CB9A-020 page 14
MAINTENANCE
5. PACKING BOX ASSEMBLIES
Before installing the packing boxes into the crosshead guide, inspect the piston rods for scoring or
roughness. Remove any burrs or sharp edges. Lubricate the piston rods and packing box O-rings with
light oil. Do not damage the packing when starting it over the rod. Use of a Blackmer packing
installation tool is recommended.
Single-Seal Models (HD161, HD361, HD601)
a. Insert the packing box O-ring into the crosshead guide.
b. Start the packing box assembly, short end down, over the piston rod and into the counter-bored hole of
the crosshead guide.
c. Install the packing box retainer ring with new nylon locking inserts, and tighten securely.
d. Repeat the above steps for the remaining packing box.
Double-Seal Model (HD162)
a. Insert the lower packing box O-ring into the crosshead guide.
b. Install the packing box assembly over the piston rod and into the counter-bored hole of the crosshead
guide.
c. Repeat steps a - b for the other lower packing box.
d. Install new O-rings in the bottom of the distance piece. A small amount of grease may be used to hold
the O-rings in place during assembly.
e. Set the distance piece over the piston rods and against the crosshead guide, install and tighten the
upper distance piece capscrews.
f. Install each upper packing box O-ring over the piston rods.
g. Install each upper packing box over the piston rods.
Double-Seal Models (HD362, HD602)
a. Insert the lower packing box O-ring into the crosshead guide.
b. Start the packing box assembly, short end down, over the piston rod.
c. After the lower set of packing is started over the piston rod, make sure the oil deflector ring is properly
aligned (with the flat side down) over the piston rod. Use the hole in the side of the packing box to
center the deflector ring. Once the deflector ring is over the rod, the packing box can be fully inserted.
d. Install the upper packing box O-ring on the end of the packing box.
e. Place the packing box spacer ring over the O-ring.
f. Install the packing box retainer ring with new nylon locking inserts, and tighten.
g. Repeat the above steps for the remaining packing box.
Triple-Seal Models (HD163, HD363, HD603)
a. Follow the instructions for the Double-seal model.
b. Install new O-rings in the bottom of the upper distance piece. A small amount of grease may be used
to hold the O-rings in place during assembly.
c. Set the upper distance piece over the piston rods and against the crosshead guide, loosely install
upper distance piece capscrews.
d. Install each upper packing box O-ring over the piston rods.
e. Install each upper packing box over the piston rods.
6. Rotate the crankshaft by hand a few times, then uniformly tighten the crosshead guide capscrews (and
upper distance piece capscrews on triple-seal models) per the Bolt Torque Table.
7. New packing must be broken in. Refer to the end of "Seal Replacement".
8. CYLINDER ASSEMBLY
a. Install new O-rings in the bottom of the cylinder. A small amount of grease may be used to hold the
O-rings in place during assembly.
b. Set the cylinder over the piston rods and against the crosshead guide.
c. Loosely install the cylinder capscrews.
9. Rotate the flywheel by hand to ensure the compressor turns freely.
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