1. The roller chains on the drive units should be periodically lubricated with a roller chain lubricant.
2. For motor lubrication, refer to motor manufacturer’s recommendations. See the tag attached to the motors.
3. The oil in all gearboxes should be changed once a year, and in severe operating conditions, more frequently. Use Para-Port Door Part No. 14090090 oil or Mobil #SHC 634. While the oil is drained from the larger gearbox, remove the inspection plate opposite the final output shaft and inspect the gears for cracks, missing teeth and excessive wear.
4. The cam roller bearings that ride on the guide rails and the main shaft support bearings that are at the ends of tube, should be greased at least every six (6) months.
5. The pulleys on the counterweight system, the hinges and toggles on the inside door seals, and the pins and rollers in the portable hold-downs and outside bump rolls, should be lubricated periodically.
6. On the doors using counterweights; the counterweight cables should be greased with a light coating at least every six (6) months.

1. It is recommended that after the door has been in use for a short time, that all nuts and bolts, retainer clips, set screws, etc., be checked and tightened if necessary.
2. The drive chains on the carriage should be properly adjusted at all times. 
3. Adjustments on hold-downs should be checked frequently to assure that the tube is held to the rubber sill as tight as possible.
4. The curtain material can be kept clean by using water and a mild detergent along with a soft brush or sponge.
5. All minor cuts and punctures in the curtain material should be patched immediately with Patch Kit No. 24090004 that was furnished with the door.
6. If cuts or punctures exceed two feet horizontally, consult the factory.

It is recommended that a yearly inspection program be set up with your maintenance crew for the inspection of your door and its components.

After any unusual conditions that the door is exposed to, such as severe winds, storms, etc., a thorough inspection should be made before attempting to operate the door.

                                                Some of the Major components are:

1. Drive Chains (Should be replaced every 5 years.)
2. Sprockets
3. Gearboxes - While the oil is drained from the larger gearbox, remove the inspection plate opposite the final output shaft and inspect the gears for cracks, missing teeth and excessive wear.
4. Keys on Shafts
5. Cam Rollers
6. Motor Couplings
7. Brakes on Motors
8. Counterweight Cables
9. Counterweight Pulleys and Brackets
10. Curtain (Check for deterioration.)
11. Tube
12. Guide Rails
13. Other Structural Components

CAUTION – When any signs of wear or distortion on any of the components appear, it is recommended that they be replaced immediately.