Engineered Air HVAC Unit DJS40/O/MV

Lubrication of Dodge Fan Bearings — Spherical Roller Bearing, Solid Pillow Block

Determine re-lubrication schedule based on shaft diameter and speed (RPM)

Is the unit operating 24 hours?

Lubricate with multipurpose roller bearing NLGI No. 2

Re-lubricate while running if safety permits

Adjust lubrication frequency based on purged grease condition

Lubricate bearings prior to extended shutdown or storage

Rotate shaft monthly to aid corrosion protection

Check set screws on fan wheel for looseness

Check set screws on fan bearings for looseness

Check set screws on fan pulleys for looseness

Check set screws on motor pulleys for looseness

Tighten set screws where required

De-energize the control system.

Close the upstream manual gas valve.

Connect a ¼” (6mm) tube to the outlet pressure tap on the safety shutoff valve.

Immerse the opposite end of the ¼” (6mm) tube vertically ½” (13mm) into a clear container of water.

Count the number of bubbles appearing during a 10 second period.

Is the bubble rate greater than that noted in the manufacturer's table?

If the bubble rate is greater than noted in the table, choose the action taken

If bubble rate is less than noted in the table, remove the ¼” (6mm) tube, reconnect the outlet pressure tap plug.

Check set screws for looseness on the shaft

Tighten set screws where required

Record any issues found during the check

Enter torque value for Dodge SC 203-215 series (3/4” shaft)

Enter torque value for Dodge SC 203-215 series (1”, 1 3/16”, 1 7/16” shaft)

Enter torque value for Dodge SC 203-215 series (1 11/16” through 2 15/16” shaft)

Refer to bearing manufacturers’ literature for other types of bearings

Is the bearing rotating slowly during lubrication?

Is a lithium base lubricant being used?

Are extended lubrication lines provided?

Enter the shaft diameter in inches

Enter the grease quantity used in ounces

Is the bearing temperature under 120°F (50°C) in a dusty environment?

Is the bearing temperature under 158°F (70°C) in a clean environment?