John Deere Upper Doffer Adjustment
Housing and Sprockets Assembly

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Cotton-picking machines are critical to cotton harvesting. Multiple parts go with the machinery and each component. The upper doffer adjustment housing and sprocket assembly is a section that may have parts needing replacement. The chart linked here shows available parts making up the assembly. Tolerances are important when manufacturing components that function together in an assembly. Components for the upper doffer adjustment housing and sprockets assembly are no different.
Aftermarket parts are compared closely to the OEM style, and they fit the same. The only difference is the name brands are not the same. Dealers push to sell aftermarket products because they know people will buy more if it is more affordable. The farmers find they are less stressed during the peak of the harvest season because they know there will be little to no delays when waiting for parts to come in.
It takes the correct alignment on the shaft of the doffer. An efficient harvest depends on this, along with proper maintenance. When the parts go into the shop for repair, you can expect the mechanic to have all the tools necessary to put together the doffer assembly and grind the doffer’s surface.
Grinding the surface allows for maximum use. The mechanics will also check the abrasiveness so that the cotton is stripped from the spindles when they flow by. All adjustments are made, and everything is double-checked. Knowing the parts that were there when needed is the most extraordinary relief.
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The Parts of the Upper Doffer
Adjustment Housing and Sprockets Assembly

When breakdowns occur, Certi-Pik, USA keeps the shelves well stocked. Our attention is placed on replacing individual pieces needing replacement in this assembly rather than forcing the customer into buying the whole assembly. Due to some customer requests we have made available an assembly of the fine doffer adjustment parts that were introduced with the CP770 Cotton Picker. This will allow a faster method to have all the parts ready to drop into place by simply removing one bolt, pulling out the old assembly and tightening in the new. When the part is ordered, it can be in the farmer’s hands the next day.
When it comes to the parts for the Fine Doffer Adjustment, we have made several notable improvements: A primary area of concern was the bottom Retainer Clutch. It was made with a longer hex to fully engage the plate to prevent premature slipping. All Bushings, Clutches, and Gears that were previously supplied by OEM as powdered metal have been made of steel to increased durability. Increasing the wall thickness of the top tube spacer was also taken into consideration for an increased wear surface. The Previously Aluminum Hex Spacer Busing is also now made of steel which also increases strength. We strive to partner with our customers to find solutions to help improve your part in cotton harvesting.
Certi-Pik, USA is widely called upon by dealers. When issues cause breakdowns, the farmer goes to the dealer or supplier and can get full service. The dealer knows the farmer appreciates the stores selling the parts so they can get machines back up in full operation. When parts of the upper doffer assembly go out, these are the parts to look up:

  • Pro Upper Doffer Spacer
  • Chain Sprocket
  • Doffer Drive Link Chain, 62 Links, 12 Bar
  • Doffer Drive Link Chain, 75 Links, 16 Bar
  • In-Line Only Spur Gear 19-Tooth
  • Hex Doffer Drive Shaft – (9900-9965)
  • Pro Hex Doffer Drive
  • 1/4 X 1-1/2 Spring Pin
  • Pro 1/4 X 1-3/4 Spring Pin
  • M10 x 30 Flange Bolt & M10 Serrated Nut
  • M16 Flange Idler Nut
  • Top Idler Washer 21/32” x 1-9/16” x .18”
  • Idler Spur Gear 25 Tooth
  • Snap Ring
  • 7/8 Hex Nut
  • M24 Pro Upper Doffer Adjustment Nut
  • Upper Doffer Adjustment Housing
  • Pro Upper Doffer Adjustment Housing
  • Housing Shim
  • Adjuster – (9900-9965)
  • Pro Doffer Adjuster
  • Upper Doffer Bearing
  • In-Line Spacer
  • Idler Bearing
  • Idler Hex Spacer, Replaces N278451
  • M16 x 70 Round Head Idler Bolt
  • M10 x 20mm Round Head Bolt

More Parts Complimenting the Fine Doffer Adjustment Assembly

The Adjustment Hex Shaft Parts:

  • Pro Upper Doffer Spacer
  • Top Hex Bushing
  • Spacer – Heavier Wall
  • Spring
  • Spring Pin, 5/32” x 15/16”
  • Hex Shaft – Heat Treated
  • Top Hex-Bore Top Clutch – Heat Treated Steel For Increased Durability
  • Bottom Round-Bore Retainer Clutch – Longer Hex For Full Plate Engagement – Heat Treated Steel For Increased Durability
  • Plate – Front
  • Plate – Rear
  • Washer – 25 x 36 x 2mm
  • Bushing – Stronger Steel Hex Spacer
  • Spur Gear – 25 Tooth
  • M10 x 50mm Flange Screw
The Doffer Drive Assembly Parts:

  • M30 Nylon Lock Nut
  • Washer – 1-3/16” x 2-1/4” x .120”
  • 20 Tooth Doffer Drive Spur Gear
  • Snap Ring
  • Bearing For Doffer Adjustment
  • Adjuster Bearing Housing
  • 53 Tooth Spur Gear – Steel For Increased Durability – Not Powdered Metal
  • M6 x 16 Screw (3 rqd)
  • Drive shaft
  • ¼” Hardened Key
  • 3/8 x 7/8” Spring Pin (3 rqd)
  • Assembled Drive shaft – Ready To Install
  • Cast Iron Housing
  • M10 x 20 Flange Bolt
  • Bearing Cap

Keeping Everything in Stock

The parts and accessories listed for the upper doffer adjustment housing and sprockets assembly are available in the Certi-Pik, USA warehouse’s inventory and are in stock. All the parts match the OEM, so there is no need for drilling and no worries about interchangeable parts that don’t fit. Pro and In-Line parts are in stock along with metal panels, other specialty parts like the CTX doors, and high-quality, cutting-edge parts. Hardware, accessories, springs, extensions, and scrapping plates are listed under the diagrams of small parts that make up each component.
Some importance should be place on making sure that all the equipment needed for harvesting is tested before the harvesting season begins. Any machine can break at any moment and shut down the harvesting operation. It doesn’t take much to stop the components from working correctly. One tiny piece can fail and stop the component from working or break it completely. Certi-Pik, USA keeps even the most minor pieces around and can have them ready in little to no time, so the farmer or the mechanic can fix the machinery and the farmer can continue the harvest.

Ordering from Certi-Pik, USA

Part numbers are essential when it comes to ordering them. Without the part number, there is a chance of delivering the wrong part because some look the same but are made for different locations. All it takes is to contact customer service with the part number. They can locate the part quickly and have it shipped the same day. In many cases, they can have it delivered the next day at the customer’s request.

John Deere Upper Doffer Adjustment Housing and Sprockets Assembly

Picking Unit System

1.1 – #00852P

Description: NUT – 7/8 – HEX (9900-9965)
OEM Part: 14H852
Section: Picking Unit System
John Deere Upper Doffer Adjustment Housing and Sprockets Assembly
Picking Unit System

1.2 – #77146P

Description: PRO UPPER DOFFER ADJUSTMENT NUT – M24 (9970-7760)
OEM Part: N277146
Section: Picking Unit System
John Deere Upper Doffer Adjustment Housing and Sprockets Assembly
Picking Unit System

2.1 – #14205

Description: HOUSING – UPPER DOFFER ADJUSTMENT (9900-9965) (ILL.)
OEM Part: N114205
Section: Picking Unit System
John Deere Upper Doffer Adjustment Housing and Sprockets Assembly
Picking Unit System

2.2 – #75853

Description: PRO UPPER DOFFER ADJUSTMENT HOUSING (9970-7760)
OEM Part: N275853
Section: Picking Unit System
John Deere Upper Doffer Adjustment Housing and Sprockets Assembly
Picking Unit System

3 – #75931P

Description: SHIM – HOUSING – REPLACES # N34164 & N275931
OEM Part: N275931
Section: Picking Unit System
John Deere Upper Doffer Adjustment Housing and Sprockets Assembly
Picking Unit System

4.1 – #95284

Description: ADJUSTER (9900-9965) (ILL.)
OEM Part: N195284
Section: Picking Unit System
John Deere Upper Doffer Adjustment Housing and Sprockets Assembly
Picking Unit System

4.2 – #75743

Description: PRO DOFFER ADJUSTER (9970-7760)
OEM Part: N375743
Section: Picking Unit System
John Deere Upper Doffer Adjustment Housing and Sprockets Assembly
Picking Unit System

5 – #43026P

Description: SNAP RING (9900-7760)
OEM Part: P43026
Section: Picking Unit System
John Deere Upper Doffer Adjustment Housing and Sprockets Assembly
Picking Unit System

6 – #09467P

Description: BEARING – UPPER DOFFER (9900-7760) / PRO LOWER IDLER
OEM Part: JD9467
Section: Picking Unit System
John Deere Upper Doffer Adjustment Housing and Sprockets Assembly
Picking Unit System

7 – #23156P

Description: SNAP RING (9900-7760)
OEM Part: N123156
Section: Picking Unit System
John Deere Upper Doffer Adjustment Housing and Sprockets Assembly
Picking Unit System

8.1 – #95726

Description: SPACER – (9935-9965 IN-LINE ONLY)
OEM Part: N195726
Section: Picking Unit System
John Deere Upper Doffer Adjustment Housing and Sprockets Assembly
Picking Unit System

8.2 – #77150

Description: PRO UPPER DOFFER SPACER (9970-7760)
OEM Part: N277150
Section: Picking Unit System
John Deere Upper Doffer Adjustment Housing and Sprockets Assembly
Picking Unit System

9 – #90918

Description: SPROCKET – CHAIN SPROCKET (9910-9965 CONV. ONLY)
OEM Part: N190918
Section: Picking Unit System
John Deere Upper Doffer Adjustment Housing and Sprockets Assembly
Picking Unit System

10.1 – #13170

Description: LINK CHAIN – DOFFER DRIVE, 62 LINKS, 12-BAR (9900-9965)
OEM Part: AN113170
Section: Picking Unit System
John Deere Upper Doffer Adjustment Housing and Sprockets Assembly
Picking Unit System

10.2 – #13171

Description: LINK CHAIN – DOFFER DRIVE, 75 LINKS, 16-BAR (9900-9910)
OEM Part: AN113171
Section: Picking Unit System
John Deere Upper Doffer Adjustment Housing and Sprockets Assembly
Picking Unit System

11.1 – #97456

Description: GEAR – SPUR (9935-9965 IN-LINE ONLY) 19 TOOTH
OEM Part: N197456
Section: Picking Unit System
John Deere Upper Doffer Adjustment Housing and Sprockets Assembly
Picking Unit System

11.2 – #73954

Description: PRO UPPER DOFFER SPUR GEAR – 20 TOOTH (9970-7760)
OEM Part: N273954
Section: Picking Unit System
John Deere Upper Doffer Adjustment Housing and Sprockets Assembly
Picking Unit System

12.1 – #90169

Description: SHAFT – HEX DOFFER DRIVE (9900-9965) (ILL.)
OEM Part: AN190169
Section: Picking Unit System
John Deere Upper Doffer Adjustment Housing and Sprockets Assembly
Picking Unit System

12.2 – #73484

Description: PRO HEX DOFFER DRIVE (9970-7760)
OEM Part: AN273484
Section: Picking Unit System
John Deere Upper Doffer Adjustment Housing and Sprockets Assembly
Picking Unit System

13.1 – #00316P

Description: PIN – 1/4 X 1-1/2 SPRING PIN (9900-9965)
OEM Part: 34H316
Section: Picking Unit System
John Deere Upper Doffer Adjustment Housing and Sprockets Assembly
Picking Unit System

13.2 – #00385P

Description: PIN – 1/4 X 1-3/4 SPRING PIN (PRO)
OEM Part: 34H385
Section: Picking Unit System
John Deere Upper Doffer Adjustment Housing and Sprockets Assembly
Picking Unit Cabinet

14 – #07786P

Description:BOLT – M10 X 30 – SMOOTH HEX FLANGE
OEM Part:19M7786
Section: Picking Unit System
John Deere Upper Doffer Adjustment Housing and Sprockets Assembly
Picking Unit Cabinet

15 – #63526P

Description: NUT – M10 – SERR HEX FLANGE
OEM Part:E63526
Section: Picking Unit System
John Deere Upper Doffer Adjustment Housing and Sprockets Assembly
07291p Watermark

16 – #07291P

Description: FLANGE NUT : M16
OEM Part: 14M7291
Section: Picking Unit System
John Deere Upper Doffer Adjustment Housing and Sprockets Assembly
01373p Watermark

17 – #01373P

Description:WASHER – 21/32″ X 1-9/16″ X 0.180″
OEM Part: 24H1373
Section: Picking Unit System
John Deere Upper Doffer Adjustment Housing and Sprockets Assembly
73955 Watermark

18 – #73955

Description: SPUR GEAR – 25 TOOTH – DOFFER IDLER (F&R)
OEM Part:N273955
Section: Picking Unit System
John Deere Upper Doffer Adjustment Housing and Sprockets Assembly
JD Miscellaneous

19 – #72787P

Description: BEARING PRO – BOTTOM DRUM BEARING / DOFFER IDLER
OEM Part:AN272787
Section: Picking Unit System
John Deere Upper Doffer Adjustment Housing and Sprockets Assembly
20381 Watermark

20 – #20381

Description:SPACER – HEX – DOFFER IDLER – REPACES #N278451 (F&R)
OEM Part: KK20381
Section: Picking Unit System
John Deere Upper Doffer Adjustment Housing and Sprockets Assembly
07211p Watermark

21 – #07211P

Description: BOLT – M16 X 70 – DOFFER IDLER
OEM Part: 03M7211
Section: Picking Unit System
John Deere Upper Doffer Adjustment Housing and Sprockets Assembly
Picking Unit Cabinet

22 – #07190P

Description: BOLT – M10 X 20 ROUND HEAD – SQR NECK
OEM Part: 03M7190
Section: Picking Unit System
John Deere Upper Doffer Adjustment Housing and Sprockets Assembly
14761 Watermarked

23 – #14761

Description: BUSHING – TOP HEX – FINE DOFFER ADJUSTMENT (F&R)
OEM Part: KK14761
Section: Picking Unit System
John Deere Upper Doffer Adjustment Housing and Sprockets Assembly
20459 Copy

24 – #20459

Description: SPACER – TUBE – FINE DOFFER ADJUSTMENT (F&R)
OEM Part: KK20459
Section: Picking Unit System
John Deere Upper Doffer Adjustment Housing and Sprockets Assembly
03106p Watermark

25 – #03106P

Description: SPRING – FINE DOFFER ADJUSTMENT (F&R)
OEM Part: A3106R
Section: Picking Unit System
John Deere Upper Doffer Adjustment Housing and Sprockets Assembly
00265p Watermark

26 – #00265P

Description: SPRING PIN – 5/32″ X 15/16″
OEM Part: 34H265
Section: Picking Unit System
John Deere Upper Doffer Adjustment Housing and Sprockets Assembly
61197 Watermarked

27 – #61197

Description: HEX SHAFT – HEAT TREATED – FINE DOFFER ADJUSTMENT (F&R)
OEM Part: KK61197
Section: Picking Unit System
John Deere Upper Doffer Adjustment Housing and Sprockets Assembly
13518 Watermarked

28 – #13518

Description: HUB – TOP CLUTCH – HEX BORE – FINE DOFFER ADJUSTMENT – HEAT TREATED STEEL FOR INCREASED DURRABILITY : NOT POWDERED METAL (F&R)
OEM Part: KK13518
Section: Picking Unit System
John Deere Upper Doffer Adjustment Housing and Sprockets Assembly
20391 Watermark

29 – #20391

Description: RETAINER – BOTTOM CLUTCH – ROUND BORE – FINE DOFFER ADJUSTMENT -LONGER HEX FOR FULL PLATE ENGAGMENT – HEAT TREATED STEEL FOR INCREASED DURRABILITY: NOT POWDERED METAL (F&R)
OEM Part: KK20391
Section: Picking Unit System
John Deere Upper Doffer Adjustment Housing and Sprockets Assembly
20346 Watermarked

30 – #20346

Description: PLATE – FRONT – FINE DOFFER ADJUSTMENT
OEM Part: KK20346
Section: Picking Unit System
John Deere Upper Doffer Adjustment Housing and Sprockets Assembly
20347 Watermark

31 – #20347

Description: PLATE – REAR – FINE DOFFER ADJUSTMENT
OEM Part: KK20347
Section: Picking Unit System
John Deere Upper Doffer Adjustment Housing and Sprockets Assembly
07375p Watermark

32 – #07375P

Description: WASHER – 25 X 36 X 2mm
OEM Part: 24M7375
Section: Picking Unit System
John Deere Upper Doffer Adjustment Housing and Sprockets Assembly
49513 Watermarked

33 – #49513

Description: BUSHING – STRONGER STEEL HEX SPACER – FINE DOFFER ADJUSTMENT (F&R)
OEM Part: KK49513
Section: Picking Unit System
John Deere Upper Doffer Adjustment Housing and Sprockets Assembly
20450 Watermark

34 – #20450

Description: SPUR GEAR – 25 TOOTH – DOFFER IDLER – STEEL FOR INCREASED DURRABILITY : NOT POWDERED METAL (F&R)
OEM Part: KK20450
Section: Picking Unit System
John Deere Upper Doffer Adjustment Housing and Sprockets Assembly
07806p Watermark

35 – #07806P

Description: SCREW – M10 X 50 – FINE DOFFER ADJUSTMENT
OEM Part: 19M7806
Section: Picking Unit System
John Deere Upper Doffer Adjustment Housing and Sprockets Assembly
Air System

36 – #75038P

Description: NUT – PRO – M30 NYLON LOCK NUT
OEM Part: N275038
Section: Picking Unit System
John Deere Upper Doffer Adjustment Housing and Sprockets Assembly
01262p Watermark

37 – #01262P

Description: WASHER – 1-3/16″ X 2.25″ X 0.120″
OEM Part: 24H1262
Section: Picking Unit System
John Deere Upper Doffer Adjustment Housing and Sprockets Assembly
12107 Watermarked

38 – #12107

Description: SPUR GEAR – 20 TOOTH – DOFFER DRIVE – FINE DOFFER ADJUSTMENT (F&R)
OEM Part: KK12107
Section: Picking Unit System
John Deere Upper Doffer Adjustment Housing and Sprockets Assembly
71921p Watermark

39 – #71921P

Description: SNAP RING – FINE DOFFER ADJUSTMENT (F&R)
OEM Part: N71921
Section: Picking Unit System
John Deere Upper Doffer Adjustment Housing and Sprockets Assembly
08524p Watermark

40 – #08524P

Description: BEARING – ADJUSTER – FINE DOFFER AJUSTMENT (F&R)
OEM Part: JD8524
Section: Picking Unit System
John Deere Upper Doffer Adjustment Housing and Sprockets Assembly
81096 Watermark

41 – #81096

Description: ADJUSTER BEARING HOUSING – FINE DOFFER AJUSTMENT – REPLACES #KK14726 & KK25634 & KK63795 (F&R)
OEM Part: KK81096
Section: Picking Unit System
John Deere Upper Doffer Adjustment Housing and Sprockets Assembly
17491 Watermarked

42 – #17491

Description: SPUR GEAR – 53 TOOTH – FINE DOFFER ADJUSTMENT – STEEL FOR INCREASED DURRABILITY : NOT POWDERED METAL (F&R)
OEM Part: KK17491
Section: Picking Unit System
John Deere Upper Doffer Adjustment Housing and Sprockets Assembly
08553p Watermark

43 – #08553P

Description: SCREW – M6 X 16
OEM Part: 19M8553
Section: Picking Unit System
John Deere Upper Doffer Adjustment Housing and Sprockets Assembly
35513 Watermarked

44 – #35513

Description: DRIVE SHAFT – FINE DOFFER ADJUSTMENT – REPLACES #AKK13695 (F&R)
OEM Part: AKK35513
Section: Picking Unit System
John Deere Upper Doffer Adjustment Housing and Sprockets Assembly
00103p Watermark

45 – #00103P

Description: SHAFT KEY – 1/4″ X 2-1/8″ – HARDENED
OEM Part: 26H103
Section: Picking Unit System
John Deere Upper Doffer Adjustment Housing and Sprockets Assembly
00347p Watermark

46 – #00347P

Description: SPRING PIN – 3/8″ X 7/8″
OEM Part: 34H347
Section: Picking Unit System
John Deere Upper Doffer Adjustment Housing and Sprockets Assembly
35513assy Watermark

47 – #35513ASSY

Description: ASSEMBLED DRIVE SHAFT – FINE DOFFER ADJUSTMENT, READY TO INSTALL – INCLUDES ITEMS #36-46’
OEM Part: 35513ASSY
Section:
John Deere Upper Doffer Adjustment Housing and Sprockets Assembly
45200 Watermark

48 – #45200

Description: HOUSING – FINE DOFFER ADJUSTMENT – (F&R)  – STEEL FOR INCREASED DURRABILITY : NOT POWDERED METAL
OEM Part: KK45200
Section: Picking Unit System
John Deere Upper Doffer Adjustment Housing and Sprockets Assembly
Picking Unit Cabinet

49 – #75620P

Description: BOLT – M10 X 20 – SERR HEX FLANGE – GD 8 – NOT THREAD FORMING
OEM Part: N275620
Section: Picking Unit Cabinet
John Deere 9976-CP690 Lower Cabinet, Posts, and Doors
47217p

50 – #47217P

Description: BEARING CAP – FINE DOFFER ADJUSMENT HOUSING PLUG
OEM Part: A47217
Section: Picking Unit System
John Deere Upper Doffer Adjustment Housing and Sprockets Assembly