DEF TANK REPLENISHMENT SYSTEM • OPERATION MANUAL — REV. #0 (09/11/20) — PAGE 17
MAINTENANCE
MAINTENANCE
Very little maintenance is required for the DEF Replenishment
System. If it ever becomes necessary to drain/flush the
100-gallon (379 liter) DEF tank, do the following:
1. Place a drain pan underneath the drain port (Figure 13)
located at the bottom center of the frame/skid.
2. Remove the four screws that secure the DEF drain
access cover to the skid.
3. Place the DEF drain valve in the
OPEN
position to let
fluid flow into the drain pan.
4. Remove the DEF tank cap.
5. Insert a garden hose or equivalent into the DEF tank
fill port and flush. Be sure to use fresh, clean water
when flushing the tank.
6. When flushing of the DEF tank has been completed,
place the DEF drain valve in the
CLOSE
position and
reinstall the access cover.
7. Reinstall the DEF tank cap.
Figure 13. Flushing DEF Tank
FILL TANK
PORT
DEF TANK
CAP
DRAIN ACCESS
COVER
DRAIN
PAN
CLOSED
OPEN
DEF TANK
VALVE
DEF DRAIN
ACCESS
SOURCE
WATER
