RC ENGINE BEARING MAINTENANCE INSTALLATION

RC ENGINE BEARING MAINTENANCE & INSTALLATION

 

 

BOCA'S ECONO-POWER BEARING INSTALLATION GUIDE

 

FRONT BEARING:  For all RC applications, surface, water, and air, it is recommended that one of the shields be removed and that the bearing be installed with the shielded side facing the outside of the engine. For Boca Bearing's rubber-sealed engine bearings, however, it is recommended that you leave both seals on. The bearing is already filled with grease, so it does not need fuel to lubricate it. This also allows more fuel to get to the rear bearing and to help stop leakage through the front bearing.

 

REAR BEARING:  For RC aircraft applications, particularly four-stroke engines, maximum lubrication for all internal components is critical. It is recommended to remove both shields from the rear (large) bearing. For surface RC applications, contamination is more of a concern, and removing one shield will allow the fuel/lubricant to flow through the bearing. Either method is acceptable; it's really a matter of preference. If one shield is left in place, the bearing should be installed with the open part of the bearing facing the rear of the engine.

 

BOCA'S HIGH SPEED BEARING INSTALLATION GUIDE

 

FRONT BEARING:  Some of Boca's High Speed, High Heat front bearings are supplied with one shield. It is not necessary to remove this shield. The bearing should be installed with the shield facing toward the front of the engine. Please note that the shield is the metal/silver ring located on the side of the bearing. For Boca Bearing's rubber-sealed engine bearings, however, it is recommended that you leave both seals on. The bearing is already filled with grease, so it does not need fuel to lubricate it. This also allows more fuel to get to the rear bearing and to help stop leakage through the front bearing.

 

 

REAR BEARING: Some of Boca's High Speed, High Heat rear bearings are supplied with one shield. For RC aircraft applications, particularly four-stroke engines, maximum lubrication for all internal components is critical. It is recommended to remove both shields from the rear (large) bearing. 

For surface RC applications, contamination is more of a concern, and leaving one shield in place is recommended. The bearing should be installed with the open part of the bearing facing toward the rear of the engine.

CERAMIC BEARING CAUTION

 

Because ceramic is so much harder than steel we always suggest that you leave one seal or shield on and face it towards the inside of the engine. This will protect your engine if it comes under any excessive side load that may result in the ball being ejected from the retainer.

 

 

TIPS FOR REMOVING SHIELDS & SEALS

REMOVING SHIELDS (C-CLIP)

Move an awl or dental tool around the inside of the outer race to locate the end of the c-clip.

Pry up one end of the c-clip.

Completely remove c-clip.

Wedge your tool against the edge of the remaining shield.

Completely remove shield.

REMOVING SHEILDS (FIXED)

Using an awl or dental tool gently pierce a small hole into the shield as far toward the outer diameter as possible.

Place bearing on flat surface.

Insert tool into puncture hole.

Slowly pry shield from bearing.

Completely remove shield.

REMOVING SEALS
 

Using an awl or dental tool locate the inside edge of the outer race.

Gently wedge the tool under the edge of the seal.

Completely remove seals.