Page 12 of 26
REPLACING THE PRINT DRUM INDEX SPRING
ON THE HP-200 INDEXING CODER
Replacing the Index Spring requires removal of the print drum. Please follow these
same disassembly steps for replacing the Drum Cover.
1 -Remove the Index Stop Pin and Washer us-
ing a 5/16” hex wrench.
If you are only replacing the Drum Cover, hold the
Print Drum from rotating when this pin is being re-
moved. As soon as the Stop Pin is removed the
index spring will relax, rotating the print drum in the
process.
2 -Loosen only the top Print Drum Axle Re-
taining Screw using a 9/64” hex wrench.
3 -Pull the Spring Tension Adjuster out of the
Axle.
4 -Remove the two button head screws that
hold the Side Frame to the Back Frame us-
ing a 3/32” hex wrench.
The Tension Adjuster has a flat body which fits into
the slotted end of the Print Drum Axle. This part is
used to pretension the Index Spring as explained
later.
Note: Both Side Frames can be removed, however,
for Print Drum removal purposes, remove only the
Side Frame with the Ink Roll Eccentric Knob as
shown in Figure 25.
Leaving the bottom screw tight will simplify the re-
assembly procedure.
FIGURE 22
FIGURE 23
FIGURE 24
FIGURE 25
MAINTENANCE
