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Implement Alley Discussion Forum

JD #5 Sickle timing/ Is the Pittman what adjusts timing?

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05-12-2008 11:35:05

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Picked up an old John Deere #5 mower that has been parked outside for 25 years without being used. Put on a new sickle and sections, and several rock guards and various small parts.
Replaced pittman wood. The new pittman seems to be too short compared to the old warped and rotted one. The sections need to go one more inch to the right to be timed underneath the rock guards. The brand new pittman is supposed to be the correct one for a JD#5 mower. Do I need to make my own Pittman to the correct length? Is the big heavy steel bar behind the sections adjustable for in and out movement. If it was, I could move it an inch and 1/4 to the inside direction, and it would seem to be timed then


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James Howell

05-12-2008 12:24:55

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 Re: JD #5 Sickle timing/ Is the Pittman what adjusts timing? in reply to Andrew1957, 05-12-2008 11:35:05  
If you are sure that you have the correct pitman, then there is no need to build your own.

Go by the local Tractor Supply and measure the Z9298 or Z9892 pitman. Can't remember which number is correct.

Rotate the PTO shaft until the pitman moves the knife to the end of the outward stroke.

Look at the sections in relation to the guards.

The tip of the section should be squarely underneath the guard.

If you need to 'register' the knife to align the sections and guards, you will need to adjust the yoke on the drag bar.

I believe the long bar that connects to and supports the yoke is called the Drag Bar.

On the end of the drag bar there is a ring with a pin through it that secures the yoke.

Remove the pin and ring.

There will be several yoke washers of various widths inside the yoke.

Put these yoke washers on whatever side necesary to reposition the yoke.

There is a better description on 'registering the knife' in all versions of the Operator's Manual.

Hope this helps.

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05-12-2008 11:54:07

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 Re: JD #5 Sickle timing/ Is the Pittman what adjusts timing? in reply to Andrew1957, 05-12-2008 11:35:05  
Don't have pitman stick to measure for you off hand but JD parts site might give dimensions if you have the pitman number to look up? Timing is called registering the sickle bar knives in the center of the guards which should happen at the long and short end of each stroke of the pitman. Having the pitman length way off isn't going to help and needs to checked or corrected first. Registering it is done by removing drag bar collar and cotter pin moving shims around on the drag bar to move the bar with guards to the left or right to get them centered with knives. Off register will result in unsmooth cutting and hard pulling draft and plugs that can break the pitman stick right away. A operators manual OMH10156 available yet from JD shows how all that works and many other adjustments too.

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