Question About engaging PTO

[RoyJackson]

Thanks for the reply. I don't think it is normal to hear metal slamming against metal as loud as a high power rifle. With the help of the forum, I think I may have a solution. The blades are tight and disengaging the PTO leaves the blades extended. When I engage the PTO the inertia of the blades cause them to slam back into the pivot bolts. If the blades were not so tight, I think they would swing forward when I disengage the PTO. I have moved the blades forward and I don't have the loud bang when engaging the PTO. The blades swing out and not back into the bolts.

No, the blades will not swing back into the bolts (inertia...centrifugal force as it's better known by) when the PTO is disengaged. Now, when first engaging the PTO, those blades will hit the stops...pretty loud too, BTW

 

[SPYDERLK]

In the section on assembly: Start by assembling blades without shim (#2). Insert blade bolt (#1) through blade (#3), dish pan (#4) and
flat washer (#5). Temporary secure blade with a used 1 1/8"-12 nut. Draw nut up snug. Do not tighten.

Check blade deflection. If deflection is greater than3/4", remove blade bolt and reassemble as before except include shim (#2) in the assembly. Select shim thickness based on deflection. The greater the deflection, the thicker the shim.

Once blade deflection is correct, replace used nut with new locknut (#6) and torque to 450 ft-lbs.

I cant post pictures,but it seems "possible" this was not assembled djusted properly, just a thought.

I would worry about that torque number in the manual. A 1-1/8 fastener should be considered loose at 450ft#. That size in Gr8 is speced for 1450 on the 7tpi coarse thread. Around 1550 for fine thread.
larry

 

[TripleR]

I would worry about that torque number in the manual. A 1-1/8 fastener should be considered loose at 450ft#. That size in Gr8 is speced for 1450 on the 7tpi coarse thread. Around 1550 for fine thread.
larry

If the manual is wrong where would you find the proper torque?

 

[Bluegill2]

So it sounds to me, when you hit the pto switch, it's like popping the pto clutch on an old school tractor? Instant engage. Sounds bad to me. If this is one of the 'bells & whistles' on the Grand L's, then no thank you...

 

[Bluegill2]

I would worry about that torque number in the manual. A 1-1/8 fastener should be considered loose at 450ft#. That size in Gr8 is speced for 1450 on the 7tpi coarse thread. Around 1550 for fine thread.
larry

Those particular bolts do not need that kind of torque!

 

[TripleR]

So it sounds to me, when you hit the pto switch, it's like popping the pto clutch on an old school tractor? Instant engage. Sounds bad to me. If this is one of the 'bells & whistles' on the Grand L's, then no thank you...

Not quite and it has been used by other brands for years, it is on our John Deeres as well. As I have mentioned, I have the same setup on mine and while I still prefer the lever engagement, it has been trouble free.

 

[Bluegill2]

I use the clutch with some of my other tractors but depressing the clutch on the 3240 does not disengage the PTO. I assume it would not help when engaging but I have not tried.

I'm still having a problem with the above statement. Try clutching the tractor when you engage the PTO and let us know what happens.

 

[vrmnthntr]

My landpride 1872 makes the same noise when engaging without using the clutch.

 

[SPYDERLK]

If the manual is wrong where would you find the proper torque?

I have a little book that I refer to. There are various charts on the internet tho. Heres one:
Google Image Result for http://www.repairengineering.com/image-files/bolt-torque-chart-2.jpg
Whether the manual is wrong is a suspect issue. I have had the 1" fine thread knife bolt locknuts on the JD127 bushog work loose if tightened to 600ft#. That is wear from movement of the bolt shoulder within the carrier socket. Tightening them to 1000ft# allows you to forget about em - and the carrier doesnt degrade by wear.
larry

 

[SPYDERLK]

Those particular bolts do not need that kind of torque!

.. Why?

 

[Bluegill2]

.. Why?

I've been running bush hogs 30 years and never tighten one that tight. Never had one work loose. This with different brands and sizes.

 

[Bluegill2]

My landpride 1872 makes the same noise when engaging without using the clutch.

Right! I'm thinking the OP needs to clutch the tractor before hittin the PTO switch. But he said the clutch does effect the PTO. Doesn't sound right to me?

 

[RoyJackson]

Right! I'm thinking the OP needs to clutch the tractor before hittin the PTO switch. But he said the clutch does effect the PTO. Doesn't sound right to me?

With some of the electrically actuated PTOs, depressing the clutch doesn't help, unfortunately. There doesn't appear to be anyway to feather the engagement.

 

[Notforhire]

I had a L3240 GST. The PTO clutch was driven direct from the engine, like the OP's gear tractor. The clutch pedal only controls the traction. It's a live PTO, so if you need to clutch in order to change gears the PTO will remain under power.

Bill

 

[Bluegill2]

With some of the electrically actuated PTOs, depressing the clutch doesn't help, unfortunately. There doesn't appear to be anyway to feather the engagement.

I had a L3240 GST. The PTO clutch was driven direct from the engine, like the OP's gear tractor. The clutch pedal only controls the traction. It's a live PTO, so if you need to clutch in order to change gears the PTO will remain under power.

Bill

Well, that sucks! I'd trade it in on a L3800DT with a two stage clutch and munual pto leaver...:thumbsup:

 

[Bluegill2]

With some of the electrically actuated PTOs, depressing the clutch doesn't help, unfortunately. There doesn't appear to be anyway to feather the engagement.

I had a L3240 GST. The PTO clutch was driven direct from the engine, like the OP's gear tractor. The clutch pedal only controls the traction. It's a live PTO, so if you need to clutch in order to change gears the PTO will remain under power.

Bill

Well, that sucks! I'd trade it in on a L3800DT with a two stage clutch and manual pto leaver...:thumbsup:

 

[n4khq]

So it sounds to me, when you hit the pto switch, it's like popping the pto clutch on an old school tractor? Instant engage. Sounds bad to me. If this is one of the 'bells & whistles' on the Grand L's, then no thank you...

It's new but not the Grand, it is the previous model. You are correct as to clutch popping. LandPride talks about soft start PTO option with I don't have.

 

[n4khq]

I'm still having a problem with the above statement. Try clutching the tractor when you engage the PTO and let us know what happens.

No difference with clutch in or out.

 

[Bluegill2]

It's new but not the Grand, it is the previous model. You are correct as to clutch popping. LandPride talks about soft start PTO option with I don't have.

No difference with clutch in or out.

Bummer! You'll need to get used to the shimmy shimmy bam slam then.

I was seriously considering a L4600DT until I found out it had an electric pto switch. Now I'm looking at other options for replacing our old larger rig.

 

[SPYDERLK]

I've been running bush hogs 30 years and never tighten one that tight. Never had one work loose. This with different brands and sizes.

Im glad for your good fortune.
,,,. My experience is that fasteners are sized to stabilize the joint against any movement, and the joint material is of like strength to endure the bolt force. After seeing multiple bolts loosen multiply on my dad and me copying him I began to tighten fasteners to their full spec when the joined parts were sufficiently robust to take it. Thats the only way Iv found to produce a long term secure joint under load reversal and shock conditions.