KEY-OPERATED LIGHTING CONTACTOR FOR JOHN DEERE AL9890

AL9890 Key-Operated Lighting Switch for Case, Deutz, and John Deere Tractors

The AL9890 lighting switch is a control component designed for the lighting circuit of compatible Case, Deutz, and John Deere tractors. It comes with 2 keys and can also be identified by its 26 mm mounting opening. This part number is suitable when you are looking for a replacement key-operated switch with clearly defined lighting positions.
Original part numbers: AL9890 - Z44576 - AL19890 - 3136852R1 - AL35864

Lighting Control via Sequential Positions

This switch allows you to cycle through the positions to control the tractor’s lighting. The positions are:

• parking light
• neutral
• parking light
• low beam
• high beams

On this type of part, wear on the cylinder, internal contacts, or the key can cause the lights to operate erratically. Replacing it with an identical part restores consistent control of the positions shown on the dashboard or the relevant console.

Practical guidelines for identifying the correct part number

To select this model, first compare part number AL9890 with the part you’re replacing. Other comparable part numbers associated with this part include: Z44576, AL19890, 3136852R1, and AL35864. These reference numbers are useful if your old contactor has different markings or if you’re working from a known equivalent in the workshop.

The second key factor is the mounting hole diameter. Here, the value to note is 26 mm. This dimension helps avoid a common mistake when comparing contactors that look similar but are designed for different hole sizes.

Documented Agricultural Applications

This part number is documented for Case, Deutz, and John Deere tractors. You’ll find it in particular on widely used agricultural series, as well as on certain specific models such as the V, N, S, or Intrac versions when indicated in the detailed compatibility information on the product sheet.

The complete list of compatible models must be used exactly as provided at the time of verification, especially if your tractor has a variant suffix. Two machines from the same family may use different contactors depending on their electrical equipment or control panel generation.

What to Check Before Replacement

Before ordering, check the part number marked on the existing component, the number and sequence of the relevant positions on your tractor, and the 26 mm mounting opening. The inclusion of two keys simplifies replacement when the old assembly is incomplete.

If you’re looking for this part for a John Deere, Case, or Deutz model listed here, carefully compare your old contactor and its markings. This is still the surest way to select the correct version.

Dimensions and Technical Specifications

• 26 mm

Compatibility by Make and Series

Case · Tractor

• 1046
• 1246
• 323
• 353
• 383
• 423
• 433
• 453
• 523
• 533
• 553
• 554
• 624
• 633
• 644
• 654
• 724
• 733
• 743
• 744
• 745S
• 824
• 833
• 844
• 844S
• 845
• 946

Deutz · Tractor

• 4007
• 4507
• 4807
• 5207
• 6007
• Intrac 2002
• Intrac 2003

John Deere · Tractor

• 1040
• 1040V
• 1140
• 1140V
• 1550
• 1640
• 1750
• 1750V
• 1,850
• 1850N
• 1850V
• 1950
• 1950N
• 2040
• 2040S
• 2140
• 2650
• 2850
• 3040
• 3050
• 3,140
• 3,350
• 3,640
• 3640S
• 3650
• 840
• 940
• 940V

JOHN DEERE

• 820
• 830
• 920
• 930
• 1020
• 1030
• 1035
• 1120
• 1130
• 4:30 p.m.
• 4:35 p.m.
• 6:30 p.m.
• 6:40 p.m.
• 2020
• 2030
• 2035
• 2130
• 2135
• 3030
• 3120
• 3130
• 3135

FAQ — Frequently Asked Questions

What is the AL9890 key switch used for?

This switch is used to control the lights in successive positions using a key. The source lists the following positions: parking lights, neutral, running lights, low beams, and high beams. It is therefore suitable for a lighting control system requiring a 26 mm mounting.

How can I check if this switch is compatible with my tractor?

The first step is to compare the part number AL9890 with the comparison part numbers Z44576, AL19890, 3136852R1, or AL35864. Next, verify the machine application listed in the product sheet and the 26 mm mounting hole diameter to confirm your selection.

Does this ignition switch come with keys?

Yes, this lock comes with 2 keys. This is helpful when replacing the lock, especially if the old lock cylinder is worn, if the original key is missing, or if you want to walk away with a complete, ready-to-install set.

On which tractor brands is this part number available?

This part number is listed for the following tractor brands Case, Deutz, and John Deere. A detailed list of compatible models is provided in the product description, along with the exact part designations to use when verifying compatibility to avoid confusion between similar variants.

The original replacement part numbers and brands are provided solely for comparison purposes. This does not imply that these are original parts.