Operation and maintenance manual

Charge-Air Cooler QSB4.5 and QSB6.7
Page 4-2 Section 4 - Maintenance Procedures at 250 Hours or 3 Months
Industrial Gas Mechanical Indicator
A mechanical restriction indicator is available to indicate
excessive air restriction through a dry-type air cleaner.
This instrument is mounted in the air cleaner outlet. The
red flag (1) in the window gradually rises as the cartridge
loads with dirt. When air restriction is indicated the air filter
must be replaced. After changing or replacing the
cartridge, reset the indicator by pushing the reset button
(2)
Air Compressor
Maintenance Check
NOTE: Depending on the application, it is possible
engines will not be equipped with an air compressor.
Inspect the compressor housing for cracks and damage.
Inspect the hydraulic pump couplings for cracks, wear, or
other damage, if equipped.
Inspect the air plumbing for splits or cracks.
Inspect the air compressor mounting nuts, including
support bracket, for loose or damaged hardware.
Operate the engine and check for correct compressor
operation.
Check for air, oil, and coolant leaks.
Torque Value:
Mounting 18 mm
Step 1 77 N•m [ 57 ft-lb ]
Torque Value:
Bracket 10 mm
Step 1 45 N•m [ 33 ft-lb ]
Charge-Air Cooler
Maintenance Check
Inspect the charge-air cooler (CAC) for dirt and debris
blocking the fins. Check for cracks, holes, or other
damage. If damage is found, refer to the vehicle, vessel,
or equipment manufacturer.