Power reverser noise

[kubmech]

A friend of mine just bought a '99 JD 4400 with power reverser. It has a loader and backhoe. He asked me if I thought the noise when clutch was engaging form forward to reverse is normal. I believe this a similar set up to the Kubota hyd. shuttle shift and uses a clutch pack. On the Kubotas the more weight/load that is on the tractor the more pronounced the sound of the clutch engaging is, which is normal. Just wanted to check with you guys to see if I'm in the ballpark with this. The last JD's I worked were the 50/55 series so I'm not that familiar with this model. Any help or opinions would be appreciated. [any breakdowns or scematics John? Curious to see how the system works]

Thanks,
Kubmech

 

[Anonymous Poster]

Well.... I'm certainly no mechanic... but the PowerReverser uses clutch packs... /w3tcompact/icons/wink.gif

<A target="_blank" HREF=http://jdpc.deere.com/pimages/MP23/MP23112________UN29AUG00.gif>JD4400 Partial PowerReverser...(many...many pages)</A>

KEY PART NO. PART NAME QTY TRANSMISSION SERIAL NO. REMARKS
1 19M7868 SCREW 8 M8 X 30
2 F85106 FITTING PLUG 1
3 YZ80803 PLUNGER 1 -XXXXXG
YZ80963 PLUNGER 1 XXXXXH-
4 F65284 SEAL 1
5 F21021SC CAP 1
6 F2710232 DOWEL PIN 3
7 F7400016D BALL 1
8 YZ80595 SPRING 1
9 51M7042 O-RING 1
KEY PART NO. PART NAME QTY TRANSMISSION SERIAL NO. REMARKS
10 YZ80727 PLUG 1
11 F7400014D BALL 2
12 YZ80675 BEARING 2
13 YZ80945 COVER 1 -XXXXXG
YZ81031 COVER 1 XXXXXH-
14 YZ80626 LIFT ARM 2
15 YZ80750 PIN 2
16 YZ80816 SHIM KIT 1
17 YZ80794 CLUTCH 2
18 YZ80653 THRUST WASHER 2
KEY PART NO. PART NAME QTY TRANSMISSION SERIAL NO. REMARKS
19 YZ80651 BEARING RACE 2
20 YZ80650 BEARING 2
21 YZ80258 GEAR 1 57T
22 YZ80259 GEAR 1 57T
23 YZ80815 SHIM KIT 2
24 F40105 BALL BEARING 1
25 YZ80553 UNIVERSAL DRIVESHAFT 1 INPUT
26 YZ80817 GEAR 1 33T
27 F3901098 SNAP RING 1
28 F3901078 RING 1
KEY PART NO. PART NAME QTY TRANSMISSION SERIAL NO. REMARKS
29 F40104 BALL BEARING 1
30 YZ80162 BUSHING 2 LOCATOR
31 YZ80674 BEARING 2
32 YZ80946 SHAFT 1
33 F65289 SEAL 1
34 F65021 SEAL 1
35 YZ80936 SHAFT 1 -XXXXXG
YZ80961 SHAFT 1 XXXXXH-
36 F7125020HBK SPRING PIN 1
37 YZ80623 LEVER 1
KEY PART NO. PART NAME QTY TRANSMISSION SERIAL NO. REMARKS
38 YZ80849 PLATE 1
~~~from the web~~~

 

[kubmech]

Thanks John, once again you come through.

 

[MikeH]

If it's a 4400, it is a Sync-Reverser not a Power Reverser. The clutch must be dissengaged while you shift, you do not need to stop though. Mine does not make any noise.
Power Reverser's are found on 4500, 4600.

 

[kubmech]

Now you're confusing me. The breakdown JM shows has 2 clutch packs with a gear attached to each one which I'm "assuming" are one for reverse and one for forward. That makes sense to me. Although a synch reverser would work as you described I don't understand why you would need two seperate clutch packs???

 

[Anonymous Poster]

<font color=blue>...it is a Sync-Reverser not a Power Reverser...</font color=blue>

You're absolutely correct Mike... /w3tcompact/icons/blush.gif

I had pulled this picture from a "World" parts manual (via the internet) for the 4400... with cabs, front pto, etc. things the US market doesn't have currently... I don't believe the power reverser tranny is on any 4400 anywhere in the world... from my "quick" searches... but anything is possible... /w3tcompact/icons/smile.gif

(...but all the JD PowerReverser's use clutch packs from compacts to large ag units...)

 

[kubmech]

So the synch reverser has no clutch pack?

 

[Anonymous Poster]

No, the sync reverser doesn't have clutch packs... uses standard clutches (one for trans. & one for IPTO)... then there is a couple "flavors" of sync reversers... /w3tcompact/icons/eyes.gif

I've got a bunch of pages (web & not in exact order...!) to weed through... I'll eventually get there... hopefully sooner than later... /w3tcompact/icons/wink.gif

 

[kubmech]

Sorry John, I did'nt mean to ask a hard question. Thanks for all the help. So basically if he has the synch reverser I would think any noise while shuttling sounds like a problem.

 

[kubmech]

Just in case anyone is interested. The noise turned out to be the front axle drive shaft. It had some play in it and would cause a clunk intermittently when shifting from forward to reverse. Again Thanks for the help guys.