Jacobsen Tri King Triplex Mower User Manual (English)

Questions and Answers:

J
Julie MooreAug 14, 2025
Why won't my Jacobsen Tri King Triplex Mower engine start?
- J
  johnwestAug 14, 2025
  If your Jacobsen Lawn Mower engine won't start, several factors could be at play. First, ensure that the parking brake is engaged, the traction pedal is in Neutral, and the reel/3WD switch is off, as the operator back-up system might be preventing ignition. Next, check the battery's charge and connections. A low or defective battery can hinder starting. Also, verify the fuel tank isn't empty or filled with dirty fuel; if so, replenish with fresh fuel, change the fuel filter, and bleed the fuel lines. Lastly, inspect the fuse and replace it if it's blown.
L
Lacey MurrayAug 17, 2025
How to troubleshoot a Jacobsen Tri King Triplex Mower Lawn Mower engine that's hard to start?
- A
  adam62Aug 17, 2025
  If your Jacobsen Lawn Mower engine is hard to start or runs poorly, there are a few things you can check. Start by ensuring you have enough fresh fuel and that the fuel filter isn't dirty. If the fuel level is low, replenish it with fresh fuel, change the fuel filter, and bleed the fuel lines. Also, inspect the air filter and replace it if it's dirty. For issues related to the injectors or fuel pump, or if you suspect a more general engine problem, consult the engine manual.
E
Elizabeth CarterAug 21, 2025
Why is my Jacobsen Lawn Mower engine overheating?
- B
  Brenda CarrollAug 21, 2025
  If your Jacobsen Lawn Mower engine is overheating, start by checking the coolant level and adding coolant if it's low. Make sure the cooling air intake isn't restricted by cleaning it. Inspect the water pump belt and tighten or replace it if it's broken or loose. Finally, consider whether the engine is overloaded and reduce the forward speed if necessary.
P
Peter DavisAug 25, 2025
How to fix a Jacobsen Lawn Mower battery that won't hold charge?
- T
  taylorvickiAug 26, 2025
  If your Jacobsen Lawn Mower battery isn't holding a charge, begin by inspecting the battery terminals for looseness or corrosion and clean them if needed. Check the electrolyte level and refill it to the correct level if it's low. Next, examine the alternator belt and tighten or replace it if it's loose or broken. If these steps don't resolve the issue, the charging system may be defective, consult the engine manual.
J
justinwilliamsAug 28, 2025
What to do if my Jacobsen Tri King Triplex Mower engine stops suddenly?
- J
  Justin NunezAug 28, 2025
  If your Jacobsen Lawn Mower engine stops unexpectedly, the first thing to check is the fuel tank. If it's empty, refill it with fresh fuel and bleed the fuel lines. Also, make sure the interlocks are properly set before you leave the operator’s seat. Engage the parking brake, move the traction lever to “N”, and set the reel control to OFF.
E
Emily ChristianAug 31, 2025
Why do the reels on my Jacobsen Lawn Mower cut unevenly?
- N
  Noah RosalesAug 31, 2025
  If your Jacobsen Lawn Mower reels cut unevenly, start by inspecting the bedknife-to-reel adjustment. Also, check the engine speed and ensure that the engine is running at full throttle. Finally, verify the hydraulic oil level and fill the reservoir if needed.
C
christopher03Sep 3, 2025
What to do if my Jacobsen Tri King Triplex Mower does not react to traction pedal?
- K
  Kevin BrownSep 3, 2025
  If your Jacobsen Lawn Mower does not react to the traction pedal, make sure the parking brake is disengaged. Also, check that the tow valve is closed. Finally, verify the hydraulic oil level and fill the reservoir if needed.
G
Gabriel BarkerSep 7, 2025
Why isn't the implement on my Jacobsen Tri King Triplex Mower raising or lowering?
- R
  Ryan NelsonSep 7, 2025
  If the implement on your Jacobsen Lawn Mower does not raise or lower, check the hydraulic oil level and fill the reservoir as needed.
H
Heather BarrettSep 10, 2025
What causes the gauges/indicators to stop working on my Jacobsen Tri King Triplex Mower Lawn Mower?
- D
  Daniel WhiteSep 10, 2025
  If the gauges or indicators on your Jacobsen Lawn Mower are not operating, try resetting the circuit breaker and checking the bulb. Also, check the electrical connections for any loose wiring.

Jacobsen Tri King Triplex Mower Specifications

General

Cutting Width	72 inches
Drive Type	Hydrostatic
Number of Blades	3
Fuel Type	Gasoline
Transmission	Hydrostatic
Engine	Kohler CH740
Blade Type	Reel

Summary

Foreword and Suggested Stocking Guide

Foreword

Introduction to the manual, its purpose, and how to use it.

Suggested Stocking Guide

Recommendations for stocking commonly used maintenance items and ordering procedures.

Safety Information

1.1 Operating Safety

Essential safety rules and precautions for operating the machine safely.

1.2 Important Safety Notes

Definitions of DANGER, WARNING, CAUTION, NOTICE and critical safety interlock system information.

Specifications

2.1 Product Identification

Details on mower model, serial number plate, and product specifications.

2.2 Engine Specifications

Technical specifications for the Kubota diesel engine, including power, displacement, and fuel type.

2.3 Cutting Units

Specifications for reel type, diameter, bearings, and cutting width options.

2.4 Mower Specifications

Mower specifications including tires, pressure, battery, parking brake, and speed.

2.5 Weights and Dimensions

Physical dimensions and weight of the mower, including length, height, and width.

2.6 Accessories & Support Literature

List of available accessories, rollers, and support literature for the mower.

Adjustments Procedures

3.1 General Adjustment Guidelines

General guidelines for performing adjustments and maintenance safely.

3.3 Pump Drive Belt Adjustment

Procedure for adjusting the reel pump drive belt tension.

3.7 Traction Pedal Neutral Adjustment

Adjusting traction pedal spring tension to prevent mower creep when idle.

3.13 Reel to Bedknife Check

Pre-adjustment check for reel bearings, blades, and bedknife condition.

3.14 Reel to Bedknife Adjustment

Procedure for adjusting the reel to bedknife gap for optimal cutting.

3.15 Cutting Modes

Explanation of Fixed and Floating modes and how to convert between them.

3.16 Cutting Height Adjustment

Procedure for adjusting the mower cutting height in Fixed or Floating modes.

3.20 Torque Specification

Charts detailing torque specifications for standard and metric fasteners.

Maintenance Procedures

4.1 General Maintenance Guidelines

General guidelines and precautions for performing maintenance tasks safely.

4.2 Engine Maintenance

Information on engine break-in, maintenance schedule, and referencing the engine manual.

4.3 Engine Oil

Procedure for checking and changing engine oil, including recommended oil types and intervals.

4.4 Air Filter Service

Instructions for checking and replacing the air filter element using the service indicator.

4.7 Battery Service

Safety precautions and procedures for servicing the battery, including connections and cleaning.

4.10 Hydraulic Hoses

Precautions for inspecting and handling hydraulic hoses to prevent contamination and injury.

4.11 Hydraulic Oil

Procedure for draining, refilling, and checking the hydraulic oil level.

4.16 Wheel Mounting Procedure

Procedure for safely mounting wheels onto the mower hubs.

4.19 Backlapping

Procedure for backlapping the reels to restore cutting edge sharpness.

4.20 Storage Preparation

Instructions for preparing and storing the mower, battery, and engine for extended periods.

Troubleshooting Guide

5.1 General Troubleshooting

Troubleshooting chart for common problems during start-up and operation.

Maintenance & Lubrication Charts

6.1 General Lubrication Guidelines

General guidelines for lubrication, including cleaning fittings and using appropriate lubricants.

6.2 Lubrication Chart

Diagram and list of lubrication points and their recommended intervals.

6.3 Maintenance Charts

Recommended service and lubrication intervals for various mower components.

Parts Catalog Index

7.1 Table of Contents

Index of parts sections, listing components and their corresponding page numbers.

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