Yetter 5000-025C User manual

5000 SERIES STALK DEVASTATOR
CORN STALK ROLLER
*PATENTED*
5000-025C, 5000-026C, 5000-027C, 5000-028C, 5000-034B
John Deere Model Corn Heads (606C, 643, 693, 706C, C6R, 608C,
843, 893, 708C, C8R, 612C, 612FC Folding, 712C, 1243, 1293,
C12F, C12R, 616C, 716C, C16F, & C16R)
OWNER’S MANUAL
PART IDENTIFICATION
2565-785_Rev_F –6/2021
YETTER MANUFACTURING CO.
Founded 1930
Colchester, IL 62326
Toll free: [phone].
Fax: [phone]
Website: yetterco.com
E-mail: [e-mail]

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Table of Contents
Foreword.....................................................................................................3
Warranty......................................................................................................3
Safety Information .................................................................................4 - 6
Pictorial Part List ...................................................................................7 - 9
Bolt Torque & Tools Required .................................................................10
Assembly Instructions ......................................................................11 - 36
5000-025C....................................................................................11 –15
5000-026C....................................................................................16 –20
5000-027C....................................................................................21 –25
5000-028C....................................................................................26 –31
5000-034B...................................................................................3 32 –36
Operation / Maintenance / Lock Up .........................................................37
Part Identification ............................................................................. 38 –47
Troubleshooting .......................................................................................50

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FOREWORD
You’ve just joined an exclusive but rapidly
growing club.
For our part, we want to welcome you to the
group and thank you for buying a Yetter product.
We hope your new Yetter products will help you
achieve both goals-increase your productivity and
increase your efficiency so that you may generate
more profit.
This operator’s manual has been designed into
four major sections: Foreword, Safety
Precautions, Installation Instructions and Parts
Breakdown.
This SAFETY ALERT SYMBOL
indicates important safety messages in
the manual. When you see this
symbol, be alert to the possibility of
PERSONAL INJURY and carefully
read the message that follows.
The word NOTE is used to convey information
that is out of context with the manual text. It
contains special information such as
specifications, techniques and reference
information of a supplementary nature.
The word IMPORTANT is used in the text when
immediate damage will occur to the machine due
to improper technique or operation.
Important will apply to the same information as
specified by note only of an immediate and
urgent nature.
It is the responsibility of the user to read the
operator’s manual and comply with the safe and
correct operating procedure and to lubricate and
maintain the product according to the
maintenance schedule in the operator’s manual.
The user is responsible for inspecting his
machine and for having parts repaired or
replaced when continued use of the product
would cause damage or excessive wear to the
other parts.
It is the user’s responsibility to deliver his
machine to the Yetter dealer who sold him the
product for service or replacement of defective
parts, which are covered by the warranty policy.
If you are unable to understand or follow the
instructions provided in this publication, consult
your local Yetter dealer or contact:
YETTER MANUFACTURING CO.
309/776-4111
800/447-5777
309/776-3222 (FAX)
Website: www.yetterco.com
E-mail: [e-mail]
WARRANTY
Yetter Manufacturing warrants all products manufactured and sold by it against defects in material.
This warranty being expressly limited to replacement at the factory of such parts or products as shall
appear to be defective after inspection. This warranty does not obligate the Company to bear cost
of labor in replacement of parts. It is the policy of the Company to make improvements without
incurring obligations to add them to any unit already sold. No warranty is made or authorized to be
made, other than herein set forth. This warranty is in effect for one year after purchase.
DEALER: ________________________________________
Yetter Manufacturing warrants its own products only and cannot be responsible for damages
to equipment on which mounted.

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BE ALERT!
YOUR SAFETY IS INVOLVED
WATCH FOR THIS SYMBOL. IT POINTS OUT IMPORTANT SAFETY
PRECAUTIONS. IT MEANS “ATTENTION – BE ALERT!”
It is your responsibility as an owner, operator, or supervision to know and
instruct everyone using this machine at the time of initial assignment and at
least annually thereafter, of the proper operation, precautions, and work
hazards which exist in the operation of the machine in accordance with
OSHA regulations.
Safety Is No Accident
The following safety instructions, combined with common sense, will
save your equipment from needless damage and the operator from
unnecessary exposure to personal hazard. Pay special attention to
the caution notes in the text. Review this manual at least once a year
with all operators.
1. Read and understand the operator’s manual before operating this machine.
Failure to do so is considered a misuse of the equipment.
2. Make sure equipment is secure before operating.
3. Always keep children away from equipment when operating.
4. Make sure everyone that is not directly involved with the operation is out of the
work area before beginning operation.
5. Make sure all safety devices, shields, and guards are in place and functional
before beginning operation
6. Shut off all power to adjust, service, or clean.
7. Keep hands, feet, and clothing away from moving parts. It is a good idea to
remove all jewelry before operating.
8. Inspect the machine periodically during operation for signs of excessive wear,
loose fasteners, and unusual noises.

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PLEASE READ, VERY IMPORTANT
SECURE CORN HEADER AGAINST UNWANTED LOWERING BY
APPLYING THE LOCKING MECHANISM ON THE HYDRAULIC CYLINDERS!
1. Attach head to combine, lock head to combine
2. Raise the head off the ground and engage safety stop on the feeder house cylinder.
3. Apply combine parking brake, turn off combine engine, and remove the key
4. Wear personal protective equipment during installation: steel toe footwear, safety
glasses, & gloves
FOLLOW ALL INSTRUCTIONS GIVEN BY THE COMBINE
MANUFACTURER

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PLEASE READ, VERY IMPORTANT
Subject to the size and weight of the corn header, one
or two additional hydraulic cylinders may be required.
The combine manufacturer generally keeps
corresponding kits readily available for dealers.
Subject to the design of the corn header and the
carrying capacity of different combines, the steering
axle may require the fitting of additional weights and
the rear tires be filled with ballast.
FOLLOW ALL INSTRUCTIONS GIVEN BY THE COMBINE
MANUFACTURER

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PICTORIAL PART LIST
BEFORE INSTALLATION BEGINS, PLEASE CHECK THAT ALL PARTS WERE
RECEIVED BY GOING THROUGH THE CRATE AND SORTING THE PARTS!!!
5000-025C –JD 606C, 643, 693, 706C, C6R & Wheel tracks only for 612C, 712, 1243, 1293, C12F/R, 616C, 716 &
C16F/R Part List 4) 5000-136, 4) 5000-138, 4) 5000-139, 1) 5000-165, 4) 5000-202, 2) 5000-256, 2) 5000-259, 2)
5000-272, 2) 5000-275A, 4) 5000-355
5000-026C –JD 608C, 708C, 843, 893, & C8R Part List –6) 5000-136, 6) 5000-138, 6) 5000-139, 1) 5000-165, 6)
5000-202, 1) 5000-203B, 1) 5000-255, 3) 5000-256, 3) 5000-259, 2) 5000-272, 2) 5000-275A, 2) 5000-301, 6) 5000-
355
5000-027C –JD 612C, 712C, 1243, 1293, & C12R Part List –8) 5000-136, 8) 5000-138, 8) 5000-139, 1) 5000-
165, 8) 5000-202, 4) 5000-256, 4) 5000-259, 4) 5000-272, 4) 5000-275A, 2) 5000-301, 8) 5000-355
5000-028C –JD 616C, 716C, C16R, & C16F Part List –12) 5000-136, 12) 5000-138, 12) 5000-139, 1) 5000-165,
12) 5000-202, 2) 5000-203B, 2) 5000-255, 6) 5000-256, 6) 5000-259, 4) 5000-272, 4) 5000-275A, 12) 5000-355
5000-034B –JD 612FC, 712FC, & C12F Folding Part List –8) 5000-136, 8) 5000-138, 8) 5000-139, 1) 5000-
141, 1) 5000-165, 4) 5000-202, 6) 5000-256, 2) 5000-259, 4) 5000-263, 4) 5000-272, 4) 5000-275A, 8) 5000-355
5000-080 –5” Extension Kit Parts List (Optional) –2) 2502-363 –½” X 4 ½” GR 5 Bolts, 2) 2502-365 –½”-13 X
3 ¾” GR 5 Bolts, 6) 2520-357 –½” Lock Nuts, 2) 5000-378 Spacer Bushings, 2) 5000-393 5” Extension Plates, &
2) 5000-394 Short Spacers
5000-082 –2” Lift Kit Parts List (Optional) –2) 5000-408 Extender Plate, 1) 5000-409 Connector Pin
5000-083 –6 Row Devastator Lock Up Kit (Optional) –1) 5000-161Hardware Bag, 1) 5000-430 Lock Pin
5000-084 –8/12 Row Devastator Lock Up Kit (Optional) –1) 5000-162 Hardware Bag, 2) 5000-430 Lock Pin
5000-202
5000-203B -48”
5000-211B -76”
5000-254 – 80”
5000-255- 52”
5000-256 (LH)
5000-259 (RH)
5000-355
5000-136
5000-301
2550-059
5000-139
5000-138
5000-080
OPTIONAL
ONLY USED ON
893 & 1293
5000-141
5000-263
5000-272 – 72”
5000-275A- 75”

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PICTORIAL PART LIST
5000-136 Hardware Bag
 2502-325 - 5/8-11 X 3 HHCS GR 5 ZP – QTY 1
2502-353 – ½-13 x 2 ½, HHCS, GR8, ZP – QTY 3 
 2510-121 - 5/8 DIA. SHLDR, 2-1/4 L SHLDR, ½-13 QTY 1
2520-357 - 1/2-13 LOCK HEX NUT, GR A, ZP – QTY 3 
 2520-364 - 1/2-13 HEX LOCKNUT, JAM, GR 2 – QTY 1
2520-459 - 5/8-11 LOCK HEX NUT, GR 5, ZP – QTY 1 
 2520-515 - 3/4-10 LOCK HEX NUT, GR A, ZP – QTY 1
2526-449 - 5/8FLATWASHER1/4+- .010 THK, ZP – QTY 2 
 2550-709 - 1/2 WIRE 2-1/2 OD X 1-1/2 ID X 7-1/4 COMP SPRING – QTY 1
2570-126 - 3/4 X 10 EYEBOLT, ZP – QTY 1 
 2975-302 - 2975 SPRING BUSHING, PAINTED – QTY 1
5000-318 - PIVOT BUSHING – QTY 1 
 5000-322 - SHIM WASHER ZP – QTY 1

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PICTORIAL PART LIST
5000-138 Hardware Bag
5000-139 Hardware Bag
5000-141 Hardware Bag
 2502-365 - 1/2-13 X 3-3/4 HHCS GR5 YD – QTY 2
2520-357 - 1/2-13 LOCK HEX NUT, GR A, ZP – QTY 2 
 5000-378 - SPACER BUSHING – QTY 2
 2502-352 - 5/8-11 X 6 HHCS GRADE 8 ZP – QTY 4
2505-345 - 1/2-13 X 2 CAR BLT GR5 ZP – QTY 2 
 2520-361 - 1/2-13FLANGE WHZLCK HXNT, GR 5, ZP - QTY 2
 2570-465 - 7 GA. HAIRPIN COTTER ZP – QTY 2
2520-459 - 5/8-11 LOCK HEX NUT, GR A, ZP – QTY 4 
5000-309 - SUPPORT STRAP – QTY 2 
 5000-319 - MOUNT STRAP 3“ – QTY 2
5000-323 - LOCK UP PIN ZP – QTY 1 
 2505-414 – 5/8 – 11 X 6 CARRIAGE BOLT, GR 5 ZP – QTY 2
5000-402 – WEDGE – QTY 2 

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BOLT TORQUE
Important: Over-tightening hardware can cause just as much damage as under-tightening.
Tightening hardware beyond the recommended range can reduce its shock load capacity.
All hardware on the 5000 Devastator is either Grade 5 or Grade 8, unless otherwise noted. Grade 5 cap
screws are marked with three radial lines on the head. Grade 8 cap screws are marked with six radial
lines on the head. If hardware must be replaced, be sure to replace it with hardware of equal size,
strength and thread type. Refer to the torque values chart when tightening hardware.
The chart below is a guide for proper torque. Use it unless a specified torque is called out elsewhere in
the manual.
Torque is the force applied to the end of the handle or cheater bar, times the length of the handle or bar.
Use a torque wrench wherever possible
The following table shows torque in ft.-lbs. for coarse thread hardware.
INSTALLATION TOOLS REQUIRED:
- Pneumatic or electric impact driver
- ¾ & 15/16 size sockets
- 10” impact driver extension
- Ratchet
- ¾, 15/16, & 1 1/8 size wrenches
- 5/16 Allen Wrench
- Torque Wrench

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5000-025C ASSEMBLY INSTRUCTIONS
(606C, 643, 693, 706C, C6R or Wheel Track only on 12 & 16 row JD corn heads)
Step 1: Attach the 5000-202 mount brackets to the frame using the 5/8 x 6 bolts, mounting straps, and 5/8” lock hex nuts.
Mounting Brackets will be located under the snouts between rows 1 & 2, 2 & 3, 4 & 5, and 5 & 6. Slide the mount bracket up so
the deck plate adjustment rod is located in the cut out of the mount bracket. . If corn head is equipped with protective shield
(like pic with the arrow shows), you can either: remove each shield, cut a notch in each shield, or bend each shield upwards to
gain clearance. The shields on a 90 series head will need removed.
Note: Do not fully tighten hardware until Step 6 after all of the pivot arms & springs are installed.
6 Row
Arrows indicate 5000-202 mount bracket locations, mounts will go on front side of frame, straps on back side of frame.
12 Row Wheel Tracks
Arrows indicate 5000-202 mount bracket locations (rows 3/4 & 4/5 and 8/9 & 9/10 could also be used)
16 Row Wheel Tracks
Arrows indicate 5000-202 mount bracket locations (rows 5/6 & 6/7 and 9/10 & 10/11 could also be used)

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5000-025C ASSEMBLY INSTRUCTIONS
Step 2: Attach the 5000-309 support straps using ½” x 2 carriage bolts & ½” flange lock nuts, tighten.
Step 3: Install 5000-323 lock-up pin in storage location on each mount bracket. Secure with hairpin clips.

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5000-025C ASSEMBLY INSTRUCTIONS
Step 4: Attach the pivot arms to the mount brackets using 5/8” X 3” bolts, pivot
bushings, & lock hex nuts. Use the model below to determine where the LH & RH pivot
arms get installed. Tighten this hardware.
Step 5: Install the push rods into the mount brackets then attach to the pivot arms with
the 5/8” shoulder bolts, washers, and ½” jam lock nuts.
Note: The washers are installed on each side of the “eye” of the push rod.
Now install the compression spring, spring bushing, and ¾” lock hex nuts. Tighten the
hardware from Step 5 to the specification in the diagram below.
NOTE: Tightening the nut on the spring bushing more will result in added
down pressure. However, DO NOT tighten the nut on the spring bushing
down so far that spring compression limits pivot arm travel. This will cause
the spring to break, especially if spring is compressed all off-season.

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5000-025C ASSEMBLY INSTRUCTIONS
Step 6: Secure the mounting bracket installed in Step 1 at this time by tightening the 5/8 X 6” bolts & 5/8 lock nuts.
Make sure the compression spring clears the cylinder channel as well as the rocker arm of the deck plate adjustment.
The offset pivot arm clamp (5000-256 & 5000-259) should be under the center of the snout, not directly under the row.
Row 1 & 2 Row 2 & 3
Row 4 & 5 Row 5 & 6
Note: On 12 row heads installing on wheel tracks only, the top pictures on this page will illustrate
rows 4 & 5 and 5 & 6. The bottom pictures on this page will illustrate rows 7 & 8 and 8 & 9.
Note: On 16 row heads installing on wheel tracks only, the top pictures on this page will illustrate
rows 6 & 7 and 7 & 8. The bottom pictures on this page will illustrate rows 9 & 10 and 10 & 11.

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5000-025C ASSEMBLY INSTRUCTIONS
Step 7: Install the Roller Arm Mount Tube inside the clamp channel of the pivot arms using the 5000-138 bolt
bag. Do not tighten this hardware until after the rollers have been installed in Step 8.
NOTE: Install the Roller Arm Mount Tube on so that the bearing support tab is on the back side to help support
the bearings.
Step 8: Insert the shim washer over the shaft on each end of the roller. Install the bearing over the shaft on each
end of the roller so that the side of the casting that has the bearing protruding past the housing surface is towards
the roller barrel & shim washer. Lift each roller into place, traction bar in front of the rebar, so that the bolt holes
on the cast line up with the mounting tabs on the roller arm mount tube. Install the ½” X 2 ½” bolts & tighten the
½” lock nuts. Once the roller & bearing hardware is fastened, spin the roller to ensure the bearing was installed
correctly. If the roller was installed incorrectly, the roller will not spin or will have drag. Slide the roller mount tube
to gain clearance on each end of the corn head & then tighten the hardware from Step 7. The traction bars DO
NOT have to be directly centered under each row.

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5000-026C ASSEMBLY INSTRUCTIONS
(JD 608C, 708C, 843, 893, & C8R)
Step 1: Attach the 5000-202 mount brackets to the frame using the 5/8 x 6 bolts, mounting straps, & 5/8” lock hex nuts.
Mounting Brackets will be located under the snouts between rows 1 & 2, 2 & 3, 3 & 4, 5 & 6, 6 & 7, and 7 & 8. Slide the mount
bracket up so the deck plate adjustment rod is located in the cut out of the mount bracket. On JD 893 corn heads, use the
5000-301 L Clamp Plate with the mounting brackets between rows 1 & 2 and 7 & 8 If corn head is equipped with protective
shield (like pic with the arrow shows), you can either: remove each shield, cut a notch in each shield, or bend each shield
upwards to gain clearance. The shields on a 90 series head will need removed.
Note: Do not fully tighten hardware until Step 6 after all of the pivot arms & springs are installed.
Arrows indicate 5000-202 mount bracket locations, mounts will go on front side of frame, straps on back side of frame.

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5000-026C ASSEMBLY INSTRUCTIONS
Step 2: Attach the 5000-309 support straps using ½” x 2” carriage bolts & ½” flange lock nuts, tighten.
Step 3: Install 5000-323 lock-up pin in storage location on each mount bracket. Secure with hairpin clips.

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5000-026C ASSEMBLY INSTRUCTIONS
Step 4: Attach the pivot arms to the mount brackets using 5/8” X 3” bolts, pivot
bushings, & 5/8” lock hex nuts. Use the model below to determine where the LH & RH
pivot arms get installed. Tighten this hardware.
Step 5: Install the push rods into the mount brackets then attach to the pivot arms with
the 5/8” shoulder bolts, washers, and ½” jam lock nuts.
Note: The washers are installed on each side of the “eye” of the push rod.
Now install the compression spring, spring bushing, and ¾” lock hex nuts. Tighten the
hardware from Step 5 to the specification in the diagram below.
NOTE: Tightening the nut on the spring bushing more will result in added
down pressure. However, DO NOT tighten the nut on the spring bushing
down so far that spring compression limits pivot arm travel. This will cause
the spring to break, especially if spring is compressed all off-season.

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5000-026C ASSEMBLY INSTRUCTIONS
Step 6: Secure the mounting bracket installed in Step 1 at this time by tightening the 5/8 X 6” bolts & 5/8”
lock nuts. Make sure the compression spring clears the cylinder channel as well as the rocker arm of the
deck plate adjustment. The offset pivot arm clamp should be under the snout, not directly under the row.
Row 1 & 2 Row 2 & 3 Row 3 & 4
Row 5 & 6 Row 6 & 7 Row 7 & 8

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5000-026C ASSEMBLY INSTRUCTIONS
Step 7: Install the Roller Arm Mount Tube inside the clamp channel of the pivot arms using the 5000-138 bolt
bag. Do not tighten this hardware until after the rollers have been installed in Step 8.
NOTE: Install the 2 & 3 row Roller Arm Mount Tube on so that the bearing support tab is on the back side to
help support the bearings.
Step 8: Insert the shim washer over the shaft on each end of the roller. Install the bearing over the shaft on each
end of the roller so that the side of the casting that has the bearing protruding past the housing surface is towards
the roller barrel & shim washer. Lift each roller into place, traction bar in front of the rebar, so that the bolt holes
on the cast line up with the mounting tabs on the roller arm mount tube. Install the ½” X 2 ½” bolts and tighten the
½” lock nuts. Once the roller & bearing hardware is fastened, spin the roller to ensure the bearing was installed
correctly. If the roller was installed incorrectly, the roller will not spin or will have drag. Slide the roller mount tube
to gain clearance on each end of the corn head & then tighten the hardware from Step 7. The traction bars DO
NOT have to be directly centered under each row.