How do you grease a slew ring?
How do you grease a slew ring?
Apply a liberal shot of extreme-pressure grease to the fittings around the bearing’s circumference at intervals recommended in the operator’s manual. Purge with grease. Pump grease into the bearing until you see old grease squeeze past the seal. Purged grease can help carry any contaminants out of the bearing.
How often should you grease turntable on excavator?
The bearing should be lubricated at regular intervals, with a heavy-duty, extreme-pressure grease. Slowly rotating equipment or oscillating applications, such as backhoes, excavators, and cranes, should be relubricated about every 100 hours of operation.
What is an excavator slew ring?
The excavator slewing bearing device is composed of a turntable, a slewing bearing and a slewing mechanism, the outer ring of the slewing bearing is connect to turntable with high strength bolts (it divides three stages forcing the bolts pre-tightening), inner race with teeth and chassis connected by bolts, inner race …
Can you over grease an excavator?
However, using too much grease doesn’t help with lubrication — it makes a mess, attacts and traps abrasive materials (dust, sand, gravel) that can do as much damage as no grease at all, can also trap heat where it will cause an increase in wear-causing friction.
What is the best grease for an excavator?
We recommend using a NLGI #2 (Polyurea or multipurpose) grease. What does NLGI mean? NLGI stands for the National Lubricating Grease Institute and is the institution that certifies grease. Grease can range from NLGI #000 to NLGI #6, but the most common is NLGI #2 because it can be used for a wide temperature range.
How does an excavator turntable work?
On an excavator, rotary unions allow hydraulic fluid to be transferred between the cab and track base while continuously rotating 360 degrees. The fluid supplies the track drive system allowing the excavator to move.
How does a slew ring work?
A slew drive is a gearbox designed to handle radial or axial loads using high rotational torque. In addition, the slewing ring bearing, at the heart of the drive, enables it to withstand high overhung or moment loads. While turning, the worm gear’s axial movement transfers magnified torque force to the radial gear.
What is a ring bearing?
A slewing bearing or slew[ing] ring (also called a turntable bearing) is a rotational rolling-element bearing that typically supports a heavy but slow-turning or slowly-oscillating loads in combination (axial, radial and moment loads), often a horizontal platform such as a conventional crane, a swing yarder, or the …
What is slewing with an excavator?
Slewing refers to rotating the excavator’s house assembly. Unlike a conventional backhoe, the operator can slew the entire house and workgroup upon the undercarriage for spoil placement.
What’s the best way to grease ring bearing?
Apply a liberal shot of extreme-pressure grease to the fittings around the bearing’s circumference at intervals recommended in the operator’s manual. Purge with grease. Pump grease into the bearing until you see old grease squeeze past the seal.
How to avoid slewing ring failure with these six tips?
More than 96% of slewing ring failure could be avoided by following simple maintenance tips. Grease regularly. Apply a liberal shot of extreme-pressure grease to the fittings around the bearing’s circumference at intervals recommended in the operator’s manual. Purge with grease.
How to prevent slewing ring bearing failure with honor load charts?
Inspect the grease. Rub some of the purged grease between your thumb and forefinger. If you see or feel grit or metal chips in it, there may be a bearing problem. Honor load charts. Even slight overloads can dimple the bearing race.
