Kubota SK1050, Operator'S Manual

Page: 73 / 108

Service - 72
SK1050 Operator’s Manual
Recommended Lubricants/Service Key
Exhaust Cleaning - Tier 4 Only
This engine has a Diesel Particulate Filter (DPF) that purifies NOx emissions in the exhaust into nitrogen
and water. The DPF system uses a small amount of engine lubricating oil to during the high-temperature
combustion. The system cleans itself automatically, unless it is manually inhibited by the operator.
Automatic exhaust cleaning (REGEN) happens during normal machine operation when sensors in
the engine determine the need. During an engine exhaust cleaning cycle, engine exhaust can
reach high temperatures. When this happens, the high exhaust temperature icon will light.
If the jobsite is in an area where high exhaust temperature might cause a problem, inhibit exhaust
cleaning through the Tier 4 menu (see “Tier 4 menu button” on page 29) for the duration of the job
and return to automatic cleaning when the job is finished. The exhaust cleaning inhibited icon will
light and remain on until the system is returned to automatic exhaust cleaning mode.
The exhaust cleaning icon will light when the system is inhibited and an exhaust cleaning cycle is
needed.
• The icon will flash when exhaust cleaning is needed. If the area will allow it, return the unit to
automatic cleaning mode in the Tier 4 menu and let it run automatically.
• A manual exhaust cleaning cycle (DPF REGEN) is required after automatic exhaust cleaning has been
inhibited multiple times. Take system out of inhibited mode through the Tier 4 menu, set the engine to
low throttle with no load and initiate the DPF REGEN exhaust cleaning cycle. The light will remain on
steady until the manual exhaust cleaning cycle is finished (approximately 30 minutes). If manual
cleaning is not done when indicated, the engine will derate.
• Ash buildup in soot filter part of DPF will have adverse effects on engine performance. The soot filter
must be serviced every 3000 hours of operation or more often if high-ash oil and/or fuel is used. See
your Yanmar engine distributor for this service.