Model # TB4000 Official Troybilt trimmer

Here are the diagrams and repair parts for Official Troybilt TB4000 trimmer, as well as links to manuals and error code tables, if available.

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Owner’s manual

Model diagram and schematic

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ALL PARTS

Showing 10 of 155 parts |

Engine parts diagram

Push rod

Part #181033

The manufacturer no longer makes this part, and there's no substitute part

#38B

Boom and trimmer diagram

Strap

Part #682075

The manufacturer no longer makes this part, and there's no substitute part

#16

Engine parts diagram

Gasket

Part #181001

The manufacturer no longer makes this part, and there's no substitute part

#54

Engine parts diagram

Spacer

Part #181731

The manufacturer no longer makes this part, and there's no substitute part

#90

Engine parts diagram

Rope guide

Part #182122

The manufacturer no longer makes this part, and there's no substitute part

#87

Engine parts diagram

Spring

Part #181739

The manufacturer no longer makes this part, and there's no substitute part

#85

Engine parts diagram

Rope

Part #181742

The manufacturer no longer makes this part, and there's no substitute part

Cam Bracket Assembly (includes 26-29) 182125

#30

Engine parts diagram

Cam bracket assembly (includes 26-29)

Part #182125

The manufacturer no longer makes this part, and there's no substitute part

Line Trimmer Air Cleaner Assembly 182111

#45

Engine parts diagram

Line trimmer air cleaner assembly

Part #182111

The manufacturer no longer makes this part, and there's no substitute part

#12

Engine parts diagram

Spring

Part #181038

The manufacturer no longer makes this part, and there's no substitute part

Symptoms for gas line trimmers

Choose a symptom to see related grass line trimmer repairs.

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Why won't my gas line trimmer start?

Main causes: stale fuel, cracked fuel lines, dirty carburetor, bad spark plug, worn piston rings…

Why does my gas line trimmer run rough?

Main causes: stale fuel, clogged fuel filter, faulty spark plug, clogged air filter, cracked fuel lines, clogged carbure…

Why does my gas line trimmer leak gas?

Main causes: cracked fuel lines, bad carburetor seals, leaky fuel tank cap, damaged fuel tank…

Repair guides for gas line trimmers

These step-by-step repair guides will help you safely fix what’s broken on your grass line trimmer.

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How to rebuild a line trimmer carburetor

If the line trimmer engine won't start even though there's fuel in the tank, the carburetor could be the problem. Follow…

Repair difficulty

Time required

15 minutes or less

How to replace a line trimmer carburetor

If the line trimmer won't start even though there's fuel in the tank, the carburetor could be the problem. Follow these …

Repair difficulty

Time required

15 minutes or less

How to replace a line trimmer fuel line

The fuel line on a grass line trimmer deteriorates with time and eventually can split or crack. You can replace it yours…

Repair difficulty

Time required

15 minutes or less

Articles and videos for gas line trimmers

Use the advice and tips in these articles and videos to get the most out of your grass line trimmer.

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Top 10 electric lawn and garden tools for 2023

Model # TB4000 Official Troybilt trimmer

Model diagram and schematic

SEARCH WITHIN THIS MODEL

Symptoms for gas line trimmers

Why won't my gas line trimmer start?

Why does my gas line trimmer run rough?

Why does my gas line trimmer leak gas?

Repair guides for gas line trimmers

How to rebuild a line trimmer carburetor

How to replace a line trimmer carburetor

How to replace a line trimmer fuel line

Articles and videos for gas line trimmers

Top 10 electric lawn and garden tools for 2023

How to enjoy all the online benefits we offer on our Sears PartsDirect website

Grass line trimmer maintenance checklist

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