[swayback]

First off hello to all that read my ? . I have a 93 855 I got this tractor from a local park so when this started I do not know. When I put the PTO in the rear or the front shaft dose not turn. The tractor will lug down like it has a load on it but no movement in the PTO shaft. I changed the oil filters and removed the strainer at the bottom. I when trouble shot the safety switches and the voltages were right. If anyone has a Idea I will try it out.

 

[JDFANATIC]

swayback,

Welcome to the forum! :Welcome1: Hopefully one of our mechanic posters will chime in with an easy fix.

 

[swayback]

Thanks anyone that will help point me in the right way would be a help.

 

[TooManyGT]

Are you able to turn the shafts by hand? Is it a multi speed pto? Sounds like it might be stuck in 2 speeds at once. Either that or something is jammed keeping it from turning since you said it was loading the engine when engaged.

Brad

 

[Upper5Percent]

First order a copy of TM1360 from John Deere...

Then go to Section 250 Power Train Operations and Tests

but I digress...

When you engage the PTO lever does the light come on?
(Pages 240-15-8 and 240-15-9 covers the PTO CIRCUIT OPERATION)
You could lift the seat and pull UP the OPERATOR OFF SEAT PLUNGER , make sure your PTO selector is for the REAR ONLY and then try to engage your PTO ...what happened???


NO light...did you check your PTO magnet and TDL module?

Assuming the light comes on and the PTO shaft does NOT turn...keep reading...


How to adjust the PTO Lever and Lever selector

1. Remove left wheel and fender
2. Make sure lever is in the OFF position
3. Disconnect the PTO valve linkage.
4. Pull the PTO valve arm and PTO rod REARWARD.
5. Turn yoke until hold-in yoke aligns with hold-in arm.
6. Connect PTO valve linkage.

After adjustment go to step 7 group 5 (page 250-05-3)<<If you fail to operate you're back to here...
If PTO still does NOT engage/disengage.

Disconnect adjustable link from arm on side of transmission case and shift by hand.

If PTO can be engaged /disengaged properly, external linkage is binding or out of adjustment.

If arm moves but does not engage/disengage PTO(s), PTO linkage is not shifting PTO selector valve (hydraulic valve problem).

If the selector shaft in the side of the transmission case is stuck/binding: Try to free up by operationg arm with vice grips or large pliers.

If still binding or rotates hard, it may need to be driven from case to clean/service.
USE THE FOLLOWING PROCEDURE:
1.Drive spring pin out and remove the arm from the shaft.
2.Remove PTO cover from rear of transmission.
If needed, rotate shaft so that the inner arm on the shaft clears the PTO reduction shaft.
Drive shaft from INSIDE of case and remove.
Clean/service and reinstall.

IF PTO STILL DOES NOT ENGAGE,

DISASSEMBLE TRANSAXLE (See Section 50)<<<You better have the manual at this point...
AND INSPECT FOR:
Damaged PTO valve or selector lever linkage.
Damaged PTO valve.
Damaged PTO clutch pack.
Damaged PTO brake pack.
Damaged PTO gears or shift collar.

 

[Mechanos1]

The fact that you hear the engine load down suggests to me that the PTO clutch pack is engaging, but the PTO break is not releasing. You can get to the PTO brake pretty easily by removing the gear pump and a cover plate. Possibilities are a clogged oil passage, stuck piston, cut or worn o-rings.... amoung others, I'm sure.

 

[swayback]

I can turn the shaft by hand it has one time not let me turn it.
I have just got a manual on it that is where I got to test all of the switches.
It is a 2 speed pto fast and slow. Also one under and on the back of it.
I was thinking also that the pto break might be stuck b/c of the tractor loading up. I do not have a working light panel to tell you if the pto light is coming that will be in the works when I get this working.Thanks again for the tips on this issue. I will start trying them out when I can get some time off. If there is anything else please post it.

 

[Upper5Percent]

I can turn the shaft by hand it has one time not let me turn it.
I have just got a manual on it that is where I got to test all of the switches.
It is a 2 speed pto fast and slow. Also one under and on the back of it.
I was thinking also that the pto break might be stuck b/c of the tractor loading up. I do not have a working light panel to tell you if the pto light is coming that will be in the works when I get this working.Thanks again for the tips on this issue. I will start trying them out when I can get some time off. If there is anything else please post it.

In my above post, when I say that the PTO does NOT turn...I'm referring to engaging the switch and the PTO does NOT turn...

 

[swayback]

First off thanks Paul for the comments. That's what I thought you meant but 2 times it would not spin by hand.

 

[georgesusi]

Swayback: I have a 92- 955 which was almost the same with a little larger engine. Otherwise I believe to be about the same in operation. At your left heal there is the selector lever for mid, rear, or both mid and rear simultaneously. If it is engaged for the rear pto, you will not be able to turn it by hand. The same is true for the mid mount.

 

[swayback]

First off thank to all that have replied with ideas on my problem. I wanted to tell what I have found on this issue. I think that it in fact is the PTO brake that was the issue. When I tore it down all of the plates were stuck together and part of the clutches were fused to the steel discs.Took two times putting it back together for it to spin like it should. So got new discs,clutchs,springs,and o rings on the way. One ? how long to I soak the new clutches in oil.

 

[Mechanos1]

First off thank to all that have replied with ideas on my problem. I wanted to tell what I have found on this issue. I think that it in fact is the PTO brake that was the issue. When I tore it down all of the plates were stuck together and part of the clutches were fused to the steel discs.Took two times putting it back together for it to spin like it should. So got new discs,clutchs,springs,and o rings on the way. One ? how long to I soak the new clutches in oil.

I'm not sure what Deere recommends for this, but when I've rebuilt automatic transmissions in the past, I've always soakd the new clutch discs overnight. That may be longer than necessary, but it sure can't hurt anything..... you can't soak them too long.

Them dang little clutches and steel are quite pricy, aren't they?

 

[swayback]

Yea that was my line of thinking the same as a auto trans. For what you get they are high 24 for the clutches and 3.5 for the steel plus 10 and 6 for the springs. You may or may not have to replace them but I look at it like rebuilding a head.

 

[Mechanos1]

Yea that was my line of thinking the same as a auto trans. For what you get they are high 24 for the clutches and 3.5 for the steel plus 10 and 6 for the springs. You may or may not have to replace them but I look at it like rebuilding a head.

Yeah, I priced them out to replace both the brake pack and the clutch pack in my 955. It would cost a about $400. The 955 has one more clutch and steel in both the brake and the clutch packs.

 

[Upper5Percent]

First off thank to all that have replied with ideas on my problem. I wanted to tell what I have found on this issue. I think that it in fact is the PTO brake that was the issue. When I tore it down all of the plates were stuck together and part of the clutches were fused to the steel discs.Took two times putting it back together for it to spin like it should. So got new discs,clutchs,springs,and o rings on the way. One ? how long to I soak the new clutches in oil.

Section 50 of the John Deere Technical manual just talks about refilling the System Reservoir with 17 Liters of JD Hy-Gard

Did you measure the thickness of the clutches?
Minimum thickness 1.9mm

There are quite a few critical measurements in this process...identified on page 50-10-3...and short of typing it all in...I again say you would be well served to get a copy from John Deere

oh yeah...the various torque numbers are critical as well during reassembly...