Operation and maintenance manual

Crankcase Breather Tube QSB4.5 and QSB6.7
Page 3-2 Section 3 - Maintenance Procedures at Daily Interval
Air Tanks and Reservoirs
Drain
If automatic purging or spitter valves are used, confirm the
valves are operating correctly. If a manual drain valve is
used on the wet tank, open the draincock on the wet tank
to drain any moisture accumulated in the air system. If oil
is present, the air compressor system must be checked.
Contact your Cummins Authorized Repair Location.
Crankcase Breather Tube
Maintenance Check
Inspect the breather tube for sludge, debris, or ice in the
tube.
Inspect the tube more frequently in icy conditions.
If sludge, debris, or ice is found clean the tube with
detergent and warm water or a solvent. Dry the tube with
compressed air.
Visually inspect the tube for cracks or damage. If damage
is found, replace the crankcase breather tube. Contact
your Cummins Authorized Repair Location.