RHINO GR260 User manual

©2015 Alamo Group Inc.
Published 09/15 Part No. 00787504C
OPERATOR’S MANUAL
RHINO®
1020 S. Sangamon Ave.
Gibson City, IL 60936
800-446-5158
E-mail: [email protected]
This Operator's Manual is an
integral part of the safe operation
of this machine and must be
maintained with the unit at all
times. READ, UNDERSTAND, and
FOLLOW the Safety and
Operation Instructions contained
in this manual before operating
the equipment. C01-Cover_R
Important Operating
and Safety Instructions
are found in the Mower
Safety Video that can
be instantly accessed
on the internet at:
www.algqr.com/rve
$0.00
GR260
GR472
GR484
ROTARY MOWER

In order to reduce accidents and enhance the safe operation of mowers, Alamo Group Ag Division, in cooperation
with other industry manufacturers has developed the AEM/FEMA Industrial and Agricultural Mower Safety
Practices video and guide book.
The video will familiarize and instruct mower-tractor operators in safe practices when using industrial and
agricultural mowing equipment. It is important that Every Mower Operator be educated in the operation of their
mowing equipment and be able to recognize the potential hazards that can occur while operating a mower. This
video, along with the mower operator’s manual and the warning messages on the mower, will significantly assist in
this important education.
Your Authorized Rhino Dealer may have shown this video and presented you a DVD Video when you purchased
your mower. If you or any mower operator have not seen this video, Watch the Video, Read this Operator’s
Manual, and Complete the Video Guidebook before operating your new mower. If you do not understand any of
the instructions included in the video or operator’s manual or if you have any questions concerning safety of
operation, contact your supervisor, dealer or Alamo Group Ag.
If you would like a VHS video tape of the video, please e-mail AEMV[email protected] or Fax AEM VHS
Video at [phone] or mail in a completed copy of the form on the back of this page to AEM VHS Video 1502
E Walnut Street, Seguin, TX 78155. and request the VHS video version. Please include your name, mailing
address, mower model and serial number.
Every operator should be trained for each piece of equipment (Tractor and Mower), Understand the intended use,
and the potential hazards before operating the equipment.
The information and material listed above along with this Operator’s Manual can assist you in meeting the OSHA
requirement for Operator annual training.
OSHA TRAINING REQUIREMENTS
The following training requirements have been taken from Title 29, Code of Federal Regulations Part
1928.57 (a)(6). www.osha.gov
Operator Instructions. At the time of initial assignment and at least annually thereafter, the employer shall instruct
every employee who operates an agricultural tractor or implement in the safe operating practices and servicing of
equipment with which they are or will be involved, and of any other practices dictated by the work environment.

Alamo Group Ag. Division will provide
one (1) AEM Mower Safety Practices Video
Please Send Me: VHS Format – AEM/FEMA Mower Operator Safety Video
DVD Format – AEM/FEMA Mower Operator Safety Video
Mower Operator’s Manual
AEM Mower Operator’s Safety Manual
Requester Name:_________________________________Phone:__________________________________
Requester Address:________________________________________
City:______________________________________
State:_____________________________________
Zip Code:_________________________________
Mower Model:____________________________Serial Number:____________________________
Date Purchased:___________________________Dealer Salesperson:_________________________
Dealership Name:_________________________ Dealership Location:________________________
Mail to:
AEM Video Services
1502 E. Walnut Street
Seguin, TX 78155
Or Fax to:
[phone]
Or E-mail to:
AEMV[email protected]

To the Owner/Operator/Dealer
This Operator's Manual is an integral part of the safe operation of this machine and must be maintained with the
implement at all times. A Manual canister is provided on the implement where this manual can be properly stored.
If you lose or damage this manual a free replacement manual can be obtained from an authorized Rhino dealer or
by down loading the manual from the Rhino website www.servis-rhino.com
BEFORE YOU START! READ, UNDERSTAND, and FOLLOW the information provided in this manual, the AEM
Mower Safety manual and the tractor operator's manual carefully to learn how to operate and service your machine
properly. Failure to do so could result in personal injury to you and bystanders. All implements with moving parts
are potentially hazardous. Every effort has been made to ensure that the machine is safe but operators must avoid
engaging in unsafe practices and follow the written instructions provided. The manufacturer has designed this
implement to be used with all its safety equipment properly attached to minimize the chance of accidents.
SAFETY FIRST. Completely read and understand the safety section of this manual before operating this
equipment. Do not allow anyone to operate this equipment who has not fully read and understood this manual.
Contact your Dealer to explain any instructions that you do not fully understand.
The care you give your Rhino Implement will greatly determine your satisfaction with its performance and its
service life. Carefully read and follow the instructions in this manual to provide you with a thorough understanding
of your new implement and its intended use and service requirements.
All references made in this manual to right, left, front, rear, top or bottom are as viewed facing the direction of
forward travel with the implement properly attached to the tractor.
Replacement Parts information is located in a separate Parts Manual. Rhino mowers use balanced and matched
system components for blade carriers, blades, cuttershafts, knives, knife hangers, rollers, drivetrain components,
and bearings. These parts are made and tested to Rhino specifications. Non-genuine “will fit” parts do not
consistently meet these specifications. The use of “will fit” parts may reduce mower performance, void warranties,
and present a safety hazard. Use genuine Rhino mower parts for economy and safety.
For future reference, record your Rhino product model number and serial number.
Dealer Telephone Model Number
Owner Purchase Date: Serial Number

DEALER to CUSTOMER Pre-Delivery/ Operation
Instructions
Dealer should inform the Purchaser of this product of Warranty terms, provisions, and procedures that are
applicable. Dealer should inform Purchaser to review the contents of the Operator’s Manual including safety
equipment, safe operation and maintenance, to review the Safety Signs on the implement (and tractor if possible)
and of Purchaser’s responsibility to train his/her operators of safe operation procedures.
•IMPLEMENTS: I have explained that Deflectors, Chain Guards, or Solid Skirts must be installed and main-
tained in good repair.
•DRIVELINES: I have made certain that all driveline, gearbox, and other shields are in good repair and fas-
tened securely in place to prevent injuries from entanglement or thrown objects.
•HYDRAULIC MACHINES: I have explained the necessity of using clean hydraulic oil, changing filters as
instructed, stopping leaks, damage caused by operating with over-heated oil, caring for hoses, using hoses of
proper rating, maintaining the specified operating pressure and the potential hazard of oils penetrating the
skin.
•FOLDING-TYPE IMPLEMENTS: I have explained that it is not possible to guard against thrown objects when
the head is lifted off ground and that operator is responsible to watch out for persons in the area. I have
explained that the lifted mower head or boom can contact overhead obstructions with damage to cables and
telephone lines and possible injury. I have explained that the extended head or boom or retracted boom can
contact power lines resulting in electrocution, injury or death and that operator is responsible for keeping clear
of such hazards.
PRE-DELIVERY SERVICE
CHECK AND ADJUST OR LUBRICATE AS REQUIRED
See Operator’s Manual for Details
Inspection Performed - Warranty and Safety Procedures Explained - Installation Complete
LUBRICATION & HYDRAULICS
Gearbox (Oil Levels)
Hydraulic Oil Level (External Tank)
Tractor Hydraulic Oil Level
Hydraulic Hoses (Not Kinked Tighten Connections)
Front Pump Drive (Assembly Is Tight And Shaft Properly
Aligned)
MOWER
Spindle And Motor Bolts Properly Torqued
Spindle Oil Level
Blade Carrier Bolts Properly Torqued/Retaining Pin In
Place
Mower Cutting Height And Level Adjusted
Cutting Shaft Bearings Lubricated
All Hardware Properly Torqued
Tire and Air Pressure/Lug Nuts (Correct Torque)
Wheel Bearings (Check, Grease, and Preload)
ATTACHMENTS & INSTALLATION
Deflectors Front And Rear
Shredding Attachments
Correct Blade Rotation Direction
Axle Arms And Beams
Tongue And Control Rods (Installed And Adjusted)
All Bolts - Pins And Nuts (Proper Torque)
MOWER TO TRACTOR CONNECTIONS
Draw Bar Length (Check And Set)
A-Frame Pivot & Links
Control Rods (Adjusted Equal)
Axle Height (Adjusted)
Cutting Height (Adjust)
Mount Kit-Pre-Operation Check Complete
Mower Wing (Adjust Level With The Center)
Mower Wing (Check For Proper Raising Operation)
C.V. Drivelines (Check Max Turn Radius)
Pull Type Hitch (Height Adjustment)
Mounting Hardware Properly Torqued
SAFETY ITEMS
Protective Shields (Operation And Installation)
Driveline Clutch (Torque Limiter) (Adjust And Run In)
Safety Decals (Installed)
Operator’s Manual (Supplied)
Tractor PTO Shield (Installed)
S.M.V. Emblem (Installed If Needed)
Tongue Jack (Installation and Operation)
Safety Tow Chain (Installed)
ADMA Driveline Safety Manual Supplied
AEM Mower Safety Manual (Supplied in Canister)
AEM Mower Safety Video has been shown to Purchaser

Table of Contents
SAFETY SECTION ............................................................................................................. 1-1
GENERAL SAFETY INSTRUCTIONS AND PRACTICES ................................................................................ 1-2
OPERATOR SAFETY ....................................................................................................................................... 1-3
CONNECTION OR DISCONNECTING IMPLEMENT SAFETY ....................................................................... 1-4
CRUSHING HAZARDS ..................................................................................................................................... 1-5
THROWN OBJECTS HAZARDS ...................................................................................................................... 1-6
THROWN OBJECTS HAZARDS (CONTINUED) .............................................................................................1-7
RUN OVER HAZARDS ..................................................................................................................................... 1-8
PTO ENTANGLEMENT HAZARDS .................................................................................................................. 1-9
MOWER BLADE CONTACT HAZARDS ........................................................................................................ 1-10
HIGH PRESSURE OIL LEAK HAZARDS ....................................................................................................... 1-11
ELECTRICAL & FIRE HAZARDS ................................................................................................................... 1-12
TRANSPORTING HAZARDS ......................................................................................................................... 1-13
HAZARDS WITH MAINTENANCE OF IMPLEMENT ..................................................................................... 1-14
PARTS INFORMATION .................................................................................................................................. 1-15
Decal Location - Lift Type ............................................................................................................................... 1-16
Decal Location - Pull Type .............................................................................................................................. 1-18
Decal Description ............................................................................................................................................ 1-20
Federal Laws and Regulations ....................................................................................................................... 1-28
INTRODUCTION SECTION ................................................................................................ 2-1
Equipment Specifications .................................................................................................................................. 2-3
KEY OPERATION POINTS .............................................................................................................................. 2-4
Operating Noise Level/Sound Pressure ............................................................................................................ 2-4
Warranty Information ........................................................................................................................................ 2-4
RHINO LIMITED WARRANTY .......................................................................................................................... 2-5
ASSEMBLY SECTION ....................................................................................................... 3-1
DEALER SETUP INSTRUCTIONS ................................................................................................................... 3-2
PULL TYPE (GR484 ONLY) INSTRUCTIONS ................................................................................................. 3-2
SHIELD ASSEMBLY ......................................................................................................................................... 3-3
TAIL WHEEL INSTALLATION (Model GR260) ................................................................................................ 3-4
TAIL WHEEL INSTALLATION (Model GR472) ................................................................................................ 3-4
TAIL WHEEL INSTALLATION - LIFT TYPE (Model GR484 Only) ................................................................... 3-5
DUAL TAIL WHEEL INSTALLATION - LIFT TYPE (Model GR484 Only) ........................................................ 3-5
A-FRAME INSTALLATION (Quick Hitch) (Model GR260) ................................................................................ 3-6
A-FRAME INSTALLATION (Quick Hitch) (Model GR472 & GR484) ................................................................ 3-7
DRIVELINE ATTACHMENT ............................................................................................................................. 3-8
TONGUE (Pull Type) ........................................................................................................................................ 3-8
JACKSHAFT SUPPORT AND BEARING ASSEMBLY .................................................................................... 3-9
AXLE ASSEMBLY .......................................................................................................................................... 3-10
HYDRAULIC OR MANUAL LIFT (Model GR484 Only) .................................................................................. 3-11
WHEELS (Model GR484 Only) ....................................................................................................................... 3-11
CHAIN GUARDS (Standard Equipment - All Models) .................................................................................... 3-12
Front Chain Guards ........................................................................................................................................ 3-12
Rear Chain Guard ........................................................................................................................................... 3-12
CHECK CHAINS (Extra Equipment) ............................................................................................................... 3-13
OPERATION SECTION ...................................................................................................... 4-1
OPERATOR REQUIREMENTS ........................................................................................................................ 4-3
TRACTOR REQUIREMENTS ........................................................................................................................... 4-4
ROPS and Seat Belt ......................................................................................................................................... 4-4
Tractor Safety Devices ...................................................................................................................................... 4-4

Tractor Horsepower .......................................................................................................................................... 4-5
3-Point Hitch ..................................................................................................................................................... 4-5
Front End Weight .............................................................................................................................................. 4-5
Drawbar-Pull Type Mower ................................................................................................................................ 4-6
Power Take Off (PTO) ...................................................................................................................................... 4-6
GETTING ON AND OFF THE TRACTOR ........................................................................................................ 4-7
Boarding the Tractor ......................................................................................................................................... 4-7
Dismounting the Tractor .................................................................................................................................... 4-8
STARTING THE TRACTOR ............................................................................................................................. 4-9
CONNECTING THE MOWER TO THE TRACTOR .......................................................................................... 4-9
Connecting the Mower-Lift Type ..................................................................................................................... 4-10
3-Point Quick Hitch ......................................................................................................................................... 4-10
Connecting Mower - Lift Type (Quick Hitch) ................................................................................................... 4-11
Safety Tow Chain ............................................................................................................................................ 4-11
SETTING THE MOWER ................................................................................................................................. 4-12
Setting Mower Height- Lift Type - (Standard or Quick Hitch) .......................................................................... 4-12
Connecting the Mower-Pull Type .................................................................................................................... 4-14
Setting Mowing Height-Pull Type .................................................................................................................... 4-15
Setting Deck Pitch ........................................................................................................................................... 4-16
DRIVELINE ATTACHMENT ........................................................................................................................... 4-17
Driveline Length Check ................................................................................................................................... 4-17
Constant Velocity (CV) Driveline ..................................................................................................................... 4-19
PRE-OPERATION INSPECTION AND SERVICE .......................................................................................... 4-20
Tractor Pre-Operation Inspection/Service ....................................................................................................... 4-21
Mower Pre-Operation Inspection/Service ....................................................................................................... 4-21
Cutting Component Inspection ........................................................................................................................ 4-24
Blade Bolt Inspection ...................................................................................................................................... 4-27
DRIVING THE TRACTOR AND IMPLEMENT ................................................................................................ 4-30
Starting the Tractor ......................................................................................................................................... 4-31
Brake and Differential Lock Setting ................................................................................................................. 4-31
Raising the Mower .......................................................................................................................................... 4-32
Driving the Tractor and Mower ........................................................................................................................ 4-32
Crossing Ditches and Steep Inclines .............................................................................................................. 4-33
OPERATING THE TRACTOR AND IMPLEMENT .......................................................................................... 4-34
Foreign Debris Hazards .................................................................................................................................. 4-35
Bystanders/Passersby Precautions ................................................................................................................ 4-35
Engaging the Power Take Off (PTO) .............................................................................................................. 4-36
PTO RPM and Ground Speed ........................................................................................................................ 4-37
Operating the Mower ...................................................................................................................................... 4-37
Right of Way (Highway) Mowing ..................................................................................................................... 4-40
Shutting Down the Implement ......................................................................................................................... 4-41
DISCONNECTING THE MOWER FROM THE TRACTOR ............................................................................ 4-41
MOWER STORAGE ....................................................................................................................................... 4-43
TRANSPORTING THE TRACTOR AND IMPLEMENT .................................................................................. 4-43
Tire and Wheels .............................................................................................................................................. 4-44
Transporting on Public Roadways .................................................................................................................. 4-45
Hauling the Tractor and Implement ................................................................................................................. 4-46
TROUBLESHOOTING GUIDE ....................................................................................................................... 4-47
MAINTENANCE SECTION ................................................................................................. 5-1
HAZARDS WITH MAINTENANCE OF IMPLEMENT ....................................................................................... 5-2
Lubrication ........................................................................................................................................................ 5-3
GEARBOX ........................................................................................................................................................ 5-6
TAIL WHEEL ASSEMBLY ................................................................................................................................ 5-6
WHEEL HUB ASSEMBLY (Pull Type) .............................................................................................................. 5-7
DRIVELINE LUBRICATION .............................................................................................................................. 5-7
LIFT TYPE DRIVELINE & PULL JACKSHAFT SHIELDS ................................................................................ 5-8

CV PULL TYPE DRIVELINE ........................................................................................................................... 5-10
PROTECTIVE, INTEGRAL SHIELDS CAT 5 CV ........................................................................................... 5-11
BLADE SERVICING ....................................................................................................................................... 5-12
BLADE REMOVAL .......................................................................................................................................... 5-13
Blade Bolt Inspection ...................................................................................................................................... 5-14
BLADE CARRIER REMOVAL ........................................................................................................................ 5-15
BLADE CARRIER INSPECTION .................................................................................................................... 5-15
BLADE CARRIER INSTALLATION ................................................................................................................ 5-16
SLIP CLUTCH (GR260) .................................................................................................................................. 5-16
SLIP CLUTCH (GR472 & GR484) .................................................................................................................. 5-17
SEASONAL CLUTCH MAINTENANCE .......................................................................................................... 5-18
STORAGE ...................................................................................................................................................... 5-19
PROPER TORQUE FOR FASTENERS ......................................................................................................... 5-19