MK Products Python Rev.D - Manual (Page 11)

Python Owner's Manual - Page 4
3. Once the drive roll is loose, continue to spin drive roll in the clockwise
direction to remove the drive roll from the torch.
4. Install a new drive roll on the left-hand threaded shaft. The drive roll will
self-tighten when it is feeding wire.
Idler Roll Installation and Removal
(Reference Figure 3)
1. Using a slot type screwdriver, loosen idler screw, taking care not to lose
lock washer under idler roll.
2. Insert new idler roll and lock washer onto screw, insuring that idler groove
is toward top and lock washer is beneath.
Figure 3
3. Tighten.
NOTE: Lock washer must be under idler roll or it will not turn freely.
Accessories
A gas flow control mechanism (i.e. solenoid or valve) is required so the
Python ® can be used on Cobra wire feeders. The following kits are available
depending on the wire feeder used. The factory set times (in seconds) for
normal and latched trigger functions is 0.5 pre-purge and 1.0 post-purge.
Gas Purge/Trigger Latch Kit .......................................................... 005-0674
This kit is required when using the Python ® on Cobramatic ® , models 150-003
& 150-005 and the CobraMig ® 260, Model 186-002.
Pre/Post/BurnBack/Spot Timer kit ................................................ 005-0196
This kit is required when using the Python ® on Cobramatic ® II, model 150-
004.
Optional Kits
Insulated Drive Roll Kits are used to prevent preheating of the wire which
may soften it and clog the liner. This picking up of current at the drive rolls
rather than at the contact tip is usually not a problem unless using too large
of a contact tip or excessively oxidized aluminum wire.
Insulated Groove Drive Roll Kit ..................................................... 005-0640
For .030" (0.8mm) dia. aluminum wire. Includes insulated drive roll
P/N 511-0102 and idler roll assy. P/N 003-1870.
Insulated Groove Drive Roll Kit ..................................................... 005-0641
For .035" (0.9mm) dia. aluminum wire. Includes insulated drive roll
P/N 511-0103 and idler roll assy. P/N 003-1870.
Insulated Groove Drive Roll Kit ..................................................... 005-0642
For .040" (1.0mm) dia. aluminum wire. Includes insulated drive roll
P/N 511-0104 and idler roll assy. P/N 003-1870.
Section C