"Adjustable Piggyback Dual Springs Damper Shock Absorber" reservoir opening tool by tjheikki

Last crawled date: 3 years, 1 month ago

Designed for opening the RC car shock abrorber Adjustable Piggyback Dual Springs Damper Shock Absorber cap. To me looks like the Xtra speed shocks with similar name are the same.
To me these shocks seem rather useless without this kind of a tool as filling with oil would be very difficult, if not impossible, if not opened and the reservoirs cannot be opened with any standard tools. Mine had also the piston stuck, needed to have better access. Other than that these shocks feel very nice and offer much more adjustability than basic shocks can have.
This kind of a shocks are supposed to be oil-filled, both the body with springs and the external reservoir (check YouTube for instructions). Filling the reservoir would require screwing off the cap to allow pouring oil in, thus they need to be user-openable. These cheap ones strangely don't have any convenient way of opening, as the cap is flush with the body and there is just one ~1 mm hole 2.5 mm from the center of the lid, not really openable with any common tools if tight at all (which it should be). This tool allows using a 1 mm drill bit as the pin for opening the lid, aligning the bit and holding it perpendicular with the lid while turning it open.
Usage:
Print, pretty much any rigid-ish material fine
Take a 1 mm drill bit to open the small hole likely not fully open after printing
Push the drill bit into the hole, spiral end pointing out from the flat end
Match the flat end of the bit to the reservoir's small hole, push inside some mm
Push the reservoir end into the tool's cavity, keeping the drill bit inside the small hole
By hand hold tight the reservoir body, rotate counter-clockwise (opening direction) the tool while keeping the drillbit from falling out. Be careful not to lose the spring etc stuff falling out of the reservoir.
The lid should open rather easily, if everything lined up properly.
To re-cap; insert the cap & drillbit as in one of the photos into the tool cavity, push spring etc stuff inside the reservoir body, use the tool to screw back the cap.