Tips On Diesel Particulate Filter (Dpf) Regeneration; Avoid Prolonged Idling If Possible; Necessary Conditions For "Regeneration; Other Notes - Kubota ZD1600 Series Operator's Manual

OPERATING THE ENGINE

1. Tips on diesel particulate filter (DPF) regeneration

Regeneration cycle time
NOTE :
• Actual regeneration time may differ depending on ambient temperature, exhaust temperature and engine
speed.

1.1 Avoid prolonged idling if possible

• The higher in speed or load the engine operates, the higher the exhaust temperature rises. As a result, particulate
matter (PM) inside the DPF is consumed and the regeneration process is required less frequently over time.
• The lower in speed or load the engine operates, the lower the exhaust temperature. Accordingly, less particulate
matter (PM) inside the DPF is consumed and more accumulation of PM will occur, which requires frequent
regeneration. Therefore, avoid prolonged idling if possible.

1.2 Necessary conditions for "Regeneration"

• If even one condition is deviated, after starting regeneration, the regeneration will be interrupted.
– The engine coolant temperature.
– The DPF temperature.
– The engine speed is 2500 rpm or higher (depending on the environment).
• It is recommended to do the regenerating while the engine is warm and high revolution.
• Do not unnecessarily start and interrupt the regeneration process. Otherwise, a small amount of fuel becomes
mixed with the engine oil, which degrades the oil quality.

1.3 Other notes

• While the DPF is being regenerated, the engine air flow rate is automatically limited to keep up the exhaust
temperature. Because of this, the engine may sound differently, but this is normal for this engine.
• Just after the regeneration has ended, the DPF muffler remains hot. It is advisable to keep the engine running for
about 5 minutes to allow cooling of the exhaust components.
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Approximately 15 to 20 minutes
DPF REGENERATION PROCESS
ZD1611LF,ZD1611RLF,ZD1611RL