Tier 4 Maintenance & Troubleshooting Workshop 

 

The Rental Show 

February 20, 2016  

1

Final Tier IV

ARA Show

February 20th 2016

John Deere Technology Paths

2

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Emissions Technology

Tier 3IT4

FT4

PowerTech M PowerTech E

PowerTech Plus

PowerTech PWXPowerTech M PowerTech PVX PowerTech PSX

PowerTech EWX PowerTech PWSPowerTech PWL PowerTech PVL

PowerTech PVSPowerTech PSLPowerTech PSS

Regeneration

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Passive Auto Parked/Manual Service

Heat - Fuel - DOC Required

Active RegenerationPassive Regeneration

Regeneration Types

Heat Required

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Indicators Description Operator ActionExhaust Filter Cleaning Indicator Active when:

1. Exhaust gas temperature is high2. Elevated idle is active3. Exhaust filter cleaning is in process

Machine can be operated as normal. If operating in an area where high exhaust temperatures may be an issue, disable exhaust filter cleaning by using the disable feature.

Exhaust Filter Needs Cleaning Indicator Active when:ECU Request exhaust filter cleaning

If below 1200 rpm, increase throttle and allow auto cleaning to be performed

Exhaust Filter Needs Cleaning Indicator Active when:ECU will limit engine power until exhaust filter cleaning occurs

Begin a manual / parked cleaning.

Exhaust Filter Needs Cleaning Indicator Active when:Exhaust filter requires service. Machine power is limited.

Service the exhaust filter.Contact your servicing dealer.

Auto Cleaning Disabled Indicator Active when:Auto exhaust filter cleaning is disabled.

If possible, enable auto cleaning

Operator Interface Symbols

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• Manage temperature

• Will only engage when rpm

is already above 1200

• Will continue until

regeneration complete

• Exhaust filter cleaning

indicator lamp on

Elevated Idle

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Implementation Examples

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Operator Interface – SCR Related ONLY

Located adjacent to DEF level indicator

May flash or change color when DEF level is low

Displayed when SCR system fault is detected. Alerts operator that system fault will result in derate.

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Derate 1- DEF Fluid Level ONLY

Speed = Not Affected

Torque = 5% / minute

Speed

Torq

ue

Peak Torque Rated

EPA Mandated Derates

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Derate 2: Empty DEF Tank or DEF/SCR faults• Speed = 150 rpm / minute • Torque = 5% / minute

Speed

Torq

ue

Peak Torque Rated

Derate = 50% Torque, Low Idle Speed

EPA Mandated Derates

Electrical

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John Deere Electronic Engine Controllers

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ECU Software Complexity

Diagnostic Trouble Codes

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• Air Cooled

• Fuel Cooled

• Same internal components

Use extreme caution when using High Temp Pressure Washer on ECU!!!

ECU

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Engine Sensors

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Tyco Connectors

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NOx Sensors

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LIN Modules

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Delta Pressure Sensors

OR

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Both can be found in the Operators Manual

CODESSuspect Parameter Number (SPN) Failure Mode Identifier (FMI)

* Not all codes are listed in the OM

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Engine Schematics

Located in the Engine Operators Manuals

Schematics Contain:

• Connector Numbers

• Wire Numbers

• Pin Numbers

• Component Descriptions

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Diagnostic Do’s and Don’ts

Do

Use your local John Deere dealer for diagnostic and repair whenever possible

Use Digital Voltmeter and appropriate diagnostic tools

Don’t

Attempt Swapnostics

Install unapproved devices in the machine harness

Use a test light for diagnostics

Maintenance

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Fluids

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Oil Products

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DEF Filter

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Worksite and Apps

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