Comet Executive Gas Repair
7-23
7.5 Ironing Section
The following procedures should be used
to keep the ironing cylinder and other ironing
section components operating properly:
• Drive Chain Tension Adjustment
• Ironing Cylinder Reconditioning
• Ironing Cylinder Hardened Ring
Replacement
Drive Chain Tension Adjustment
The drive chain in the right endframe powers
the feed ribbon and return ribbon drive rolls as
well as the ironing cylinder. The chain has an
adjustable tensioning arm.
Over time, the drive chain may stretch
slightly from the eects of heat and stress. If the
unit becomes excessively noisy, or if the drive
mechanisms work unevenly because of chain
slippage, it will be necessary to adjust the tension
on the chain.
Required Tools
Wrenches:
11/16”
1-3/8” or Crescent
Perform only when the unit is OFF
with power disconnected and COOL.
1. Turn power OFF at the main disconnect
switch.
2. Open the right endframe door.
3. Check the drive chain (Figure 7-22, A)
for excessive movement. There should be
very little free play in the chain.
4. Tension on the drive chain is kept by an
idler arm chain tensioner (Figure 7-22, B).
When tension on the chain becomes loose,
adjust the idler arm tensioner.
NOTE: A stretched chain that
has been adjusted may not t the
sprocket correctly and may need
to be replaced.
5. Locate the idler arm mounting bolt (Figure
7-22, C) on the inside of the endframe.
6. Loosen the idler arm mounting bolt just
enough to allow turning of the idler arm
base with a crescent wrench.
Mounting Bolt
Drive Chain
Endframe
Tension Idler Arm
Figure 7-22: The drive chain is adjusted using the
tensioning idler arm.
A
B
C
D
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