How to Install or Replace a Jump Liner

1. IMPORTANT! Turn off power.
2. Remove nozzle, insulator, contact tip, gas diffuser and neck from gun.
3. Remove old Jump Liner from the back end of the neck.
4. Insert new Jump Liner making sure the liner stop is fully seated at back end of neck.
5. Take the tapered end of the neck and insert into the end fitting of the gun handle. Make sure that the liner extruding from the handle is trimmed to 1/4″ beyond the gun handle to ensure proper fit up to new Jump Liner. Secure the neck to the gun by turning the insulated nut clockwise.
6. Trim the liner at the nozzle of the neck as follows:
   • D-A1-C and D-A2-C AccuLock™ S gas diffuser = 3/4”
   • DS-A1-C and DS-A2-C AccuLock™ S gas diffuser = 5/8”
   • DS-1 and D-1 Centerfire gas diffuser = 9/16”
   • All Tough Lock® retaining heads = 3/4”
   • D118Q Quik Tip™ gas diffuser = 7/8”
   • D114Q Quik Tip™ gas diffuser = 3/4”
   • 4235 and 4635 Elliptical gas diffuser (used with 1500 series contact tips) = 3/8”
   • 4335 and 4435 gas diffuser (used with 7400 series contact tips) = 1-3/8”
7. File the cut end of the liner to eliminate burrs.
8. Reinstall the cap, gas diffuser, contact tip and nozzle.

How to Install a Jump Liner (Gasless Application)

(Applies to Necks: 1370239, 1370240, 1370241, 1370242, & 7010068)

1. Follow steps 1-4 from above, disregarding nozzle and gas diffuser in step 2

2. Trim jump liner flush with gasless neck.
3. Remove the jump liner and trim an additional
   7/16” to ensure proper fit up to the contact tip
4. Re-insert the jump liner
5. Follow step 5 from left
6. Proceed to step 7 and 8 from left disregarding
   nozzle and gas diffuser