Swing bearing needs lube.

A drop in temperature may cause the slowdown in your excavator's upper structure when it turns (rotates) during construction operations.

But when it continues to move in an unusual way or at a snail's pace, the structure probably needs some lube--EL PRONTO!

The two grease fittings that lubricate the structure's swing bearing get overlooked. They're located directly under the access cover for the boom's hydraulic hoses.

Make sure you follow these steps before you grab the grease gun. You'll find them on Page 15-1 of TM 5-3805-280-10 for HYEX Type I and II. Type III's steps are on Page 15-1 of TM 5-3805-281-10.

* Park the excavator on level ground,

* Lower the bucket to the ground.

* Turn the auto idle switch off.

* Run the engine so the RPMs are one third the way up the RPM gauge, without a load, for two minutes.

* Lower the RPMs to the slow idle position.

* Turn the key switch to OFF, then remove the key.

* Make a tag that says DO NOT OPERATE and attach it to the right control lever inside the cab.

* Pull the pilot control shut-off lever to the locked position.

* Give the fittings 10 shots of grease. Do this during each scheduled service.

* Start the engine. Raise the excavator's bucket several inches off the ground. Then turn the upper structure 45[degrees] and back.