If you own a vehicle built in the last ten years; chances are it is equipped with serpentine belts. The older vehicles came equipped with V style belts. V-belts were thinner and thicker and depending on the style of V-belt most of them were ribbed on the bottom side.
After time V-belts would stretch and their tension would have to be tightened. Depending on the V-belt location on the front of the motor and what components they were driving; V-belts would have to be adjusted manually in different locations on the engine.
Honda Self Propelled Lawn Mower
Depending on the number of accessories the vehicle came with determined the number of belts needed to drive the accessories. If the vehicle had power steering and air conditioning then there could be up to four sets of V-belts.
When adjusting the tension of this style of belt; over tightening was common. Not only did it shorten the life of the belt but it added more stress to bushings and bearings inside the accessory components, thus shortening their life.
The advent of the Serpentine belt eliminated the number of belts on the front of the engine and also took the guess work out of the proper tension they need to run efficiently.
Serpentine belts are commonly wider and thinner with thin ribs running along the length of the belt. Most Serpentine belts are longer than the traditional V-belt; allowing this style of belt to drive more accessory components.
This style of belt does not require adjusting the tension due to the fact that there are tension pulley's located around the front of the engine.
These pulleys have a self contained heavy spring or a rubber bushing that keep constant tension on the belt. In turn less maintenance is required and cost to maintain this concept is less.
Still, there is maintenance that is required. The belt needs to be replaced every so often but not as often as the V-style belt. Tension Pulley's after time either lose their spring/rubber tension or the bearing that spins the pulley dries up.
In the past I have rescued several people who were broke down along the highway or interstate because the bearing on the tension pulley dried up, got hot and seized up. When this happens it usually shreds the Serpentine belt.
Since this belt drives the water pump, the engine can start to over heat if not shut down right away. It never fails; it's either hotter than the blazing sun or extremely cold outside when these pulley's decided to seize up. Either way you will be at the mercy of the outside elements until help arrives.
Here are some tips that will help prevent you from becoming stranded along side of the road due to either a broken Serpentine belt or seized up bearings in one of the tension pulleys.
• A Serpentine belt should last at least 50,000 miles if not more. When inspecting the belt, look at the thin ribs that run along the inside of the belt; if they are cracked it is time to replace the belt. Inspect the edges of the belt, look to see if the edges are frayed or torn. A torn edge will eventually wrap itself around the pulley and can cause major problems. Most vehicles today have two Serpentine belts. The longer belt drives the power steering pump, alternator and water pump. The shorter belt which is usually located toward the bottom of the engine and a little more difficult to see drives the air conditioning compressor. Refer to your owner's manual to be exactly sure on what configuration you have. There is a tag located on top of the grill inside the hood that shows the specific configuration and belt routing of your vehicle.
• Tension pulleys should last at least 75,000 miles if not more. If the self contained spring/rubber bushing is starting to get weak the pulley assembly will vibrate up and down at an excessive rate at an idle. Or the pulley assembly will not run true creating an abnormal wear pattern on the belt; the pulley assembly will need to be replaced at this time. If the bearings start to get dry inside usually you will hear a chirping sound coming from the engine. This is not always the case. A bearing can seize up without giving any warning signs before hand. To inspect the pulleys make sure the engine is off. Loosen the serpentine belt so there is no tension on the pulley. Manually spin the pulley; listen to the sound of the bearing carefully. The pulley should spin freely without any resistance. There should be no noise coming from the bearing. If the pulley sounds dry or rough then it is time to replace the tension pulley assembly.
It is a good idea to inspect the Serpentine belt during every service interval. All it requires is a visual inspection that involves very little time.
I try to inspect my tension pulleys and idler pulleys every 25,000 miles. Yes I said idler pulleys. Idler pulleys are stationary pulleys. They too have bearings inside of them that need to be inspected.
Again, refer to your owner's manual for the proper service interval. If you have your vehicle serviced at a local shop then it is a good idea to remind the service technician to inspect the pulleys.
For you do-it-yourselfers, Serpentine belts and tension pulleys are simple to replace. That tag located under the hood shows the proper routing for your Serpentine belts. The tension pulleys consist of two or more bolts that require removal. Usually it takes either a 15mm or 13mm wrench or socket to remove the bolts. Idler pulleys just have one bolt that needs to be removed. Be sure the belt is off before replacing the tension/idler pulleys.
I cannot express this enough but if you have any questions regarding your belts or pulleys; refer to your owners manual or contact your local shop to answer any of your questions. If all fails then ask me and I will direct you in the right direction.
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Husqvarna 7021P 21-Inch 160cc Honda GCV160 Gas Powered 3-N-1 Push Lawn Mower With High Rear Wheels (CARB Compliant) Feature
- 21-inch, gas-powered push lawn mower with 160cc Honda GVC160 engine, ideal for smaller yards
- 3-in-1 cutting system--mulch, rear bag, and side discharge
- 12-inch rear wheels increase maneuverability over a variety of terrain
- Adjustable handle for ergonomic operation; folds for storage
- 7021P is compliant for the state of California
Husqvarna 7021P 21-Inch 160cc Honda GCV160 Gas Powered 3-N-1 Push Lawn Mower With High Rear Wheels (CARB Compliant) Overview
Exceptional Products For Exceptional Yards. Great yards demand equipment that's as dedicated and hardworking as you. Fortunately, the Husqvarna range of lawn and garden equipment offers everything from lawnmowers and ride-on mowers to trimmers and chainsaws to let you master your great outdoors. You and Husqvarna - together we will make your yard the envy of the neighborhood. The Husqvarna 7021P is an efficient mower featuring a compact design making it easy to manuever in tight spaces, and three cutting systems, collection, mulch and side discharge. The handle folds for easy storage and transportation and double ball-bearing wheels ensure smooth operation and durability. The 7021P also offers 4-point, 9 position cutting height adjustment for varying lawn conditions. 2 Year Parts & Labor WarrantyHusqvarna 7021P 21-Inch 160cc Honda GCV160 Gas Powered 3-N-1 Push Lawn Mower With High Rear Wheels (CARB Compliant) Specifications
Loaded with innovative features not usually found in its class, the Husqvarna 7021P Lawn Mower combines value with reliable performance. Powered by a premium Honda engine, this easy-to-use three-in-one mower makes it easy to create and maintain a manicured yard, and it is durable enough to last season after season.
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 Complete with mulching, rear-bag, and side-discharge capabilities. View larger. |
 12" rear wheels provide maneuverability in a variety of terrains. View larger. |
Ideal for medium-duty, seasonal, or occasional use, the 7021P provides a 21-inch cutting width, 1.5- to 3.5-inch cutting height, six cutting height increments, and four-point cutting height adjustment. Its 21-inch steel deck, easy-starting 6.9-gross-torque Honda engine--ensuring smooth, efficient operation--and the combined versatility of the three-in-one mulch, bag, and side discharge cutting system means you can meet all your lawn-care needs with just one machine.
Great Maneuverability
Uneven terrain, bumps, and tight areas around trees and bushes are no problem with the 7021P. 12-inch rear wheels and double ball bearings keep things smooth and stable, even when the ground isn't.
User-Friendly Features
Designed to be user friendly, the 7021P includes a dust-resistant rear bagger that makes grass collection easy, as well as a handle with adjustable height for more comfortable pushing. The handle can also be folded down for quick and easy storage and portability.
The 7021P is backed by a two-year warranty.
Husqvarna: Exceptional Products for Exceptional Yards
Great yards demand equipment that is as dedicated and hardworking as you are. Fortunately, Husqvarna's range of garden equipment offers everything from lawnmowers and snow blowers to trimmers and chainsaws that let you master your slice of the great outdoors. With Husqvarna, it's easy to make your yard the envy of the neighborhood.
What's in the Box
7021P Lawn Mower and manual.
 The 7021P Lawn Mower has a foldable handle for simplified transport and storage. |
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