Switch — fits 13 New Holland models — MT40339438

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Switch — fits 13 New Holland models — MT40339438

Part #MT40339438 No reviews yet — be the first Find it in 18 parts diagrams

Fits: New Holland BOOMER-40, New Holland BOOMER-45, New Holland BOOMER-50, New Holland BOOMER-55, New Holland BOOMER-35 + 8 more

About this item

Genuine New Holland OEM part — direct factory replacement
Fits: New Holland BOOMER-40, New Holland BOOMER-45, New Holland BOOMER-50, New Holland BOOMER-55, New Holland BOOMER-35 + 8 more
Opens or closes the control circuit

New Holland
MT40339438
AG
ELECTRICAL
SWITCH
all 8 specs

Replaces: 87277803; MT40303187; why →

$57.37/ each · USD

In Stock – in store

local pickup same day

usually ships same day

Free shipping on parts orders $75+

To the 48 contiguous states, with a CROP account.

Qty

Ships from Clinton Tractor, Clinton NY

OEM parts

30-day returns · see policy

Sold & shipped by Clinton Tractor & Implement Co.

Authorized New Holland dealer · since 1953

$57.37/ each · USD

In Stock – in store

local pickup same day

usually ships same day

Free shipping on parts orders $75+

To the 48 contiguous states, with a CROP account.

Qty

Ships from Clinton Tractor, Clinton NY

OEM parts

30-day returns · see policy

Sold & shipped by Clinton Tractor & Implement Co.

Authorized New Holland dealer · since 1953

$57.37/ each · USD

In Stock – in store

local pickup same day

usually ships same day

Free shipping on parts orders $75+

To the 48 contiguous states, with a CROP account.

Qty

Ships from Clinton Tractor, Clinton NY

OEM parts

30-day returns · see policy

Sold & shipped by Clinton Tractor & Implement Co.

Authorized New Holland dealer · since 1953

$57.37/ each · USD

In Stock – in store

local pickup same day

usually ships same day

Free shipping on parts orders $75+

To the 48 contiguous states, with a CROP account.

Qty

Ships from Clinton Tractor, Clinton NY

OEM parts

30-day returns · see policy

Sold & shipped by Clinton Tractor & Implement Co.

Authorized New Holland dealer · since 1953

Overview

Product description

Fits the New Holland BOOMER-55 and BOOMER-35 — this switch opens or closes the control circuit. Cataloged for 13 New Holland models across 2 series.

Specifications

Technical specifications

8 attributes

Part type: Switch
Fits: 13 New Holland models
Brand: New Holland
Part number (MPN): MT40339438
SKU: CT-NHL-MT40339438
Category: ELECTRICAL
Part Number: MT40339438
Division: AG

Fit & diagrams

Compatibility

Will it fit your machine?

Type your model to confirm it fits — or browse the full compatibility list below.

Equipment models this part fits
Model	Series
BOOMER-55	BOOMER
BOOMER-35	BOOMER
BOOMER-40	BOOMER
BOOMER-45	BOOMER
BOOMER-50	BOOMER
WORKMASTER-25	WORKMASTER
BOOMER-37	BOOMER
BOOMER-41	BOOMER
BOOMER-47	BOOMER
WORKMASTER-25S	WORKMASTER
WORKMASTER-35	WORKMASTER
WORKMASTER-40	WORKMASTER
WORKMASTER-40C	WORKMASTER

Showing the first 10 of 13 compatible models — type your model above to jump straight to it.

Not sure it fits? Browse the full parts catalogue to check every listed part.

Parts diagrams

Find it in the exploded diagram

Every diagram this part appears in — jump straight to its callout, or browse the whole assembly. Each diagram opens with every part numbered, and each callout links back to its own part page.

New HollandSystemAssemblyThis part

Parts diagrams this part appears in
Assembly	Machine	Callout	Parts	View
Initial Stocking List (List B)	New Holland BOOMER-40 · Service & Maintenance	#90	0	View
Instrument Panel	New Holland BOOMER-55 · Electrical Systems	#4	15	View
Instrument Panel	New Holland BOOMER-35 · Electrical Systems	#4	15	View
Initial Stocking List	New Holland WORKMASTER-25 · General & Pictorial Index	#27	0	View
Instrument Panel	New Holland WORKMASTER-25S · Electrical Systems	#4	10	View
Initial Stocking List	New Holland WORKMASTER-25S · General & Pictorial Index	#26	0	View
Initial Stocking List (List B)	New Holland BOOMER-35 · Service & Maintenance	#56	0	View
Initial Stocking List (List B)	New Holland BOOMER-55 · Service & Maintenance	#89	0	View
Instrument Panel	New Holland WORKMASTER-35 · Electrical Systems	#9	13	View
Instrument Cluster	New Holland BOOMER-37 · Electrical Systems	#1	1	View
Electric Panel, Front Console	New Holland BOOMER-37 · Electrical Systems	#4	18	View
Panel, Meter	New Holland BOOMER-45 · Electrical Systems	#4	16	View
Meter, Panel	New Holland BOOMER-35 · Electrical Systems	#4	16	View
Meter Panel	New Holland BOOMER-55 · Electrical Systems	#4	16	View
Meter Panel, Servo Control	New Holland BOOMER-55 · Electrical Systems	#4	17	View
Initial Stocking List	New Holland WORKMASTER-40C · Service & Maintenance	#39	0	View
Initial Stocking List (List B)	New Holland WORKMASTER-25 · Service & Maintenance	#22	0	View
Instrument Panel	New Holland WORKMASTER-25 · Electrical Systems	#4	8	View

Older numbers

Older part numbers for this part

If your manual or an old invoice lists one of these, MT40339438 is the current number to order. The old numbers bring you to this page.

87277803
MT40303187

Machine specifications

Specs for the machines this part fits

Verified equipment data for the models in the compatibility list — match yours before ordering.

6 machines

Specifications for the machines this part fits
Specification	New Holland BOOMER-55	New Holland BOOMER-35	New Holland BOOMER-40	New Holland BOOMER-45	New Holland BOOMER-50	New Holland WORKMASTER-25
Weight	3,424–4,194 lbs	2,913 lbs	3,549 lbs	3,424–4,194 lbs	3,549 lbs	2,469 lbs
Rear PTO	independent	independent	independent	independent	independent	independent
3-pt hitch	I · 2,116 lbs lift	I	I	I · 2,116 lbs lift	I	I · 1,433 lbs lift
Fuel capacity	—	—	—	—	—	7.4 gal
Rear tires	13.6-24	—	—	13.6-24	—	—

Service & support

Questions

Frequently asked questions

Quick answers to what operators ask most before they order this part.

What equipment does New Holland part MT40339438 fit?
It fits 13 New Holland models, including the BOOMER-55, BOOMER-35, BOOMER-40 and 10 more.
Does part MT40339438 replace an older part number?
Yes — MT40339438 replaces 87277803, MT40303187.
Is New Holland part MT40339438 a genuine OEM switch?
Yes — MT40339438 is a genuine New Holland OEM switch, supplied new by Clinton Tractor.

Buyers & extras

Reviews

Ratings & reviews

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Part guide

New Holland MT40339438 switch — buyer's guide

~1 min read

New Holland MT40339438 is the switch Clinton Tractor supplies for this application. It is listed as fitting 13 New Holland models.

What MT40339438 fits

Fits: New Holland BOOMER-40, New Holland BOOMER-45, New Holland BOOMER-50, New Holland BOOMER-55, New Holland BOOMER-35 + 8 more. Commonly ordered for the BOOMER-55, BOOMER-35, BOOMER-40. If your machine isn't listed, check the serial number before ordering.

Which numbers it replaces

MT40339438 replaces 87277803, MT40303187. If your parts manual or the old box shows any of those numbers, this is the correct current replacement — no fitment change.

Switch — fits 13 New Holland models — MT40339438MT40339438 · $57.37

In Stock – in store

Switch — fits 13 New Holland models — MT40339438MT40339438 · $57.37

In Stock – in store

$57.37In Stock – in store