Engine Bearings

Defender caster bearings- How to abolish and check

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Workshop session with Footloose 4×4, removing and replacing front and rear wheel bearings. We also clean up our rear brake drums.

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Tags: abolish, Bearings, caster, Defender
January 20th, 2012  |  Posted in Engine Bearings  |  Comments Off

Sailboat Winch Maintenance

Author: admin

Sailboat Winch Maintenance is Greasy and Messy

If you’re like most sailboat owners, you haven’t serviced your winches since you owned the boat. Every year you say this is going to be the year you clean and grease the winches, but something more important always comes along.

Servicing sailboat winches is a greasy, messy job that intimidates even the most boat-savvy person. However, winches need to be greased because they are among the most expensive items on the sailboat!

The Sailboat Winch Jigsaw

Every winch is different, so there’s no good way to memorize how a winch goes back together. However, a sailboat winch can not be put together wrong because the parts only fit together the right way – with the exception of maybe getting a washer in the wrong place.

Before you start with Servicing a Sailboat Winch

It’s a good idea to have everything handy before you begin because you’ll be too greasy to dig around your clean boat for needed items: plenty of paper towels, mineral spirits, small can to wash greasy parts in, small paint brush, winch grease, tools including metric Allen wrenches and access to hot water.

The paper towels let you keep sailboat winch dissassembly mess under control. Pour the mineral spirits into the small can and use to clean parts with the small paintbrush (after cleaning, rinse all the parts in hot water).

Disassembly of Sailboat Winch

To disassemble, remove the drum from the base of the winch using the screw at the bottom of the winch handle socket. Simply unscrew it, pull the socket out, and the drum will lift off.

As you lift the drum, be aware the winch roller bearing cages may momentarily stick inside the drum and could unexpectedly drop out. Make sure they don’t bounce off the deck into the water.

Now you can remove all the winch gears and bearings for cleaning. Even though the sailboat winch only goes back together one way, it won’t hurt to take a good look at everything.

Most importantly, remember where the washers and other little items go in the winch. It’s hard to figure out their location. Don’t waste time worrying about the larger winch gears and drive shaft. It’s easy to find their homes.

Pulling the gears and bearings out is actually quite simple and doesn’t require any sailboat winch tools or skill. They just slip over the gear shaft.

Cleaning the Sailboat Winch Components

Place gears and bearings in the small can. Add the mineral spirits to the can and allow to soak.

Take the gears and bearings and place them in a small can. Cover the parts with mineral spirits and soak.

After soaking, take the small brush and work off any old grease from the winch component. Don’t forget to clean the winch gear ring on the inside of the drum.

Now that you’ve removed the grease and grime, rinse the parts in hot water to remove the mineral spirits. If the spirits are left on, it breaks down the grease.

Dry the parts with a clean rag or paper towel.

Reassembly of Sailboat Winch

As you put the gears back into place, take a close look at how the pawls are working. If they don’t open and close smoothly, then the drum could spin backwards.

If there’s any question that the pawls are not working properly, it is much easier to replace them and the little springs. It is very important NOT to grease the pawls because grease causes them to stick. And if they stick, the gears won’t engage. To lubricate your pawls, use any light oil that might be on hand; something like a 3 & 1 oil.

The final step is to place all the sailboat winch parts back into the base where they belong. If you do end up with extra parts, you’ll have to go back through each part and play detective until its home is discovered.

Also, it’s not a bad idea to periodically give the shaft and gears a spin to make sure you are on the right path.

Remember, in most cases sailboat winches are used in pairs. Clean one winch at a time. If you become confused as to where a part goes, you can look at its mate for the answer.

Final Touches to the Winch

Lightly brush on clean winch grease. Do not overpack.

Once you are certain the sailboat winch is reassembled correctly, lightly brush on some clean winch grease. Some owners think that because they won’t get around to servicing their winches for a long time, the smart strategy is to pack them with so much grease they will last for years. This is a bad idea and only makes a big mess down the road.

Now that the gears and bearings are all in place with new grease, all that needs to be done is to remount the drum.

A video of this procedure is available in the articles section of Sailboat Winch or click here http://www.sailboat-winch.com

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Tags: Finepix, Fujifilm, Maintenance, Sailboat, sample
January 8th, 2012  |  Posted in Engine Bearings  |  Comments Off

Unsprung Mass

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If you don’t know what Unsprung Mass is, don’t worry – that’s what this article’s about. If you want to talk basics, the whole wheel/tire/brake system is called the Unsrpung Mass of the vehicle that you’re driving. The things that are supported by the suspension like the engine and the passengers are known as the sprung mass. The components of the unsprung mass include the axles, wheel hubs, wheel bearings, tires, and even the suspension links. If one of your vehicle’s brakes are mounted within/inside the wheel, their weight is also part of the unsprung weight. If you ever happen to notice, the Unsrpung Mass has an effect on your car’s acceleration and deceleration. The heavier your wheel is, the slower you go; it’s as simple as that.

So let us go over some physics: when the unsprung mass is higher, there’s more force on the sprung mass and therefore, your ride isn’t that comfortable. If there’s a high force applied to the spring of the suspension, that means that there is more pressure on the wheel to stay on the road; which means it affects the handling of your vehicle. That same force is also reacted by the actual body of the car. When this happens, the passenger of the vehicle feels that force, too. When the force is higher, that means that the ride is less comfortable.

Let’s say that you’re going through a parking lot and there’s those annoying bumps on the ground so you go “speed limit”. When you hit those bumps, you want your Factory 2008 Lincoln MKZ Rims and tires to move over the bumps as lightly as possible. When the wheel is lighter, the lower the forces involved. When you come across any bump or any imperfection in the road, you’ll notice that these cause tire compression – which means that it induces force on the unsprung weight. Within some time, the unsprung weight will then respond to this specific force with its own movement. When you have a lighter Factory Wheel on your car, it readily moves in response to the road bumps, that you annoyingly hit, with more grip when tracking over a road that’s imperfect. Because of this, lighter wheels are preferred on high-performance cars. If you have a heavier wheel on your vehicle, like an OEM Steel Rim, it won’t absorb as much vibration. When it hits the imperfections of the road, the unevenness will transfer to where the passengers are sitting and hence; cause an uncomfortable ride.

The Unsprung weight is a huge part of the vehicle’s suspension design AND a big part in the construction of the components that make up the suspension. When there’s beam axle suspensions installed on the vehicle, they usually have a heavier unsprung weight than your ordinary independent suspension systems; where the wheels are both suspended and allowed to move separately. There some heavy components, like the differential, that can be made part of the sprung weight by attaching them straight to the body. When there are light weight materials like plastic, carbon fiber, or even aluminum (like those 2004 Lincoln Aviator Wheels) these can supply further weight reductions at the charge of greater cost.

I guess you can say that that’s all there is to it.. if you get how the Unsprung Mass works.

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January 2nd, 2012  |  Posted in Engine Bearings  |  Comments Off

Listening to address noise

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Quite often you can hear bearing noise on a test drive, but when you lift the vehicle and take the load off the wheels the noise goes away. If it’s a real noise it’s most likely still there but it’s just not amplified with the load. Using a listening device makes it pretty clear where the noise is.

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December 30th, 2011  |  Posted in Engine Bearings  |  Comments Off