2
SERVICE INSTRUCTION
Please Note!
Actual gas spring design may appear different from what
shown here.
B)* Dirt protection ring
C)* Lock ring
D)** Guide
E) Tube
F) Piston
G)* Guide ring
H)* Oil
J)* Cover screw
K)* Valve
L)* Scraper
M)* O-ring
N)* Guide ring
* = Parts included in the
repair kit
**=Separate repair kit
including the guide
also is available
Warning!
•Always read the permanently marked information
on the side of the tube before service to make sure
you use the correct repair kit.
•Failure to exhaust all gas pressure prior to
disassembling could result in serious injury.
•The maximum charging pressure is150 bar (2175 psi)
•Use only pure nitrogen gas (N2) for charging.
•Once the cover screw is removed, never lean directly
over the valve. Always direct the valve port away from
yourself and others.
•Never use extreme force on the gas spring. Charged
gas springs are under high internal pressure and
should be protected against damage.
•Always use protective jaws when clamping the spring
in a vice.
•To achieve maximum service life, keep the gas spring
protected from dirt, drawing fluids, and grinding dust.
•Always wear protective equipment incl. safety goggles
and rubber gloves, whilst servicing the gas spring in a
well ventilated area. Avoid direct contact with gas
spring lubricants and inhalation of any exhausting
gases.
•Only specially trained personnel with good knowledge
of the products should carry out the maintenance.
Disassembly
1) To obtain an easy working position, clamp the spring in
a vice (use protective jaws). Clamp the gas spring in a
leaning position (about 30°) with the piston rod
upwards. Point the valve port upwards to prevent oil
from leaking out during the service.
2) Unscrew the cover screw (J) on the tube using 5 mm
Allen key.
3) Empty all gas from the spring. Release it by screwing
the threaded end of the valve tool into the gas port until
the valve opens.
Warning! The valve (K) must not be unscrewed
until the piston rod can be pushed down by hand or
with a rubber mallet.
Once the gas is released use the opposite end of the
valve tool to unscrew the valve. Pull the valve from the
port with a pair of needle nose pliers.
4) Tap the guide (D) into the tube, using a socket and
rubber mallet, until the lock ring (C) is exposed.
Remove the dirt protection ring (B) which becomes
loose during the procedure.
Note! For model SPC 1500, the dirt protection ring
must be removed first before the guide is tapped
down into the tube.
5) Remove the lock ring (C) using the lock ring tool.
Warning! The lock ring could fly out, be sure to
wear safety goggles.
6) Pull out the piston rod (A) including the piston (F) and
the guide (D), using the T-handle.
7) Remove the guide ring (G) and the guide (D) from the
piston rod.
8) Remove the guide ring (N), rod seal (O), scraper (L)
and O-ring (M) from the guide (D).
9) Save the piston rod (A), the tube (E), the piston (F) and
the guide (D).
Inspection
10) Thoroughly clean the tube, the piston rod, the piston
and the guide.
11) Closely inspect the piston rod, the piston, the guide and
the tube. There should be no scratches or dents on the
inside surface of the tube, the piston rod or the lock
ring grooves. If these parts are scratched or damaged
in any way, then the gas spring cannot be repaired and
has to be replaced.
