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#2017 RAM 5500 SERVICE DEF SYSTEM ISO#

You can use a handheld DEF refractometer to measure the concentration specifications of the fluid and also submit samples for analysis using the Urea Content (Refractive Index Method) or (from Nitrogen) tests. The percentage of Urea should be between 31.8% – 33.2% (target is 32.5%).

#2017 RAM 5500 SERVICE DEF SYSTEM ISO#

For many OEMs, DEF cleanliness is measured using ISO Particle Count and should have a result of 18/16/13 or lower. You can also visually inspect the DEF filter and storage containers for dirt or metal debris.ĭEF should meet the ISO 22241-1 standard for cleanliness and is measured using the Insoluble Matter test (<20 ppm max). Confirming DEF quality during delivery or in bulk storage by requesting the Certificate of Analysis from your DEF supplier or submitting a sample for testing according to the ISO 22241-1 standard.ĭEF is naturally clear – if it appears cloudy or colored, you may have an issue with age or contamination.Testing DEF for evidence of minerals (calcium, etc.) and composition of deposits using ICP Spectrometry or XRF Spectrometry.Visually inspecting exhaust piping and DEF injectors for presence of crystallization.Testing DEF currently in the tank may or may not indicate issues which can cause future crystallization. Testing for Crystallization:Ĭrystallization builds up over time. You can test for DEF issues in field and submit samples to the lab for review. Prevention and proactive monitoring of your Diesel Exhaust Fluid can help prevent issues.

Other Fluids: Contamination of the DEF tank from other fluids such as diesel fuel, coolant, or engine oil being added can cause damage to the SCR system and engine shutdown.Additives should not be used to thaw DEF as additives can throw off the concentration of the fluid and damage the SCR system.

Cold Weather: DEF may gel or freeze in colder climates (12✯ (-11✬)) preventing engine operation.

Most DEF is sold pre-mixed but topping up with water will affect concentrations (and could also lead to crystallization as noted above).

UREA Concentration (Dilution): Diluted DEF (too much water) reduces its NOx neutralization effectiveness.

Dirt, rust or tank scale can occur with improper of DEF storage or handling (e.g.

Dirt / Metal Contamination: Contaminated DEF can cause abrasion of the DEF pump.

Topping up your DEF system with hard water can also result in scale or deposits forming. Over-dosing can result from a partially open DEF injector nozzle, plugged DEF lines or DEF pump issues. Over-dosing occurs when too much DEF is added to the system – the DEF may not fully hydrolyze which can lead to crystalized deposits in the exhaust or injector nozzle.

Crystallization: Crystallization can occur in a couple of ways – over-dosing and hard water top ups.

COMMON DEF PROBLEMSĭiesel Exhaust Fluid quality can be affected by: When diesel exhaust fluid quality deteriorates, you may experience increased DEF consumption or reduced DEF effectiveness, equipment failure, SCR system malfunctions or component damage. Poor quality DEF can cause significant component damage, equipment failure and void the manufacturer’s warranty leading to expensive repair costs. As DEF is injected directly into your SCR system, quality control is critical for peak operation of your equipment. Diesel Exhaust Fluid (DEF) is a blended aqueous urea solution of 32.5% high purity urea and 67.5% deionized water used to reduce pollution in newer Tier 4 Final diesel engines.