Preventive Maintenance Comet Executive Gas
4-14
Grease Bearings
Required Tools
Clean cloth
Grease gun
Grease: EP, bentonite clay, NLGI 2,
1000 cSt viscosity
Perform only when the unit is OFF
with power disconnected and COOL.
Bearings marked with yellow “GREASE”
tags are not subjected to as much stress and high
temperatures as the bearings that require weekly
greasing.
Therefore, the bearings with yellow “GREASE”
tags do not need to be greased as frequently as
the bearings with yellow “GREASE WEEKLY”
tags. Use the same high temperature grease for
all the bearings.
For instructions on greasing bearings labeled
with yellow “GREASE” tags, refer to Grease
“Weekly” Bearings on page 4-8.
Oil Drive Chain and Tension Springs
The drive chain in the left endframe (Figure
4-10, A), and the compression roll tensioning
springs (B), and return ribbon tensioning
springs (C) in both endframes require monthly
maintenance.
Required Tools
Clean cloth
SAE 90 grade oil
Perform only when the unit is OFF
with power disconnected and COOL.
1. Turn power OFF at the main disconnect
switch.
2. Open both endframe doors.
3. Clean o old lubricant from the drive
chain and tensioning springs.
4. Lightly lubricate the chain and springs
with a good quality SAE 90 grade oil.
5. Close and secure both endframe doors.
WARNING
Never operate the unit unless
all safety covers are in place
and all safety equipment is
working correctly.
Figure 4-10: The drive chain is located inside the
right endframe.
B
C
A
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