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Installing Fox Racing Shox Hand Adjusters

Posted in How To: Suspension Brakes on May 22, 2017
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Have you ever found yourself speeding through the desert with your friends, watching the cacti fly by your window, thinking “it doesn’t get much better than this!” When all of a sudden you look ahead and notice that the route you are taking starts to change from wide-open speeds to steep rockcrawling terrain. If you have, then it’s at this time that a series of thoughts run through your mind. “My buddies didn’t mention rockcrawling. I set my shocks to high-speed compression setting. Did I even bring my tool bag? Ah the dilemmas of the off-roader. Fortunately, the minds at Fox Racing Shox have created a solution for just such a situation. Introducing the Fox Racing Shox Hand Adjuster.

Fox has designed three types of hand adjusters that fit onto a variety of Fox Shox. First, the Dual Speed Compression Adjuster (DSC). This setup uses two adjuster knobs that allow 10 separate low-speed and 12 high-speed compression levels for all 7/8 shaft smooth body and remote reservoir coilover shocks.

Here’s the new Fox QAD adjusters.

Are you looking for more specific fine-tuning of your suspension from very soft to very firm? This is where the Low Speed Compression (LSC) Adjuster comes in handy. If you’re running Fox 2.0 reservoir shocks, you can use this LSC setup to change your ride in just 10 clicks of the adjuster. The physical clicks felt on the knob when adjusting are very firm and specific at either end of the adjustment so you can easily gauge how much adjustment you’re making. Fox has also improved this design to increase oil flow, eliminating the harshness associated with restricted oil flow. With this setup, you can quickly transform your ride with a few simple clicks of the knob.

Now for the Quick Adjust Bypass (QAB). This setup is available for all Fox 2.5, 3.0, and 3.5, 4.0, and 4.3 external bypass shocks. When the trail changes, simply reach under the truck, grab a hold of the QAB and click away. Similar to the LSC, this adjuster uses firm clicks at every quarter turn so you can keep track of your adjustment. The adjuster itself utilizes the same flow and range as a standard bypass unit, and Fox uses only the highest-quality O-rings and seals to keep moisture and contaminants out. These can be ordered in blue or red.

Now let’s take a look at how to install the hand adjusters. We chose the most difficult adjuster to install, the Quick Adjust Bypass (QAB) retrofit kit.

Relieve the nitrogen pressure in the reservoir by pressing down on the stem of the Schrader valve. Your finger will do, but a small screwdriver works too.

We chose to do this installation on the RPG Fox Raptor already setup with the rear Fox 3.0 Shox. Additional supplies you’ll need for this install are here: nitrogen bottle and regulator, oil catch and funnel, dead blow hammer, internal snap ring pliers, diagonal cutters, 3/16-inch adjustable spanner wrench, 3/32-inch Allen wrench, Schrader Valve inserting tool, ⅞-inch deep socket, ⅜-inch drive ratchet and torque wrench, assembly grease and general parts cleaner spray.

This isn’t a difficult install, but it does require things that some at-home builder may not have, such as the nitrogen needed to recharge the shock. Other than that, this isn’t a hard install at all and one that anyone with a modicum of wrenching talent can do at home.

Your off-roading adventures don’t have to be difficult or stressful, and thanks to Fox Racing Shox, you don’t need to carry as many tools on your journey. In fact, you’ll look pretty cool, as your friends watch you transform your suspension in the blink of an eye—with just a few clicks of the adjusters.

With the shock on a clean workbench, first perform a thorough cleaning of the shock.
With the nitrogen released, the cap for the reservoir can be pushed in slightly using the Schrader Valve Inserting Tool. This will allow the removal of the retaining ring and the endcap to be pulled out.
With the shock set into a vise, the bearing cap safety screw is loosened with a 3/32-inch Allen wrench.
Loosen the bearing cap with a 3/16-inch adjustable spanner wrench.
With the pushrod guide assembly pushed in slightly, the retaining ring is removed with snap-ring pliers.
The rod assembly is slowly pulled out of the shock body.
The shock body will be full of shock oil so it’s carefully drained. The removed oil can be reused, therefore if any oil is lost, simply replenish the same amount.
Remove the existing Fox standard adjusters with a ⅞-inch deep socket.
A comparison of the new Fox QABs and the standard adjusters.
Apply grease onto seals and onto metering rod to hold spring in location.
Initially, only the red (rebound control) QAB is installed into the shock. It’s torqued to 50 ft-lb using the ⅞-inch deep socket.
With the shock body affixed into a vice, it’s filled with all of the oil that was dumped earlier.
Both compression (blue) QABs are installed and torqued to 50 ft-lb.
The check valves need to be “cycled” to remove any air pockets or bubbles. With the Rod Assembly inserted into the shock body, the rod guide assembly is slid down until a small amount of oil has come out, signaling that all of the air has come out.
To get the bearing assembly far enough down, the bearing cap is threaded two turns onto bearing housing, then is firmly pressed down.
The cap is unthreaded and the retaining clip is reinstalled.
Once cleaned, the reservoir endcap is greased.
The endcap is inserted into the reservoir and the retaining ring is installed.
Using the nitrogen bottle, the shock is filled with a low-pressure charge of 50-75 psi.
The bearing cap is carefully threaded onto the body then tightened using the adjustable spanner wrench followed by the bearing cap set screw using the Allen wrench.
The shock is bolted onto the vehicle and the bolts are torqued to factory specification.
Using Nitrogen bottle and regulator, the shock is charged to 200 psi. Once the cap is back on, the job is done.


Fox Racing Shox
Watsonville, CA 95076
RPG Off-Road

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