Grain Systems PNEG-1702 - Manual (Page 88)

11. Service
88 PNEG-1702 ETL Listed GSI/FFI Portable Dryer Manual
4. Unload Auger Time Delay: The delay controls the bottom auger system and causes the unload
auger (and any connected auxiliary unloading conveyors) to continue operating for a programmed
amount of time, even after the metering rolls stop. This feature permits the clean out of grain within
the unloading equipment at the end of all discharge cycles.
5. If a foreign object becomes lodged in the metering rolls and jams the system, the unloading auger
will stay in motion. However, the metering roll drive will stop and the DC motor should stall out.
The vision control system will shutdown the dryer after a 2 minutes period.
To determine if the metering problem is from blockage, perform the following test with the power OFF.
Remove the drive chain by loosening the motor mounting bolts. Place a pipe wrench on the hub of the
roller chain sprocket on the left hand metering roll at the drive end of the dryer. Apply up to 100 ft. lbs. of
force and attempt to rotate the roll toward the inside of the dryer. If the metering roll will turn, then repeat
for the right hand side. If the metering roll will turn, it can be assumed that no blockage exists and the
problem is from some other cause. Check for a break in the power train, chain, drive key, pin, etc.
How to Clear a Jammed Meter Roll (All Power “OFF”)
Place a pipe wrench on the hub of the sprocket of the jammed metering roll and turn the roll. First,
backward and then, forward several times in an attempt to dislodge the object and clear it through the roll.
If this is not successful, have an assistant turn the metering roll and attempt to locate the jam by sound.
Shutdown the fan/heater and eliminate any other noise when making this check. Once the location is
determined, the roll can be reached from inside the plenum by opening the access door for the column
that has the jam and loosening the two (2) nuts holding the metering roll slide gate high enough to reach
in and remove the object causing the jam.
CAUTION
Keep hands away from sprocket teeth to avoid injury from chain backlash, as a
result of torsion build up in the system caused by the jam.