Serving Fox shocks w/ nitrogen - Snowmobile Forum: Your #1 Snowmobile Forum

93sportwithkids · 12-03-2012, 02:59 PM

Just got my new Motion Pro Nitrogen Shock servicing setup this last weekend and got it all assembled. Due to my location here in Virginia (no local dealers) I decided to purchase the equipment to service my shocks instead of removing my shocks and sending them out to get serviced, thats alot of shipping money and down time. I will send them out when they need to be repaired or rebuilt, but for nitrogen servicing doesn't look too hard.
Are there any tricks to servicing the needle type Fox shocks? (non schrader type) I've read the 20 or so pages in the Polaris manual and it looks straight forward... inject the needle, take up the pressure, and remove the needle. Does it matter what position the shock is in, or are there any tips I should know about the self healing service ports?
I have all of my shocks pulled off of my Sport, and tomorrow night I am going to service them. I know they must be down in pressure from sitting the last few years, and last year we had no snow at all. The Polaris manual calls out the pressures by part number and we have a nice nitrogen cart with a regulator at my work. Hopefully this will be easy and I will have them back on the machine this weekend. Please message me with advise or tips. Thanks, TJ

ppolaris1010 · 12-03-2012, 04:09 PM

there pretty straight forward just dont bend the needle. you'll have to run alittle more pressure at the regulator to get to the spec it calls for and you may have to do it a couple times till it finally holds at what you want. i always do it with the shock fully extended once you pressurize it it will go there anyway.

93sportwithkids · 12-04-2012, 05:47 PM

Wow, that was pretty easy. I just did 4 shocks in about 45 minutes. 3 were down to 120 psi, one was down to 140 psi. I didn't change fluid this year because they did not get used last year. This coming fall I will change fluid if it snows and I use the sleds.

It's a lot more work removing and reinstalling them than doing the servicing.