RIX Industries MAN-2PS2B-N2 - Piston Assembly

RIX Industries MAN-2PS2B-N2 Page 16
1. Install new O-ring expanders, compression rings and rider rings on the pistons.
2. Compress the rings by hand to ensure the rings fully sit in the piston grooves.
3. Slide the cylinders over the pistons, taking care not to extrude the rings.
4. Install the heads per Section 7.3.
5. Rotate the flywheel by hand several times to ensure parts are free. See Section 7.9 for
piston clearance adjustment.
7.7 Piston Assembly
The 1st stage piston assembly is installed with the connecting rod and retaining cap. This assembly
must be removed to service the connecting rod and all bearings.
To remove the 1st stage piston assembly, reference Figure 2 and use the following procedure:
1. Remove both heads and cylinders per Sections 7.3 and 7.5.
2. Rotate flywheel to position the 1
st
stage piston at top dead center.
3. Remove hex screw on bearing plate.
4. Gently slide assembly outward by pulling connecting rod off crankshaft, allowing neck of
piston to pass through slot in crankcase. Move assembly to a clean surface for further
disassembly.
5. With a pair of snap ring pliers, remove snap rings from wrist pin bore.
6. Remove the wrist pin—the piston may require heating or a press to do so.
7. Remove the connecting rod.
8. Clean and inspect piston, wrist pin, and bearings for wear or damage. Wear must be within
the tolerance specified in Section 7.10.
To reinstall the 1st stage piston assembly:
1. Install the connecting rod, wrist pin, and snap rings in the 1
st
stage piston assembly.
2. Install the assembly on the compressor crankshaft.
3. Install bearing plate and hex screw to fully secure the assembly to the crankshaft. Hex screw
must be secured with a small amount of Loctite 7471 Primer/Activator and 272
Threadlocker (RIX P/N’s: 35-8595 & 35-10440) and torqued to 180 in-lbs.
4. Reinstall cylinders and heads per Sections 7.3 and 7.5.