Hobart 6921 Series Operation And Maintenance Manual page 27

OM-2040 / Operation and Maintenance Manual
90D20 / Generator Sets
(2) Air Cleaner
The diesel-engine air cleaner (Fig. 6) is a dry-cartridge type. It is equipped with a service
indicator which signals the operator when the cartridge needs changing. A green "cylindrical" flag
(2) is forced upward in a glass enclosed viewing chamber (1) when air pressure within the air
cleaner housing drops below the outside air pressure. As the cartridge becomes loaded with dirt
and air, pressure within the cleaner lessens, the "flag" gradually rises higher in the glass viewing
chamber. When the "flag" reaches the top of the chamber, it locks in that position to warn the
operator that the cartridge must be changed. The "flag" is reset (unlocked) by pushing the reset
button (3) located on the indicator.
February 28/94
Revised
1. Acutator
2. Rod
3. Speed Control Lever
4. Mounting Bracket
Throttle Control and
Electric Governor
System
Figure 5
1. Viewing Chamber
2. Indicator "Flag"
3. Reset Button
Air Cleaner and Service
Indicator
Figure 6
Chapter 1-1
Page 9