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SKU:
NLT1U00022
Ships for free in 2–4 business days.
New Holland Boomer T and TC Tractor Ignition Switch 86405634 86405635 87577812
$57.99
In Stock
$57.99
Sale price
$57.99
Regular price
This new aftermarket ignition key switch with key is intended for the compatible models and reference numbers shown below. It cross-references 86405634, 86405635, 87577812, 86400226.
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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
- New Holland Boomer 2030
- New Holland Boomer 2035
- New Holland Boomer 3040
- New Holland Boomer 3045
- New Holland Boomer 3050
- New Holland T2210
- New Holland T2220
- New Holland T2310
- New Holland T2320
- New Holland T2330
- New Holland TC25
- New Holland TC25D
- New Holland TC29
- New Holland TC29D
- New Holland TC29DA
- New Holland TC31DA
- New Holland TC33
- New Holland TC33D
- New Holland TC33DA
- New Holland TC34DA
- New Holland TC35
- New Holland TC35A
- New Holland TC35D
- New Holland TC35DA
- New Holland TC40
- New Holland TC40A
- New Holland TC40D
- New Holland TC40DA
- New Holland TC45
- New Holland TC45A
- New Holland TC45D
- New Holland TC45DA
Product Overview
If the dash goes dead when the key is moved, the starter works only at certain key angles, or the tractor stalls when the switch is bumped, worn internal contacts may be the cause after power and wiring are verified.
This keyed ignition switch replaces four New Holland references across compatible Boomer, T, and TC tractors. It uses a three-position, four-terminal layout; serial number and connector arrangement can still change fitment.
Key Features & Performance
- Restores key-controlled run and start circuits
- Three switch positions
- Four electrical terminals
- Key included
- Broad compact-tractor coverage
Replaces Part Numbers
- 86405634
- 86405635
- 87577812
- 86400226
Common Uses
- Repairing intermittent starting
- Replacing a loose or physically damaged key switch
- Restoring dash and accessory power
- Theft-damage or lost-key service when the switch is affected
Technical Specifications
- Product Type: Ignition key switch
- Positions: 3
- Terminals: 4
- Condition: New
- Replacement Type: Aftermarket
Installation & Fitment
- Disconnect the battery before reaching behind the dash
- Transfer one terminal at a time or label the harness
- Compare terminal letters and connector arrangement
- Inspect heat-damaged terminals before connecting the new switch
- Confirm off, run, and start operation
Compatibility Notice
Northline Parts does its best to list all known compatible models, but the correct part may fit an application not shown.
Model, production date, serial number, dimensions, electrical or mounting configuration, installed options, and previous repairs can affect fitment. Compare the removed part and equipment information before purchase.
Frequently Asked Questions
Q: Can a worn ignition switch make the tractor stall? A: Yes. Worn run contacts can interrupt ignition or fuel-control power, though loose wiring and safety circuits can cause the same symptom.
Q: Are keys included? A: Yes. This switch is supplied as a keyed replacement; review package photos for the key quantity.
Q: How do I confirm fitment before ordering? A: Match the original reference number, equipment model and serial number, dimensions, connector or mounting details, and the product photos. Pay close attention to any listed serial breaks.
Q: Is this made by the original equipment manufacturer? A: No. This is a new aftermarket part. Brand names and model numbers are used only to identify compatible equipment.
Part Summary
keywords: New Holland 86405634 ignition switch, 86405635 key switch, 87577812 tractor ignition, 86400226 switch replacement, Boomer tractor no start, TC45 ignition switch
Brand names, model numbers, and reference part numbers are used for identification and compatibility purposes only. Verify the original component, dimensions, and application before purchase.