Grain Systems PNEG-1702 - Manual (Page 82)

82 PNEG-1702 ETL Listed GSI/FFI Portable Dryer Manual
11. Service
Before starting any repairs or maintenance on the dryer, observe the following safety steps:
1. Isolate the whole system from the electrical supply by switching OFF the power isolator and
locking it.
2. Isolate the dryer from the gas supply by shutting OFF the main gas valve. (If necessary, lock
the valve.)
3. Keep the keys in your possession.
4. Augers and their drives may be under some degree of tension. Avoid touching these parts
with the hands until you are sure that they are free.
5. Do not reconnect the power supply until all work is completed and all guards are correctly refitted.
Seasonal Inspection/Service
The dryer is made of weather-resistant material and is designed to require minimum service. However,
each season we recommend the following items be checked before the unit is used and any damaged or
questionable parts replaced. These checks will help eliminate possible failures and assure dependable
operation of the equipment.
1. Shut off electrical power. Open the power box to control inspect for moisture, rodent damage or
accumulated foreign material. Remove any foreign material present. Inspect and tighten any loose
terminal connections. Replace any damaged or deteriorated wiring.
2. Check each blade for freedom of rotation and uniform tip clearance. They should also be inspected
for dirt and grain dust, especially inside the hub. Any additional weight can seriously affect the
balance and result in harmful vibrations and a short bearing life.
3. Check each blade for free play. Any side play is an indication of defective motor bearings, which
should be replaced to prevent a complete motor failure. Make sure motor mount bolts are tight.
4. Motor bearings should be lubricated periodically, depending on operating conditions. Under normal
usage it is desirable to have the motor cleaned, checked and bearings repacked by an authorized
service station every two to three seasons. If the unit is operated continuously through most of the
year, this service should be performed each year.
5. Remove and clean the gas line strainers. Make certain gas valves are closed and that gas is purged
from the system before attempting to disassemble anything.
6. Inspect the collector plate at the top of the burner casting and the burner cup for any accumulation
of foreign material and clean if required. Foreign material in the burner cup or casting will not burn
out and will impair burner operation.
7. If required, inspect the ignitor plugs and clean the electrodes. Use an ignition point file to remove
carbon and rust between the electrode surfaces. The ignitor gap should be about 1/4" (3 mm).
8. Inspect flame sensors for possible damage or poor connections. Flame sensor wires must be in
good condition.
9. Inspect and manually rotate the top auger paddle assembly. The paddle unit must rotate freely
without any indication of sticking or binding.
10. Inspect the top auger and bottom auger drive lines for proper adjustment and condition. Readjust line
tension as required.