GSI Outdoors 100 SERIES DRYER PNEG-552 - Manual (Page 42)

42 PNEG-552 100 Series Dryer
7. Service
2. DC electric motor: The direct current (DC) motor provides the drive for the metering roll and is
located on the front left hand side of standard model dryers. The output shaft of the motor is
connected directly to the gear box assembly.
(See Figure 7F.)
The DC motor requires no operational adjustment as it is completely controlled from the control box.
3. Speed reducer gear box: The direct drive gear box provides the required speed reduction,
and transmits power to the metering rolls through a drive chain arrangement. The gear box does
not require adjustment. The drive chain should also be periodically lubricated and tensioned
as necessary.
(See Figure 7F.)
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 the
programmed amount of time, even after the metering rolls stop.
(See Figure 7F.)
This feature permits the clean-out of grain within the unloading equipment at the end of all
discharge cycles.
How to Determine a Metering Roll Problem
Figure 7G Metering Roll Drive
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. Refer to
Figure 7G, and 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 try to rotate the roll towards the inside of the dryer. If the metering
roll turns, then repeat for right hand side and 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.
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.