John Deere 9935, 9965-CP690
Doffer Plug Sensor

JOHN DEERE 9935, 9965-CP690 DOFFER PLUG SENSOR

The Doffer plug sensor is a part of the John Deere cotton-harvesting equipment. The sensor allows the machine operator to monitor the picking zone in the picking unit while in the cab. The sensor will alert the operator to clean out the doffing area of the picking unit to ensure an unobstructed path for the cotton to be sucked into the suction doors. This is essential as it could prevent equipment failure and possible fires. The diagram within this link depicts different parts that are considered part of the Pro cabinet parts.

Each part of the machinery works together to pick the cotton, and maintenance keeps the parts lasting longer. The Owner’s Manual explains how to take care of each part of the machinery. It covers how to clean, grease the parts, and it details some important aspects of machine setup, operation, and maintenance.

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Pro Cabinet Parts

Certi-Pik, USA has a wide variety of aftermarket parts in stock, so the farmer can take the broken parts and fix or replace them themselves. They can trust that they can get the parts shipped to them in an appropriate amount of time, so they are not left experiencing downtime for too long.

The dealers often sell aftermarket parts from Certi-Pik, USA. This leaves farmers more options on how they want to get their parts for replacement.

The Doffer plug sensor is one of those parts that goes out and needs replacement. The doffer takes the cotton and removes it from the spindle barbs sending it past the sensor. Machines in this day and age have an increasing amount of sensors. Today’s technology has sensors for every machine, vehicle, and tractor. Sensors work like monitors to relay information from a part so it is able to perform at its best. When the sensor goes out, the part can break too.

Breaking Down the Parts of the Doffer Plug Sensor

There is good news for the farmer who needs a specific part regarding the doffer plug sensor. As mentioned, maintaining the sensors can help the machine to operate better as a whole. They can order one component of the plug sensor instead of the entire thing.

These are the parts of the sensor:

Doffer Plug Sensor Flap (Spindle 18)
Doffer Plug Sensor Flap (Spindle 20)
Short Square Neck M8 X 20 Round Head Bolt
Washer 1.0 X .343 X .06″
Top Lock Nut Bolt M8
Short Square Neck M8 X 16 Round Head Bolt
Washer .75 X .343 X .12″

Serrated Hex Flange Nut M8
Non-Metallic Shoulder Washer
Electrical Connector Terminal
Washer 17/32 X 1 X .120″
Washer 9/32 X 5/8 X .065″
Smooth Hex Screw M6 X 12 Flange, Thread Cutting

Can You Use Just Any Bolts, Nuts, or Washers?

The short answer is no, because there are different types of nuts and bolts that are made specifically for the use they are intended for. For example, there are several differing materials that nuts, bolts, screws, and washers are made from. There are various application specific sizes and material grades and hardness’s engineered to stand up to specific circumstances.

All of the bolts, nuts, and washers have different purposes. They exist to bringing together various, metals, and parts like sheet metal, castings, and machine parts to hold them in place.

Some bolts can tear apart the items combined. For example, metal bolts can tear plastics apart significantly if over-tightened. Due to material fatigue, bolts or other hardware can break, and washers can bend or wear out, defeating the purpose. Buying only the recommended parts and nuts and bolts from a trusted suppler can give the part its full potential when used on machinery. The last thing anyone wants is parts falling off of machinery worth thousands of dollars.

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Ordering from Certi-Pik, USA

There are a few things to keep in mind, whether the parts are for wholesale and retail or the farmer is purchasing the parts directly from Certi-Pik, USA. The part numbers are critical. The model numbers or parts numbers can make the sale and repairs go much smoother. Without them, it leaves customer service guessing and possibly delivering the wrong part, especially if there are multiple parts that are the same but not the exact size or fit.

If the part number is not visible on the part itself, try looking in the owner’s manual for more information. Customer service will also need to know the description and quantity of parts. The parts that are listed in our catalog each have a unique part number corresponding to the assembly drawing.