794 AC Off-Highway Truck Caterpillar


Diesel Exhaust Fluid - Fill - Emission Related Component

Usage:

794 AC HRT


NOTICE

Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting, and repair of the machine. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.

Dispose of all fluids according to local regulations and mandates.


Reference: See Operation and Maintenance Manual, "Capacities (Refill)" for the capacity of the DEF tank for your machine.

Note: Do not fill the DEF tank from a contaminated container or funnel.

Note: Do not over fill the tank. DEF can freeze and needs room for expansion.

Top Fill

Note: To access the top fill port on the DEF tank, using a portable access system (ladder, stair assembly, man lift, or other portable access system) that is suitable and compliant to local regulations may be necessary.



Illustration 1g03379943
DEF Tank Filler Cap


Illustration 2g06272390

Refer to Operation and Maintenance Manual, "Capacities (Refill)" for available DEF tank capacities.

  1. Prepare the machine for maintenance. Refer to Operation and Maintenance Manual, "Prepare the Machine for Maintenance".

  2. Clean blue DEF tank filler cap and the surrounding area.

  3. Remove the blue DEF tank filler cap.

  4. Fill the tank with diesel exhaust fluid (DEF).

  5. Install the blue DEF tank filler cap.

Refer to Operation and Maintenance Manual, "Lubricant Viscosities" for more information on diesel exhaust fluid (DEF) guidelines.

Fast Fill



Illustration 3g06147690
DEF Tank Fast Fill Cap


Illustration 4g06272391

  1. Open the cover to access the fast fill connector.

  2. Clean the area around the connector.

  3. Remove the cap and install the hose.

  4. Fill the tank with diesel exhaust fluid (DEF).

Refer to Operation and Maintenance Manual, "Lubricant Viscosities" for more information on diesel exhaust fluid (DEF) guidelines.

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