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SKU:
NLT1A01347
Ships for free in 2–4 business days.
Case IH D/DX Tractor Ignition Switch 86405634
$42.99
In Stock
$42.99
Sale price
$42.99
Regular price
This new aftermarket ignition key switch replaces Case IH 86405634, 87577812, 86400226, and 86405635 for compatible D35/D40/D45 and DX-series compact tractors.
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Compatible Models
We do our best to list all compatible models. Although this may be the part you need, your exact model may not appear below.
Compatible equipment / model
- Case IH D35, D40 and D45 tractors
- Case IH DX29, DX31, DX33, DX34, DX35, DX40 and DX45 tractors
- Case IH Farmall 31, 35, 40, 45 and 50 applications using switch 86405634
Product Overview
A key that jams, spins loosely, gives intermittent dash power, or will not send a start signal can indicate a worn switch. Battery connections, fuses, clutch and neutral interlocks, starter relay, and harness terminals should be tested before ordering.
The switch distributes keyed electrical power to the tractor start, run, and accessory circuits according to the original wiring. It must not be used to bypass safety interlocks.
Match the original number, key positions, connector shell, terminal count and pattern, mounting bezel, tractor model, and serial number. The same switch family also appears on New Holland tractors, but fit must be confirmed.
Key Features & Performance
- Keyed ignition and starter control for compatible Case IH tractors
- Replacement for worn electrical contacts or mechanical key damage
- Multiple Case IH and supplier references for comparison
- Direct dash-mount format when connector and bezel match
Replaces Part Numbers
- 86405634
- 87577812
- 86400226
- 86405635
- 84826-01
- Y26X-2309
Common Uses
- Correcting intermittent starting traced to the key switch
- Replacing a broken or jammed key cylinder
- Restoring reliable key-controlled dash and starter power
Technical Specifications
- Product Type: Tractor ignition key switch
- Compatible Brand: Case IH
- Primary Models: D35-D45 and DX29-DX45 families
- Condition: New aftermarket replacement
Installation & Fitment
- Disconnect the negative battery cable
- Photograph and label the harness connector
- Inspect plug cavities for heat or corrosion
- Mount the switch without twisting the harness
- Test start, run, shutdown, and all neutral and PTO interlocks
Compatibility Notice
Northline Parts does its best to list all known compatible models, but the correct part may fit an application that is not shown above. Model year, production date, serial number, engine or equipment specification, installed options, and previous repairs can change fitment. Match the original part, reference number, dimensions, connectors, mounting points, and product photos before purchase.
Frequently Asked Questions
Q: Can a bad switch make the tractor stall? A: It can if the RUN contact opens, but the fuel circuit, safety system, and wiring should also be inspected.
Q: Does it fit a New Holland TC40? A: The references are also used on some New Holland tractors, but this listing should be verified by original number and connector before purchase.
Q: Will model DX35 alone confirm fit? A: No. Check serial information and compare the installed switch.
Q: Is this an original-equipment part? A: No. This is a new aftermarket product. Brand names and part numbers are used only to identify compatible applications.
Part Summary
keywords: Case IH 86405634 ignition switch, DX35 tractor key switch replacement, 87577812 starter switch, Case D40 intermittent no start, Y26X-2309 aftermarket switch
Brand names, model numbers, and reference part numbers are used for identification and compatibility purposes only. Verify the original component, specifications, and application before purchase.