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Why won't blade engage when engaging the PTO switch

Clutch for engaging the blades will not activate when pulling out the PTO switch

Posted by Anonymous on

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6ya6ya
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Posted on Jan 02, 2017

  • 376 Answers

SOURCE: Blades won't engage. OK-I need a pto clutch

A switch should only be about $25. Before you spring for a new PTO assembly, take your switch out and take it to a shop and have it tested. I may just be a bad switch. Don't bother taking it to Sears though. Take it to a shop that works on Husqvarna and/or Poulan Pro. (Both basically same as Craftsman). DO take the model number from under the seat with you.

Posted on Jun 24, 2009

mowerman1857
  • 389 Answers

SOURCE: PTO will not engage blades on riding mower. The

Using a test light or volt meter, check to see if you are getting a full 12 volts at the connector where the PTO plugs in. If no voltage present, locate the fuse for the PTO and check it, also check the PTO switch to see if it is working. You can turn on the ignition switch to the run position, don't start the engine, and turn the PTO switch on and off several times listening for a clicking sound. If you hear it clicking, have someone sit in the seat and start up the engine, while it is running, observe the PTO clutch and see if it spins when turned on and if the belt turns with it. If none of this works, post a follow up and include your Craftsman Model number. I will look it up and see if I can find anything else we might be missing

Posted on Sep 21, 2009

  • 394 Answers

SOURCE: DTY 4000 tractor dies when engaging pto, new

Hi,
This is just a suggestion. Try pulling the choke out about one third to one half and then engage the PTO. Sometimes the air idle adjust screw port gets a tiny speck of debris in it. If with the choke partially out and the PTO engages the just grab a screwdriver and turn the air idle mixture screw counter clockwise a hair.

Posted on Apr 30, 2010

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ginko
  • 19396 Answers

SOURCE: Honda harmony 1011 - hydrostatic

Hi.

Idler pulley and PTO pulley heights cannot be adjusted. The two pulleys look slightly off level, that is normal. If the belts have rolled out, then they must be replaced. If a belt rolls out even once, then replacement is needed. That is likely the problem.

Replace the belt with an original one. OEM replacements may give more problems. Use the contact on the user manual to get parts.

To replace belt and put the belt in tension, see instructions from page 83 of this user manual.

Regards.

Ginko

Posted on May 30, 2011

  • 2239 Answers

SOURCE: why won't my pto engage?

They are normally electro magnetic clutches, the click is the cluch engaging so i would guess it is working, arev you sure the belt is not broken or lose?

Posted on Feb 13, 2012

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Mowers shuts off when I engage the pto switch, I jumped all of the safety switches,put new pto switch on, belt and pulleys are fine! Please help


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Troy Bilt 33" walk behind mower blades won't turn on.


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Most Frequent Causes for Lawn mower blades won't engage. See All Lawn Mower Parts for model 13AP60TP766. Cause 1 PTO Clutch. If the blades don't rotate the electric PTO clutch might not be engaging. ... Lawn mower wheels don't turn ...

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1 Answer

Blades won't engage after got stuck in mud electronic pull on blade engagement


Blades would not turn after I got stuck in mud. Electric clutch.

  • Turn the engine off and remove the key.
  • Check for physical damage; anything look bent?
  • Is the deck belt intact?
  • Spin the pulley on the bottom of the clutch. Does it spin freely?
  • There could be mud or grit stuck in the clutch.
  • There is a drive key between the clutch and the shaft. Has this key been sheared?
  • When you pull the PTO switch does the clutch make a "click"? It's possible the clutch was burnt out during the mud incidence.
PTO Clutch will not engage or stay engaged.
There is a very fine discussion on evaluating electric clutches at this site:
http://www.messicks.com/Articles/FixingElectricClutch.aspx

My JD tech manual, which covers the entire LA 100 series, agrees with the electrical specifications. It states that the Electric PTO Clutch should show the following:
  • Resistance 3.7 ohms
  • Current Draw 3.25 amps.
  • It does not give the air gap.
It does include a note to check the PTO Clutch Key for damage or if missing. So there is a drive key between the PTO Clutch and the shaft. Additionally, it recommends checking the tightness of the cap screw. That's the screw or bolt that holds the clutch on the shaft.
  • Cap Screw torque 55 lb-ft (75 N.m).
Fixing Electric Clutches

Apr 10, 2015 | Garden

1 Answer

What causes fuse to blow every time I try to engage blades?


To engage the blades is it a knob to an electric switch that you pull?
If so does the wire from the switch activate a electric clutch?
Is the wire damaged and shorted to the frame, is the clutch shorted. If you provide the brand name and model number I might be able to find a schematic for your mower.

Video shows an electric clutch but yours may be different but this should give you an idea of where to look. Riding Mower Electric PTO Clutch Won Engage When Hot Problem Fix

Oct 02, 2014 | Garden

1 Answer

On john deere la150, if i sit on seat and engage blades,,,nothing, but when i lift of seat, blades engage and motor shuts off. Replaced seat switch and did not fix problem


"On john deere la150, if i sit on seat and engage blades,,,nothing, but when i lift of seat, blades engage and motor shuts off. Replaced seat switch and did not fix problem" Okay, what I'm hearing is that "nothing" means the blades-driving PTO won't engage (declutch) when you switch on mower; but then, (say) as you start to dismount the mower (seat) the mower (drive clutch) engages even as the deadman switch (seat switch) kills the engine (and the drive/pto shaft starts to slow down. The key here seems to be that at full engine torque the clutch is unable to remain engaged but, rather, slips so that mower blade inertia (resistence) cannot be overcome...but as engine/pto rotation slows the clutch is able not to slip. First place to consider is the clutch gap which is probably to0 large (possibly from wear and tear, possibly not). So check specs and how-to from manual or factory and reset the pto drive clutch gap...not hard to do. If clutch gap is not the problem then most likely rehab or replacement of the clutch assy will be needed...is the mower has many years use sufficient to wear out the clutch. Another possiblity is an electic (wring/switching/grounding) problem involving mower and deadman switches.

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2 Answers

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You need to check the wires from the clutch, with the ignition on pull the pto switch out there should be a 12 volt supply at the wires if not replace the pto switch, if you have 12 volts then it is the clutch itself, they are not realy repairable, so may need a replacment.

Jul 16, 2013 | Garden

1 Answer

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first look for a blown fuse the old clutch may have burn it out the check to see if a safety switch burned out

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1 Answer

WHEN I PULL THE BLADE ENGAGEMENT BUTTON, THE BLADES DO NOT ENGAGE.


Check the connector at the switch that engages the blades (PTO switch). Pull it off, make sure the pins are clean, and replug it firmly. Do the same at the connector at the PTO clutch, which is mounted on the engine pulley. Look for a broken wire at the same time.
It's very possible the PTO switch itself could be bad. It can be tested with an ohmmeter if you understand the internal operation. If not, just remove it and take it to Sears to get a replacement.

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Blades won't engage when the engage knob is pulled


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