2. Remove the compressor head, pistons and cylinder.
3. Remove the cartridge holddown screw and cage.
4. Remove the packing box cartridge by rotating the
flywheel or by lifting the packing cartridge upward.
After the packing box cartridge has been removed
from the piston rod, remove the oil deflector ring from
the side opening on the packing box cartridge.
5. On the lower V-ring packing set, remove adjusting
screw, old packing, washers, and packing spring
from the bottom of the packing box cartridge. Do not
remove the retainer ring.
6. On the upper V-ring packing set, remove the upper
retainer ring, washers, old packing, and packing spring
from the top of the packing box cartridge. Do not
remove the second (lower) retainer ring.
Assembly of Packing
Replace packing as required and always use new O-rings
during assembly.
Lower V-ring packing set
1. Clean and lightly coat packing area inside packing
box cartridge with oil.
2. From the bottom, install a packing washer, packing
spring and another packing washer.
3. Insert one male packing ring, four packing rings and
one female packing ring one at a time.
WARNING
Note the packing direction shown in
Appendix E.
Push in each one completely before adding the next
ring.
4. Install adjusting screw so that locking device is
engaged into first thread in packing box cartridge.
Upper V-ring packing set
1. Clean and lightly coat packing area inside packing
box cartridge with oil.
2.
Packing specification A:
Insert a washer and one
female packing ring followed by four V-rings and a
male packing ring.
WARNING
Note the packing direction shown in
Appendix E.
Push in each V-ring completely before adding the
next one. Next, insert a washer, packing spring and
another washer.
3. Push down on washer and install retainer ring.
4. Install packing installation cone (part number 4005)
over the threaded end of the piston rod.
5. Before installing the packing box cartridge over the
packing cone and piston rod, you must insert the oil
deflector ring through the side opening of the packing
box cartridge. The oil deflector ring should rest on top
of the lower packing set. Make sure the oil deflector
ring is centered over the piston rod opening before
sliding packing box cartridge over the installation cone
and piston rod.
6. Install and tighten cartridge holddown screw with
special wrench mounted on the side of the compressor
(part number 2901).
7. Remove packing installation cone.
8. Replace the cylinder, pistons and head. For proper
assembly of the cylinder, pistons and head, see
assembly details in Sections 4.2, 4.4, 4.6 and torque
specifications and sequence listed in Appendix B.
9. Rotate unit by hand to ensure proper assembly.
10. Refer to Section 4.5 for piston rod packing adjustment.
4.7 Bearing Replacement for
Crankcase and Connecting Rod
1. To replace the crankcase roller bearings, wrist pin
bushing and connecting rod bearings, begin by
removing the head, cylinder, pistons, crosshead guide
and crosshead assemblies.
2. Drain the crankcase and remove the inspection plates.
3. Before disassembly, choose and mark one connecting
rod and the corresponding connecting rod cap.
WARNING
DO NOT MIX CONNECTING RODS AND CAPS.
Loosen and remove the connecting rod bolts in
order to remove the crosshead and connecting rod
assembly.
4.7.1 Wrist Pin Bushing Replacement
1. To replace the wrist pin bushing, remove the retainer
rings that position the wrist pin in the crosshead.
2. Press out the wrist pin so the crosshead and
connecting rod may be separated. Inspect the wrist
pin for wear and damage and replace if necessary.
3. Press out the old wrist pin bushing and press a
new bushing into the connecting rod, making sure
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