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4.6.25 Hammer (285 Ipm)
Note: When replacing odd hammers (lower
blocks), both the upper and lower blocks must be
removed. See Hammer Block Assembly (4.6.26).
Removal
1.
2.
3.
Remove the hammer block assembly
(4.6.26).
Remove seven screws
m
and the hammer
retainer plate
m .
Note: The hammer springs and plungers
are captive and cannot fly out.
Each hammer block assembly has one pivot
pin. With the hammers facing upward, use
a pointed object such as the tip of a pencil
to start the pivot pin out of the hammer
block assembly. Pull the pivot pin
m
just
past the defective hammer and remove the
hammer
II.
Note: Interchanging hammers may change
flight time. Keep hammers in original
positions.
Replacement
1.
Install the new hammer and slide the pivot
pin back into location. (Check that the
bumper strips between the back of the
hammers and the hammer adjusting screws
are still in their proper location.)
2.
3.
4.
The hammer retainer plate has a small hole
on the left end and an oblong hole on the
right end. Install the plate with the two end
screws and tighten slightly, still allowing for
plate movement.
Install the remaining five screws and tighten
the screws from left to right toward the
oblong hole to eliminate any bow in the
retainer plate.
Install the hammer block assembly (4.6.26)
and plug the connectors with the label facing
upward.
5.
Install the paper guide with four screws.
6.
Check hammer flight time (4.6.23).
HAMMER BLOCK, UPPER, FRONT VIEW
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-"--'.'
Belt Printer
2851pm
4-123
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