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

1 Answer

BELT ADJUSTMENT How do I adjust the tension on the v-belt the drives the blades? It works, but makes a horrible noise and vibration. The mower is a : CRAFTSMAN 17.5 hp 42" Mower MODEL: 917.275371

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  • D in Montana May 28, 2009

    Thank you for your answer about my Craftsman mower. I did NOT notice any smell at all, however I was moving thru some loose top soil prior to the belt actually coming off the drive system. I cleaned out the dirt and small limbs from under the deck and that is when it started making the noise and vibration. Is there an adjustment on the cable that connects the drive system to the shift handle on the dash?

  • D in Montana May 28, 2009

    Okay, thanks again. It sounds like I need someone who knows much more than I do to fix the beast. It still mows, but just makes a bunch of noise. I hope it is okay to continue using it for a while until I can get it into a service center. I live way up in the Montana Rocky Mtns and am about 75 miles from the nearest city.

    THANKS AGAIN, Dwight

  • D in Montana May 28, 2009

    Well, I finally figured out the problem....
    It seems that the blades must have loosened up on the shafts and stripped the star fitting on the end of the shaft. I think they are called "Mandrels". Both sides are clean and the blades are free turning on the shafts. How big a project is it to replace the Mandrels? I really can't afford to take it to a shop to have it done. Any help would be most appreciated. Dwight in Lincoln, MT

  • D in Montana May 29, 2009

    Thanks for all of your help. I am waiting for the parts to arrive. Considering where I live, it will take some time for them to get up here. I think the post office still using horse drawn wagons to bring mail up here. In any case, I might be checking back with you when I start replacing the worn out parts.

    You have been a BIG HELP.......Thanks again!!!!!!

    Dwight in Montana

  • Anonymous Mar 22, 2014

    How do I adjust the tension on the belt?

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  • 153 Answers

There is an idler pulley near the drive pulley under the engine. It is made of plastic and is a common failure. It freezes up and doesn't want to let the belt move. Have you noticed the smell of hot/burning plastic? You can replace it with an original, but it is still plastic. Metal replacements can be had. I think I got some from mcmaster.com so try there. They are a great resource. Shipping is fast and inexpensive and they have everything a guy could want.

Posted on May 28, 2009

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  • rjivaro May 28, 2009

    I still think you should check that idler pulley. With no belt tension on it, it should spin freely.

    Considering how the problem started, I seriously doubt the answer involves adjusting belt tension. It is more likely to involve debris on top of the deck (under the cover), improper belt routing, stuck idler wheels (under the engine or under the cover on the deck), fried bearings on the blade spindles or something like that.


  • rjivaro May 29, 2009

    Well now. It gets more interesting all the time, eh?
    You can get the parts at sears.com, then to change it, you need to remove the assembly from the deck, requiring a removal of the cover, then the belt, then probably 3 hex head bolts (liquid wrench is your friend). You can then remove the spindle assembly which will also require disassembly. You should also check the condition of the bearings (do they allow wobble?) and replace them if they are damaged or sloppy. Be sure to re-lube all bearings on the deck before re-assembly, and while you are using your grease gun, using the manual or your eyes, find and lube all points with grease fittings or wear points before you put the machine back in service.


  • rjivaro May 29, 2009

    You are certainly welcome. I will be glad to help you through the process.

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Zt2560


Remove blade drive belt. turn each blade by hand. Sounds as if you have bearing problems. Each spindle has an upper and lower bearing of the same size. They are notorious for going out! You can get them at most any auto parts store. Also check the tensioner pulley bearing. They go out quite often. As for the jerking, make sure the two drive disengage rods are fully in. Check tension on drive belt and belt. These belts get worn quickly. Be sure to blow the trash and dirt from your mower after each use. Especially the Hydraulic motors and the mower deck. This will save you lots of trouble. If you wash the mower, be sure and run the blades and Hrdroes to get water dried from bearings and pulleys and belts.

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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

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How to adjust a loose mower deck drive belt?


check your pulleys to make sure they haven't split as this does happen. Adjust the belt tensioner to tighten the belt when you engage the clutch to drive the mower. You should be able to see the belt tensioner by dropping the cutting deck to its lowest point and looking underneath the mower to see which pulley actually puts the tension on the belt to make it drive. there is no need to start the mower to find which pulley needs to be adjusted, it should be obvious when you look at the belt and the pulleys.
Hope this helps you

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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.

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1 Answer

Blade stops rotating under load Honda HRU216M1 (Aust)


sounds like you smoked a belt check your blade tensioner belt, possibly an idler pulley bearing or your belt jumped off pulley, not getting right tension on belt for blade

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1 Answer

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


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.

Oct 10, 2010 | Craftsman 17.5 hp 42 in. Deck Lawn Tractor...

1 Answer

Cable to engage the self propelled pully came loose. How do i reattach it?


Hi,
Instructions
Step 1 Locate the spark plug wire, and disconnect it from the spark plug.
Step 2 Remove the screw that is used to secure the belt cover to the mower with a screwdriver. Take the belt cover off of the mower.
Step 3 Loosen the belt tension bolt with the socket wrench. The belt tension bolt is located next to the wheel adjustment lever on the left front of the mower.
Step 4 Pull the front part of the drive belt off of the transmission pulley that is located on top of the motor.
Step 5 Tilt the mower on its side, and pull the rear part of the drive belt over the mower blade.
Step 6 Insert the rear of the new drive belt over the mower blade, and place the front of the belt over the transmission pulley.
Step 7 Tighten the belt tension bolt with the socket wrench.
Step 8 Locate the adjuster nut located on the underside of the mower near the belt tension bolt.
Step 9 Tighten the nut with the wrench until it touches the spacer, and slightly loosen the nut so that the spacer can turn.
Step 10 Set the belt cover back onto the mower, and secure it with the screw.
Step 11 Re-connect the spark plug wire to the spark plug.
Good Luck!

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1 Answer

Craftsman lawntractor model # 917273121


There is no tension adjustment it has an idler pulley working off from a spring. Check to make sure that the spring did not come off or break. If neither of these have happened then the belt is stretched and you need to purchase a new one.

Apr 12, 2010 | Craftsman 17.5 hp 42 in. Deck Lawn Tractor...

1 Answer

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!

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1 Answer

Drive belt slips on lawn tractor, cannot see an adjustment.


hi,

i would check with the owners manual to see if it shows an adjustment for the belt drive. most mowers today are equipped with a self adjusting arm witha pulley tensioner with a spring attatched to it. as the belt stretches the tensioner spring pulls against the arm causing it to apply tension to the belt thus tightening it. it sounds as if your belt is stretched beyond the limits of the tensioner. at least every new season it would be a good idea to inspect the belt tensioner for room or space of free play. that is to check to see if it will move opposite the pulley allowing the belt to tighten. if there is not enough sufficient room then i suggest replacement of the drive belt.

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