Case Powershift sticking in reverse.

SamT1

Member
So I’m still working on grandpas old 1070 Powershift. It sat for 3-5
years before I started on it. It is still hanging in reverse now and then.

When it hangs the lever won’t move and you have to tap the shifter
shaft with a little hammer and it will usually release and work like
new. When I put a new cable in I did put an effort into finding the
detent and setting it where the pin drops in with the lever bottomed
and the linkage in the detent. But you couldn’t feel the detent every
time.

So it’s got new oil and filters. Everything else shifts good. It works
fine 19 of 20 times. Should I change the oil again or is it still out of
adjustment? Something is need to clean?
 
The cable is misadjusted, the fork that moves the spool must have play in both directions when the lever is moved in reverse, the reverse lockout spool engages a slot in the shift spool and is spring released, if there is tension on the reverse lockout spool holding the lockout spool tight the spring does not have enough force to release it, I usually just move the large nuts on the cable bracket till there is play at the fork.
 

cvphoto57349.jpg




cvphoto57350.jpg


The control module picture indicates there are no detent parts within the module. Therefore, the detents have to be within the control lever system.

Step one seems to be to first fix any problems with the detents while the control module is disconnected. Then reconnect and adjust the control lever linkage properly and also adjust the clutch lever linkage properly.

If the problem persists, there might be something wrong within the control module.
 
There is a detent ball and spring under the top cover in the control valve, that is not the problem, I have done many of those that were sticking just as you describe, try what I told you before you start complicating your life. I spent many years on these units and adjusting the cable has never failed to fix it. The pictures do not even show a top cover or a ball and spring, that does not mean they do not exist. I guess I should ask if your power shift cable is not partially frozen as that could cause binding also that would hold the slot in the spool against the reverse lockout spool.
 
If you look at Ron's pictures carefully you will see the ridges in the top of of the spool where the detent ball rides , also you will see a milled slot on the spool side where the reverse lockout spool rides when in the forward position, not seen is a square cut notch behind the milled slot that the reverse lockout plunger seats to keep from accessing forward without clutching when in reverse, there is no external detenting in the levers, it is internal to the control valve as previously pointed out.
 
I have been reading this forum for a few years now and I must say I am blown away by the willingness of some of you folks to share your hard-earned knowledge with those of us who need it.
Your generosity in these times of ME, MYSELF AND I reminds me that there are plenty of smart, helpful but silent folks who will give, for free, knowledge gained from bruised knuckles, black fingernails, cuts, scrapes and other injuries.
You helpful people are TRULY what MAKES AMERIC GREAT.
I started to list a bunch of names here, but decided I would probably miss someone who deserves to be listed, so I will just say THANKS, YOU GUYS KNOW WHO YOU ARE!
 
Yes! This forum in particular seems to have guys willing to help.

Locally and on many online forums , you ask any old mechanics and they tell you to park the case in a weed row.
 

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