking from nose of gun indicates air getting past bulkhead orings. Bulkhead is white plastic frame inside of gun. Replace gold colored vinyl orings with like size buna orings. Remove cylinder from bulkhead to find two bad orings. Also replace trigger valve or vinyl orings within valve including the two orings on the firing pin. Good luck.

Dewalt framing nailers use about 6 vinyl orings that fail. These orings are yellowish in color and turn into a soft mush allowing air to leak. Replace with buna (black rubber) for long life. If air leaks out nose, replace two vinyl orings at the bulkhead and one in the head. If air leaks from the trigger valve, replace vinyl orings on the trigger pin. Good luck with your repair

This problem is caused by air leaking past orings in the head valve. Remove head and pull out the head valve. The metal surface on the head where oring makes contact should be smooth and oring should fit snugly. Of scratched or deep groove, or if oring is worn, the gun will not fire (sand with very fine paper or replace head). Also examine the headvalve where smaller oring makes contact. If small scratches are visible, remove with very fine paper or replace. To test if head valve is the problem, remove head and headvalve and apply plenty of white grease where orings make contact and replace head then test. If the gun fires, air was leaking past the orings. Good luck

Shooting continusously caused by worn orings in the trigger valve and in the gun.Dewalt framing nailers use some vinyl orings (gold or clear in color) that fail too soon in both the trigger and the cylinder spacer (white plastic). Air out the nose of gun indicates air is leaking past the cylinder spacer seals (If piston is pushed down with air leak then headvalve seal is leaking (remove nails for this test)). If piston is not pushed down with leak, remove head and pull out the cylinder with cylinder spacer (white plastic). Place the cylinder on workbench with bottom up. Push down on locking ring and remove retainer to release all the other parts. Take picture or take note of parts together and as you pull them off to aid in re-assembly. You will need to replace the two orings between the white cylinder spacer and the cylinder. Order oring kit from dewalt or just purchase one ( # 141 universal oring ) and one metric oring 74.4mm x 3.1mm from hydraulic parts store. If the piston was pushed down with air leak, replace headvalve orings in the head. The trigger valve also has vinyl orings on the trigger pin. You could try replacing the orings but hard to find . Pin uses 2mm x 1.5mm. The orings on the inner valve should fit snuggly on the outer contact surface. If the valve just falls out the the body, the orings are too loose or the body is worn. I would just replace the trigger valve to be safe, however repaired works ok if you can find the orings. Trigger orings do not come in the kit. I would also remove the nails after each use and only reinstall them after air is connected and gun seems to work as it should. The Good luck with your repair.

Air leaking around the trigger area could be caused by vinyl ball / gasket under trigger valve bushing or orings within the gun. Easy test, remove nails and connect air (assuming that air is now leaking around the trigger area). Depressing the trigger stops the leak, replace vinyl ball. Depressing trigger does not stop leak, move plunger b (plunger B, small shaft under bubber bushing next to the trigger valve) with your finger in then out to determine if air leak changes tone. If air leak changes sound or tone, then air is leaking past orings of the cylinder guide and/or cylinder plate and/ or the cylinder itself is scratched by debris where the orings make contact. Pull out the cylinder and examine the contact areas. If scratched, use 300 grit paper to smooth, if smooth, however, suspect the orings of cylinder guide (or cylinder guide is cracked). The cylinder guide is difficult to remove and install without causing damage to guide or cutting new orings when installing. Do not remove the guide unless all the other options have been checked. One last bit if information, I have noticed that some guns will leak air if the orings on the feeder piston do not fit snuggly. Make sure that leaking sound is not coming from feeder area (remove the basket and feeder/feeder pin/spring and pull out the feed piston, making sure that the largest oring is making good contact within the cylinder). Good luck with repair.

Apply a generous amount of white grease on all the orings and surface where orings make contact, assemble and apply air for short time. Carefully take apart and look for air tracking on the grease. You will notice that the air has cut path under oring showing you where air is leaking. Sand surface with very fine paper or replace parts as needed. If no tracking is found, air could be leaking past the gasket into vent hole on body of gun (notice hole on mating surface of head /body of gun) or thru the feed piston orings or trigger valve. I find that air will leak past orings if there are fine scratches on the surface where orings make contact (use maginfy glass to examine). good luck and post again if you have more questions.

Make sure no nails in gun. With air connected listen for leaking thru nose of the gun also. If leaking thru nose slightly, air is getting past the cylinder seal oring and/or top of cyl is not seating against headvalve. Repair leak to nose of gun before trying to fix head leak. With no air leaking thru nose of gun, add plenty of white grease to orings in the head (one oring at a time) to see if leak is less and/or grease will streak behind the leaking oring. Then repair as needed. May need slightly thicker oring or sand surface where oring makes contact to remove scratches that are allowing air to pass. Also air can enter the head thru the small port in the gasket leading to the head (make sure that the gasket is sealing).

May need cylinder seal # bc0438. When this seal fits loose or is cracked, air will leak past and push piston down to bottom of the cylinder. If the seal fits snuggly and looks in good order, suspect headvalve orings and cylinder spacer orings leaking. Order oring kit and seal. Use silicone paste lube on all the orings. Look carefully at the surfaces where orings make contact and remove scratches with 300 grit sandpaper(fine scratches will allow air to leak past new orings). To make the gun work with poor fitting orings. Clean inside of gun with diesel and apply plenty of silicone paste to orings (using same orings if not cut or broken). If gun works as normal, the silicone paste is temporarly sealing the orings. It may continue to work for a while untill you get new parts. Good luck with repair.

#1 If the gun only releases air from the trigger and does not fire, suspect orings on Headvalve leaking. Easy to check, remove head and Headvalve and examine the surface in head where oring makes contact with metal surface. If the metal surface looks worn / fine scratches, air is leaking past and gun will not fire. Remove fine scratches with 400 grit paper. Headvalve oring must seal or gun will not fire. If the Headvalve does not make tight seal with new oring, remove new oring and wrap some teflon tape into groove and reinstall oring. The teflon tape will make the oring fit tight against metal surface (try 1 1/2 loops of tape).
#2 If the gun fires however the headvalve gets stuck in the head after some use, Headvalve spring could be weak. Replace the spring or remove the spring and add spacer below spring to give more pressure (I use oring with same diameter as spring under the spring ).
Use silicone paste lube on all orings and surface where orings make contact. This paste is sold at Lowes in the plumbing department and swimming pool supplies. When you connect air to the gun, listen carefully for leaks out the nose or head. Slight leaks will affect how the gun works. Repair as needed. Good luck with your repair.