Gehl R135, Operator'S Manual

Page: 120 / 206

116 50940193/DP0415
Diesel Particulate Filter (DPF) Regeneration
Procedures (DPF Models)
The Diesel Particulate Filter (DPF) treats exhaust emissions in compliance with Tier 4
emission standards. The DPF filter relies on high exhaust temperatures. Periodic DPF
maintenance (regeneration) is required, dependent upon machine operation load /
temperature.
Note: Machines operated primarily at high loads and operating temperatures require less
frequent DPF maintenance. Extended periods of engine idling rapidly increases DPF soot
levels, requiring more frequent regeneration operations.
There are 3 modes of DPF regeneration:
• Passive / Assist Regeneration: Occurs automatically without operator input. Passive/
assist regeneration does not affect machine operation.
• Reset Regeneration: Occurs automatically, but can be inhibited by the operator.
Increases exhaust gas temperatures. Reset regeneration occurs approximately every
100 hours of operation. See “Reset Regeneration” on page 117.
Note: Reset regeneration effectiveness is improved if the machine is operated at mid- to
high-throttle settings when reset regeneration mode is in progress.
• Stationary Regeneration: Requires operator action to initiate and takes approxi-
mately 25-30 minutes to complete. See “Stationary Regeneration” on page 118.
Important: The machine cannot be operated and must be parked in a well-ventilated area
away from flammable materials when stationary regeneration is in progress.
There is a possibility of carbon monoxide
poisoning if stationary regeneration occurs in an
enclosed space. Always perform stationary regeneration in a well-
ventilated area.
During regeneration, there will be high exhaust gas
temperatures, even at low load. Stay clear of the
DPF during regeneration.
WARNING
WARNING