Question about Craftsman 17.5 hp 42 in. Deck Lawn Tractor - CA Model

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HOW TO ADJUST THE CUTTING BLADE TENSION OF THE MOWER BELT.

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There is no adjustment on the Craftsman mower belt tension. The tension is maintained by a spring. If the belt is to loose you either have the wrong belt or something is broken like a mandrel housing that holds the fixed pulleys in place.

Posted on Oct 25, 2010

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Posted on Jan 02, 2017

  • 85 Answers

SOURCE: riding mower

If the grass is very tall (more than 10") you will have to slow down to less than 1 mph, if you have a mulch kit on this unit, remove it to get the grass out as quickly as possible. Also, sharp blades & a level deck are important.

Posted on Sep 23, 2009

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SOURCE: How do I adjust blade drive belt tension on

Belt was excessively worn and after replacement and adjustments made all ran well. Thnaks.

Posted on Sep 03, 2009

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SOURCE: BLADE DRIVE BELT ADJUSTMENT

Well, most riding mowers have a "pully idler", meaning once you have the belt on there (and it is the RIGHT size), the idler automatically gives the belt tension when you engage it (in fact, the idler pully is what IS engaged when you engage the belly mower).

Couple things to check (super simple):

The Belt. Look to see if she is wore smooth out.
Sometimes....they WILL stretch on you, instead of busting/coming apart, and give you noise (when she is engaged, but wore out enough to flop around a little)

The Deck Blade Bearings. Straight away, that is what it sounds like, or bent blades.

Check your Blade Bearings (super simple):
1. Pick up your deck to the highest high setting (mower off, just sitting).
2. Reach under, and grab your mower blade (do this for both sides), and TILT your blade UP (meaning, don't LIFT the blade straight up).
Seriously, jiggle it at a TILT. If you feel some slack in the bearing, the bearing IS shot. Straight up and down is most of the time OK, IF it is VERY little play on your blade bearings. As you do it, look at your belt pulley directly on top, if you see that pully bobbing....

However, if you grab one side of the blade only, then tilt the blade up, and she moves.....
Bearings need replaced, both the upper AND lower bearings PER blade.

They are not hard to replace, and not expensive either! (Though unfortunately, most are "sealed" junk nowadays!)

Bad Bearings show up (make themselves known) in only a few ways: Tons of Noise (grinding, squealing) & Vibration.

Go check them thar Bearings!

Posted on May 28, 2009

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2 Answers

How to adjust tension on belt of John Deere Ride On D140


How to adjusted Cutting Deck Belt Tension

You do not say which size cutting deck you have. I will be writing about the 48", 3 blade cutting deck

The belt on this deck is self tensioned. The tension is provided by a spring attached to a moveable pulley on the deck. When the belt is in place you can manually force this pulley forward/backward and it will release the tension.

If the belt is off track, place the belt back around all the pulleys in the correct path, lastly force this spring loaded pulley forward/backward (depending on your deck, the direction is not important, the tension is) to get the belt around the pulley. If the belt is placed correctly, when you release the spring loaded pulley it will properly tension the belt.

Typically, these belts should not be jumping off. If yours is coming off frequently the belt may be worn. When they wear they get quite a bit longer, then the tension pulley cannot apply the correct tension. Rarely does the tension spring have to be replaced.

The other problem that causes belt jumping is worn spindles and stationary pulleys. The spindles are the most likely to need replacement. You can buy excellent replacements for JD spindles on Amazon for very reasonable prices. The following spindles are super replacement spindles for the 48" deck. They may very well be the same for smaller and larger decks; I have not researched that. Just search Amazon for Silver Streak # 285851.

Silver Streak # 285851 Spindle Assembly for JOHN DEERE GY21098, JOHN DEERE GY20962,

Product description:
Spindle Assembly / John Deere GY21098 Pack Size:1 JOHN DEERE GY21098, JOHN DEERE GY20962, JOHN DEERE GY20867, JOHN DEERE GY20454 OREGON 82-359, ROTARY 12910, ROTARY 11964 JOHN DEERE D100, D110, D130, D140,D150,D160, LA100, LA105, LA110, LA115, LA120, LA125, LA130,LA135, LA140, LA145, LA155, LA165, X110, X120, X140 Includes grease Zerk, pulley lock nut, blade lock nut, and washer , Height: 7 ", OD: 5 "

You can also find replacements for the flat pulleys on Amazon. If you cannot find what you need there, go to http://www.greenpartstore.com//


adjust-tension-belt-john-deere-ride-d140-1chhwwyjvhrciwi1l0smxmwl-3-1.jpg

Mar 08, 2015 | John Deere D140 48 in. 22 HP Front-Engine...

1 Answer

One of the blades will not cut in heavy grass and the tension on the pulley seems more slack than the blade that will cut


Sounds as if the deck belt is stretched. Replace the belt and make sure it is routed correctly. When the belt is off of the unit, make sure each blade assembly rotates without resistance. One of the mandrel assemblies could be seized.

Sep 22, 2014 | Husqvarna Garden

1 Answer

Blades keep running in all gears on my mtd 420/38


Assuming you have put the blade drive lever into 'disengage' check the blade drive belt tension. With blade disengaged, belt should have significant slack. You may need to adjust the control cable, adjustment is usually on the mower deck; or you may have some debris on the deck preventing the pully to release belt tension

Jun 26, 2014 | Garden

1 Answer

Ignition/no spark on ford GT85 riding mower with a kohler M18QS gas engine. I need the electrical schematics for diagnostics.


follow this steps and fix it. GOD BLESS YOU
If grass is poorly or unevenly cut, try mowing at a slower speed and adjusting the engine speed with instructions in your owner's manual. Scrape away any dried grass and other debris caked under the mower deck. Sharpen or replace dull or bent blades 0fbc95da-10ce-4268-a804-bcc52ffe7dcf.jpg. Check and replace a worn belt.
If the V-belt slips or comes off during use, clear any debris in the belt area, adjust the drive-belt tension (see below), or have the belt replaced. Adjust and tighten pulley fasteners or have a service center replace worn parts.
If the belt squeals or wears excessively, adjust the drive-belt tension (see below) and look for obstructions around the belt. If that doesn't work, take the mower in for professional service.
If the mower vibrates excessively when the clutch is engaged, scrape away any debris accumulated under the deck. Balance the blade and replace the blade if needed. If that fails, adjust drive-belt tension (see below). If you find that the drive belt, pulley, or other belt-drive part is damaged, consider having it replaced by a professional.
If the mower is hard to shift or doesn't move when the clutch is engaged, adjust the drive-belt tension (see below). Also make sure the mower is lubricated according to the owner's manual specifications. As needed, have the mower serviced for damaged or maladjusted clutch/brake pedal linkage.
If the engine doesn't start, loses power, or dies during use.
Replace a recoil starter rope:
  1. Disconnect the spark plug cable for safety.
  2. Disengage the throttle cable from the housing and remove the housing as needed to access the starter.
  3. Remove the handle from the rope, which is often held in place by a knot or retainer pin.
  4. Unfasten the other end of the rope from the starter using pliers or a cutter as needed.
  5. Knot the end of the replacement rope.
  6. Tighten the pulley counterclockwise all the way, then back it off two turns and hold it firmly.
  7. Thread the unknotted rope end through the pulley hole.
  8. Thread the rope through the housing hole and pull it taut.
  9. Slowly release the pulley, allowing the rope to wind around the pulley.
  10. Attach the handle and reassemble as needed.
  11. Reconnect the spark plug cable.
Replace a recoil starter spring:
  1. Disconnect the spark plug cable for safety.
  2. Remove the housing and the spring cover.
  3. Carefully remove the rope from the pulley to release spring tension.
  4. Remove and replace the spring as recommended by the manufacturer.
  5. Reinstall the pulley, rope, and housing following the instructions above.
  6. Reconnect the spark plug cable.

Nov 12, 2013 | Garden

1 Answer

How do I change the drive belt on a 7021r mower? The drive will move the mower on pavement but not on the grass


First, you need to make sure you have the right tools for the job. You'll need a wrench, work gloves, mower blade clamp, drain pan and fresh fuel. Check your owner's manual for the correct belt to your specific lawn mower. Belts that are not specifically designed for your mower will not fit properly and may wear down prematurely. Next, remove the spark plug wire. This is a safety precaution to prevent the mower from accidentally starting.
Now you can remove the screws that secure the drive cover to the mower deck. Once you've taken off the drive cover, loosen the screw that holds the belt tension spring to the transmission. As the screw is loosened, tension on the belt is released allowing you to remove the belt off of the front transmission pulley.
At this point you'll need to turn your mower on its side to take off the mower blade. Be sure to use a work glove to protect your hand when removing the mower blade. You can use a lawn mower blade clamp over the blade to secure it. Unscrew the bolt to remove the blade and then the engine baffle. Once the pulley unit is exposed, you can remove the entire drive belt. Insert the new drive belt and place one end on the rear pulley and re-attach the engine baffle. Then, place the mower blade back (making sure it's facing the correct way with bottom of the blade facing the ground) and tighten the bolt. Remove the clamp and return the mower to its upright position so you can place the other end of the belt to the front pulley. Remember to tighten the screw to the tension spring.
Put the front drive cover back on, tighten the screw that secures the cover to the deck and reconnect the spark plug wire. Add new fuel to your mower and you're done!

May 14, 2011 | Husqvarna 7021 21Inch 160cc Honda GCV Gas...

1 Answer

The belt that drives the blades for cutting has broken and I need to replace it. I have a Craftsman LTX1000 lawn tractor and I've misplaced the manual. The belt is 96" long. Not sure where to...


With the mower off.
Look on top of the deck.Find the pulleys for the blades then find the engine pulley.There should be one more pulley that is the tension pulley.Watch that pulley as you pull the engage blade lever,while still turned off.The belt will go on the blade pulleys,and the engine pulley,it needs the tension pulley to push it tight.So you need to make sure it goes on the inside of the tension pulley.If you get the belt on and it does not engage,just remove it and replace it on the opposite side of the tension pulley.

May 12, 2011 | Craftsman 42 in. Precision Cut Plus 24hp...

2 Answers

I have a John Deere LA150 that will not go steep


I have the same problem same year, same model. I changed the drive belt and it still won't go up steep hills that it used to easily climb. I don't see any way to adjust tension and it doesn't cover that in the operator's manual. What did you find out with yours?

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1 Answer

Install belt on toro mower model 70041


For removing/replacing the deck belt, the general method is:
  1. turn off engine, remove key and set parking brake
  2. disengage blade by putting blade engage lever into off (disengaged) position
  3. lower the cutting deck to the lowest position (closest to the ground)
  4. relieve the belt tension (depending on the model, use a 3/8 inch ratchet set to tighten in the square hole of the idler bracket)
  5. remove and replace the belt
NOTE: it's not necessary to completely remove the cutting deck.

Useful diagrams for removing the cutting deck, http://216.213.143.2/ProAuthor/ManProc.cfm?ManualID=425&ProcID=14794

For deck belt diagrams, http://216.213.143.2/ProAuthor/ManProc.cfm?ManualID=425&ProcID=14796

If the transmission drive belt needs to be replaced, several components must be removed and special tools (i.e. air/impact wrench) used in order to change the tractor's transmission drive belt. See an Authorized Toro Service Dealer to have your drive belt replaced.

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4 Answers

G-110 deck belt keeps jumping off pulleys


check for a broken belt tension er or maybe grass clippings under belt area, check for a broken or loose pulley bearing, even a bent shaft on the deck.

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