Buffer and Piston Replacement
!WARNING: Always unload a powder actuated tool before disassembling, replacing barrel, cleaning, or assembling.
IMPORTANT: This tool is equipped with a piston buffer. The buffer stops the piston before it makes contact with the muzzle cap. This protects the barrel and muzzle cap. Inspect and replace the buffer on a regular basis.
TO REASSEMBLE:
IMPORTANT: Inspect piston ring and replace if worn.
1.Install new piston ring onto piston (if required).
a)Remove old piston ring.
b)Install new ring. The piston ring consists of three turns. Place one end into groove and twist around piston until it is com- pletely in groove.
New Piston | Worn Piston |
Buffer | Buffer |
TO REPLACE BUFFER AND PISTON:
1.a) Remove tang cap, tang spring, and tang. Slide barrel assembly from receiver.
Barrel Assembly | Receiver |
Tang
Tang Spring
Tang Cap
Piston
Piston Ring
2.Place buffer, small end first, in muzzle cap. Push new piston all the way into the barrel. Screw muzzle cap into barrel.
Muzzle Cap | Barrel |
| |
| Piston |
| Piston Buffer |
| (Small End in Muzzle Cap) |
b)Remove muzzle cap from barrel by un- screwing counterclockwise.
Muzzle Cap | Barrel |
3.Reinsert barrel assembly slotted side down into receiver. Turn tool over. With barrel touching breech, insert tang and tang spring into hole on bottom of receiver. Make sure tang drops into the slot in the barrel. Screw on tang cap completely. Tang cap must always be kept tight to ensure proper operation of tang.
c)Insert a rod or screwdriver into barrel chamber and push piston and buffer out of barrel.
PistonBarrel
Breech
Tang Cap
Tang Spring
Tang
Slot in
Barrel 
Piston Buffer
101437
Barrel
Chamber
Receiver
Barrel Assembly
21