If you've got nitrogen-charged, rebuildable shocks on your truck or 4x4, then you might have experienced some sort of leak down in nitrogen pressure for one reason or another. Technically, rebuildable shocks are not supposed to leak, but over time seals or valves can let N can leak out, or incurred damage can necessitate a recharge.
And though you really are supposed to change shock dampening with shock valving, you can make minor adjustments manipulating the nitrogen pressure in the reservoir. Most shocks are recommended to run at around 200 psi, but we have seen guys run anywhere from 160 psi to 260 psi in their shocks.
But how do you even know what pressure levels you have in your shocks? Most good tire pressure gauges only go up to 100 psi-well below any reading that a properly-pressurized shock would give. And on top of that, what would you do to recharge your shock if you were at your house with your truck immobilized, much less in the middle of nowhere in the dirt?
And this is why Power Tank has taken their well-known CO tank technology and gone another step with this completely portable N Race Shock Inflator Kit. With Power Tank's nitrogen kit, you can check, change, refill, and recharge your own rebuildable shocks without having to stop by a shop that carries nitrogen shock filling equipment.
Power Tank's nitrogen tank is refillable and comes empty for shipping purposes, but you can get them filled at your local welding supply shop or any other place that carries nitrogen. Power Tank even supplies the refill kit that allows you to scavenge nitrogen off of any larger nitrogen tank.
 The Nitrogen shock kit comes...  The Nitrogen shock kit comes with everything you see here, all included in a very handy plastic briefcase lined with cut-out foam that holds everything securely in place.The Power Tank kit comes with the nitrogen bottle, a nitrogen bottle regulator, the N Deluxe Shock Inflator, a N Power Filler Kit, a wrench to tighten and loosen all the fittings, and a shoulder sling to hold the tank (leaving your hands free to mess with the fittings when filling shocks). |  We started by filling the...  We started by filling the tank with nitrogen from a larger tank using the N Filler Kit. Using a quick-connect fitting, the .... |  .....filler adapter ties the...  .....filler adapter ties the portable tank to a larger nitrogen tank. The little silver knob on the top of the filling block is used .... |
 .....to release residual pressure...  .....to release residual pressure in the line after tank-filling is completed. |  The Power Tank nitrogen tank...  The Power Tank nitrogen tank comes with a red anodized cap that unscrews to allow placement of the nitrogen regulator when you are ready to fill the shocks. The bottle has a little gauge on it as well for filling purposes, but the regulator gauge will give you a more accurate tank reading. |  An N Deluxe Shock Inflator...  An N Deluxe Shock Inflator is used to fill the shocks. It uses a high-quality liquid-filled gauge that reads from 0-400 psi. The inflator uses a quick-connect that slides into the side of the bottle's regulator..... |
 ......The inflator's end adapter...  ......The inflator's end adapter threads directly onto the Schraeder valve found on the end of most rebuildable shocks. |  With the inflator hooked onto...  With the inflator hooked onto the end of the shock, the regulator's knob should be opened up and you should hear no leaks if everything is tightened properly. The brass knob on the inflator should be opened up slowly and you should start seeing pressure build on the inflator's liquid-filled gauge. We usually keep our shocks filled with around 200 psi of nitrogen pressure. |  The entire Power Tank nitrogen...  The entire Power Tank nitrogen shock charging system is held in this durable plastic suitcase. You can throw it in the back of your truck along with the rest of your equipment without fear of damaging your nitrogen filling kit. |