Jacobsen
Front-Engine Lawn Tractor

Model # LT12 Official Jacobsen lawn tractor

Here are the diagrams and repair parts for Official Jacobsen LT12 lawn tractor, as well as links to manuals and error code tables, if available.

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Model diagram and schematic

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Showing 10 of 225 parts  |

Washer JA-45200-6
#8

Lift, brake and clutch linkage diagram

Washer

Part #JA-45200-6

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

Pin JA-46138-7
#12

Steering linkage diagram

Pin

Part #JA-46138-7

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

Panel JA-99310-2
#8

Control panel, battery and gas tank diagram

Panel

Part #JA-99310-2

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

Bolt JA-37608-5
#39

Steering linkage diagram

Bolt

Part #JA-37608-5

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

Bushing JA-34613-3
#15

Steering linkage diagram

Bushing

Part #JA-34613-3

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

Nut JA-44310-2
Nut

Part #JA-44310-2

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

Washer 84011
#24

Lift, brake and clutch linkage diagram

Washer

Part #84011

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

Pulley JA-33622-2
#45

Frame transaxle and engine diagram

Pulley

Part #JA-33622-2

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

Screw JA-40390-8
#6

Cowlings, rear fender and seat assembly diagram

Screw

Part #JA-40390-8

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

Flat Washer JA-45700-5
#47

Cowlings, rear fender and seat assembly diagram

Flat washer

Part #JA-45700-5

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

Most common symptoms to help you fix your riding mowers & tractors

Choose a symptom to see related riding mower and lawn tractor repairs.

Main causes: dead battery, stale fuel, bad starter solenoid, ignition system problem, bad ignition interlock switch, clo…

Main causes: engine overfilled with oil, leaky head gasket or sump gasket, damaged carburetor seals, cracked fuel pump, …

Main causes: damaged cutting blade, worn deck pulley, damaged mandrel pulley, loose fasteners on mower deck components…

Main causes: shift lever needs adjustment, neutral control needs adjustment…

Main causes: damaged tie rods, bent or worn wheel spindle, worn front axle, damaged sector gear assembly…

Main causes: worn or broken blade belt, broken belt idler pulley, blade clutch cable failure, bad PTO switch, damaged ma…

Main causes: worn or broken ground drive belt, bad seat switch, transaxle freewheel control engaged, transaxle failure, …

Main causes: clogged carburetor, damaged flywheel key, dirty spark plug, stale fuel, improper valve lash, engine needs a…

Main causes: faulty battery, bad alternator…

Most common repair guides to help fix your riding mowers & tractors

These step-by-step repair guides will help you safely fix what’s broken on your riding mower or lawn tractor.

How to replace the seat on a riding lawn mower

How to replace the seat on a riding lawn mower

A broken seat can keep the mower from running.…

Repair difficulty
Time required
 15 minutes or less
How to replace a riding lawn mower fuel filter

How to replace a riding lawn mower fuel filter

Help your mower run better by replacing the fuel filter during your riding mower's annual tune-up.…

Repair difficulty
Time required
 15 minutes or less
How to replace a riding lawn mower rear tire

How to replace a riding lawn mower rear tire

Your mower can’t run on a damaged rear tire. Here’s how to install a new one.…

Repair difficulty
Time required
 60 minutes or less

Effective articles & videos to help repair your riding mowers & tractors

Use the advice and tips in these articles and videos to get the most out of your riding mower or lawn tractor.

How to remove a lawn mower blade using a removal tool

How to remove a lawn mower blade using a removal tool

Learn how a blade removal tool makes replacing the blade easier and safer…

Charging a battery in a riding lawn mower video

Charging a battery in a riding lawn mower video

Learn how to use a battery charger if your mower battery is dead.…

Riding mower and tractor common questions

Riding mower and tractor common questions

You might find the answers to your questions about your riding mower or lawn tractor in this list of frequently asked qu…