Rev E 4/08
A3534
INSTRUCTIONS FOR INSTALLING SPIRAL PISTON RINGS
ON FLOATING OR REMOVABLE PISTONS
Refer to applicable piston assembly drawing in manual
Some compression stages use spiral wound compression rings. The pistons maybe be fixed to the rod and
removable, or floating. To replace the piston rings, remove the head per service manual instructions. With
the flywheel rotated to bring the piston to top dead center, unbolt and lift the cylinder up and over the
piston, or, if directed, pull the piston out of the cylinder.
Inspect the piston for wear and replace if necessary. Replace all piston rings and O-rings. RIX does not
recommend partial replacement of rings.
1. Stretch the O-rings and roll them on one at a time using a seal tool (RIX P/N # 88-5812 or
equivalent). Alternately, roll o-rings onto the outside tapered portion of the sleeve tube provided
with the compressor (See Accessory Parts List for part number). Slide the sleeve tool over the
piston (to the farthest ring groove first) and roll the O-ring into the groove, taking care not to cut
the ring on sharp edge of the piston.
2.
Before stretching or uncoiling the spiral piston ring,
note that each ring is slightly dish shaped.
The rings should be installed with the bottom of the dish down against the piston groove
land.
3. Gently stretch the piston ring and work it into the groove over the O- ring. Protect the thin ends of
the piston ring with your thumb nail while working the ring down into the groove. The last ¼ inch
of the spiral ring may be cut off if necessary.
4. Install the top and bottom rider rings, and pressure breakers if required. (note : additional spiral
rings can be substituted for pressure breakers )
5. Slide the piston ring sleeve tool over the assembled piston, using the tapered end of the sleeve tool
to help compress the rings into the groove. (The bottom end of the piston should be inserted into
the tapered end tool, so it ends up on the non-tapered end) Gently work the sleeve tool onto the
piston, taking care not to pull out the thin ends of the piston ring.
6. After the piston has been installed in the compression sleeve tube, slide the piston back out and
examine the spiral rings. Replace any damage rings. Reinstall in sleeve.
7. When installing pistons into the top of the cylinder, place the squared end of the sleeve over the
Cylinder and press the piston into the top of the cylinder bore. The tapped hole in the piston
should be on top.
Summary of Contents for RIX 2V3B-4.1V Series
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