RHINO NITRO FN15 User Manual (English)

Questions and Answers:

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coffeyshannonAug 16, 2025
Why is my RHINO NITRO FN15 Brush Cutter vibrating so much?
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  Walter GomezAug 16, 2025
  Excessive vibrations in your RHINO Brush Cutter can stem from several issues. Start by checking and tightening any loose gearbox bolts, blade holder nuts, or blade nuts. Inspect the output shaft for bending and replace it if necessary. Ensure the blades can swing freely. Uneven blade wear can also cause vibrations; weigh the blades and ensure their weight is within 1 oz of each other. Replace both blades as a set. Other potential causes include a bent blade carrier (replace it), an improperly seated blade hub (remove, clean the tapered spline shaft, and replace the hub), mismatched new and worn blades or bolts (replace in sets), or incorrectly phased drivelines (replace drivelines). Also, ensure the implement and tractor yokes are aligned.
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William HaneyAug 19, 2025
Why is my RHINO NITRO FN15 not cutting grass properly?
- A
  Andrea GonzalesAug 19, 2025
  If your RHINO Brush Cutter isn't cutting effectively, start by sharpening or replacing dull blades. Ensure the blade rotation is correct for your carrier. Verify you're using the correct PTO speed and check the gearbox ratio if the carrier RPM is too low. Adjust the machine to ensure the cutter is level. Move the tires out of the cutter overlap area if they are mashing down the grass. Reduce ground speed if it's too fast. Free the blades if they are locked back, and replace worn blade bolts if the blades are riding up.
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Raymond AndersonAug 21, 2025
What to do if my RHINO NITRO FN15 gearbox is overheating?
- Y
  yvettebaldwinAug 21, 2025
  If the gearbox on your RHINO Brush Cutter is overheating, first check the lubricant level and fill it to the level plug if it's low. If the lubricant is the wrong type, replace it with NLGI 000 lubricant. Also, remove any excessive trash build-up around the gearbox. If these steps don't resolve the issue, the bearings or gears might be set up improperly, and you should consult your dealer.
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Lori HansonAug 25, 2025
How to fix a leaking gearbox on my RHINO NITRO FN15 Brush Cutter?
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  Frederick JonesAug 26, 2025
  If your RHINO Brush Cutter gearbox is leaking, the following steps can be taken: * Replace any damaged oil seals. * If the shaft is bent, replace both the oil seal and the shaft. * If the shaft is rough in the oil seal area, replace or repair the shaft. * Ensure the oil seal is installed correctly; if not, replace it. * If the oil seal isn't sealing in the housing, replace the seal or use a sealant on the outside of the seal. * If the oil level is too high, drain it to the proper level. * Replace any damaged gaskets and tighten any loose bolts. * If there is a sand hole in the casting, replace the castings or gearbox.
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Jennifer SnyderAug 28, 2025
What to do if the clutch slips excessively on my RHINO NITRO FN15 Brush Cutter?
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  Ann MitchellAug 28, 2025
  Excessive clutch slippage in your RHINO Brush Cutter can be due to several reasons. Badly worn clutch linings or warped plates require clutch repair as per the maintenance section of your manual. If you're using too much power for the clutch, reduce ground speed and material intake. Replace oil-contaminated facings, or clean glazed friction facings with emery cloth.
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Sheena SerranoAug 30, 2025
Why is my RHINO NITRO FN15 Brush Cutter leaving streaks in the swath?
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  howardbrentAug 31, 2025
  Streaking in the swath of your RHINO Brush Cutter can occur due to several factors. If conditions are too wet, allow the grass to dry before cutting. If the blades can't cut a part of the path, slow the tractor's ground speed while maintaining full PTO rpm. Adjust the tractor tires as wide as possible to allow wing blades to pick up grass. Sharpen or replace dull blades. Also, ensure the cutter height is even at the front and rear; refer to the Cutting Height Instructions for adjustment.
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Cassandra JohnsonSep 3, 2025
Why do the blades on my RHINO Brush Cutter wear out so fast?
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  Richard PottsSep 3, 2025
  If the blades on your RHINO Brush Cutter are wearing too quickly, it might be due to cutting in sandy or rocky conditions; increase the cutting height in these situations. Also, consider that soft, non-genuine blades may wear faster, so use genuine Rhino HT blades.
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Daniel Frazier MDSep 5, 2025
Why is the gearbox on my RHINO Brush Cutter so noisy?
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  Laurie Horton DDSSep 5, 2025
  A noisy gearbox in your RHINO Brush Cutter could be due to rough gears, which may improve with run-in or require gear replacement. Alternatively, a worn bearing could be the cause, necessitating bearing replacement.
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Scott VillegasSep 8, 2025
What to do if the hydraulic cylinder on my RHINO NITRO FN15 won't operate?
- K
  Kelly TaylorSep 8, 2025
  If the hydraulic cylinder on your RHINO Brush Cutter isn't operating, first check the pressure to ensure it's sufficient. Next, verify that the valve is plumbed correctly. Finally, make sure the quick coupler is completely connected.
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charles69Sep 12, 2025
Why is oil squirting from the breather vent hole of my RHINO NITRO FN15 Brush Cutter?
- B
  bcunninghamSep 12, 2025
  If oil is squirting from the breather vent hole on your RHINO Brush Cutter (beyond a small normal amount), it could indicate several issues. Oil may be leaking past the piston ring, so avoid carrying the cutter on the cylinder. A worn piston 'O' ring should be replaced. A scored or pitted cylinder wall necessitates cylinder replacement. Ensure the correct piston ring is installed on the piston.

RHINO NITRO FN15 Specifications

General

Displacement	41.5 cc
Fuel Tank Capacity	1.2 liters
Starter Type	Recoil Starter
Cutting Diameter	255mm
Shaft Type	Straight
Engine Cooling	Air-cooled
Engine Type	2-stroke, air-cooled
Power Output	1.25 kW

Summary

SAFETY SECTION

General Safety Instructions and Practices

General advice and precautions for safe operation, assembly, and maintenance of the equipment.

Operator Safety Instructions and Practices

Specific safety guidelines for the operator, including PPE and hazard awareness.

Connecting or Disconnecting Implement Safety Instructions and Practices

Safety procedures for attaching and detaching the mower from the tractor.

Transporting Safety Instructions and Practices

Guidelines for safely transporting the mower with the tractor on roads and trailers.

Maintenance and Service Safety Instructions and Practices

Safety precautions to follow during maintenance, repair, and servicing of the mower.

Storage and Parking Safety Instructions and Practices

Recommendations for safely storing and parking the mower when not in use.

Concluding Safety Instructions and Practices

Final safety advice and reminders for overall safe operation.

Decal Location

Diagram showing the placement of safety decals on the mower for hazard identification.

Decal Description

Explanation of the meaning and purpose of various safety decals found on the mower.

Federal Laws and Regulations

Overview of relevant federal laws and regulations concerning equipment operator safety and training.

INTRODUCTION SECTION

Attention Owner/Operator

Important introductory information and instructions for the owner and operator before using the machine.

ASSEMBLY SECTION

DEALER SET-UP INSTRUCTIONS

Procedures for dealers to prepare the mower for customer use after initial assembly.

ASSEMBLY

Step-by-step instructions for assembling the mower components, including hitch and wings.

CONNECTING DRIVELINE

Detailed instructions on how to properly connect the PTO driveline to the tractor.

DRIVELINE ATTACHMENT

Guidance on attaching the driveline yoke and ensuring secure connection to the PTO shaft.

TIRES AND WHEELS

Instructions and precautions for installing and maintaining mower tires and wheels.

OPERATION SECTION

Standard Equipment and Specifications

Technical details, dimensions, and specifications of the mower's standard equipment.

Operator and Tractor Requirements

Operator qualifications, tractor specs, safety devices, and setup requirements for safe operation.

Connecting and Setting Up the Mower

Procedures for attaching, connecting, and initial setup of the mower to the tractor.

Pre-Operation Inspection

Essential checks and services before operating the tractor and mower to ensure safety and functionality.

Operating the Mower

Safe procedures for operating, driving, controlling, and shutting down the mower and tractor.

Mower Storage and Transport

Guidelines for storing the mower and safely transporting it on public roads and trailers.

Troubleshooting Guide

Common problems, their causes, and suggested remedies for mower operation.

MAINTENANCE SECTION

Lubrication and Gearboxes

Procedures for lubricating and maintaining mower gearboxes, including types and intervals.

Driveline Maintenance

Instructions for inspecting, lubricating, and servicing drivelines and their components.

Blade and Clutch Maintenance

Detailed steps for servicing, sharpening, replacing blades, and maintaining clutch systems.

Other Maintenance Tasks

Maintenance for wheels, tongue, hydraulics, skid shoes, storage, and fastener torque specifications.

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RHINO NITRO FN15 User Manual

Table of Contents