Cannondale Headshok damper service - full video

Fork model: Fatty DL 70 Ultra 2001.

In this video (almost uncut version) you will see how your damper is treated in Headshokexpert service workshop. If you're brave enough to do this service on your own, this video can help you to visualize steps of service. In that case, check our web page for some useful tools that make your life much easier.

No verbal comments in video because original audio turned out bad, sorry for that. Send us an email for any concerns you might have.

https://new-industry.art/bicycles/hse/

video timeline:
00:00 Remove damper from fork
00:54 Remove o-rings of air piston and clean
01:30 Remove lower oil cap
01:39 Pour out old damper oil
01:52 Unscrew upper oil cap and remove damper body (for newer dampers use KH004)
02:11 Clean clamping surfaces with brake cleaner to protect damper rod surface from impurities
02:27 Remove lock out rod
03:05 Remove valve
04:28 Remove upper oil cap
05:00 Remove U-cup seal from oil caps
05:26 Clean oil caps thoroughly
05:46 Clean damper body from all possible contamination
06:15 Use service parts KF236, plus additional o-rings not found in the kit
07:33 Service the air cylinder cap
08:09 Install new U-cup oil seals in oil caps (with special blunt screwdriver)
09:40 Install positive bumper o-ring, then top oil cap on damper rod, then negative bumper stack
09:55 Some Loctite on clean threads, for the valve
10:05 Assemble and install valve
12:09 Install lock-out rod
12:26 With air piston o-ring in place, install into damper body
13:03 With lock-out valve open, pour in some fresh damper oil so it overflows.
13:10 Then cycle to remove air from the hydraulic system
13:18 With "bullet tool" position the lower cap and screw it in until it get's harder to turn
13:42 Then release oil pressure and screw the lower cap into damper body until it stops
14:15 Close the bleeding screw
14:45 Remove oily residues with brake cleaner spray
15:07 Negative coil spring heavily corroded, has to be replaced with new
16:05 Install air piston (plunger) in place and into the air cylinder with high quality grease
16:27 Insert the damper into fork and install properly
17:05 Pump up the air and tighten stem bolts to specific torque
17:35 Ready to ride!