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I-TRIM MANUAL 3-15-06 NATIONAL MOWER CO.
700 Raymond Ave., P.O. Box 14299, St. Paul, Minnesota 55114-0299, U.S.A.
Phone (651) 646-4079 Fax (651) 646-2887
www.nationalmower.com
MARCH 2006
I-TRIM
OWNER'S MANUAL
Includes Specifications, Assembly, Operation,
Maintenance & Parts Lists 2 I-TRIM
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TABLE OF CONTENTS
Table of contents ...................................................... 3
Introduction ............................................................... 4
Safe Operating Practices ...................................... 4-6
Decal (Transfer) Identification ............................... 7-9
Introduction and Receipt of Shipment ................... 10
1 Specifications ................................................... 11
2 Assembly Instructions ...................................... 12
3General Information .......................................... 15
4Controls ............................................................. 16
5Operation .......................................................... 18
6Adjustments ...................................................... 20
7Maintenance ....................................................... 22
8Storage ................................................................ 28
9Troubleshooting .................................................. 29
Wiring Diagram.........................................................33
Maintenance Record.................................................34
10Parts Ordering Information ............................... 35
Screen box, guards, ROPS ................... 36-37
Deck Lift Arms and Pull Arms ............... 38-39
Seat, Wheels, Engine, Radiator, tank 340-41
Wheel Motors, Filters, Hyd Comp. ....... 42-43
Pedal Assy, Hyd Pumps ....................... 44-45
Front Axle, Fuel Tank, Frame ............... 46-47
Engine and Radiator Assembly ................. 48
Rear Mower Deck Assembly ...................... 49
Right Mower Deck Assembly ..................... 50
Left Mower Deck Assembly ....................... 51
Hydraulics- Deck Motors/Oil Cooler ..... 52-53
Hydraulics - Wheel Motors/Steering ..... 54-55
Electrical System Components...................56
Steering Cylinder........................................57
Hydraulic Schematic - Steering/Drive.......................58
Hydraulic Schematic - Mower Drives/Deck Lift.........59
Warrenty...................................................................61
Appendix 1- Briggs & Stratton Operating Instructions 4
INTRODUCTION
Read this manual carefully to learn how to operate and
maintain your product properly. The information in this
manual can help you and others avoid injury and product
damage. The operator is responsible for operating this
product properly and safely.
This manual identifies potential hazards and has special
safety messages that help you and avoid personal injury and
even death. Danger, Warning, and Caution are signal words
used to identify the level of hazard. Howerver, regardless of
the hazard, be extremely careful.
Danger signals an extreme hazard that will cause series
injury or death if you do not follow the recommended
precautions.
Warning signals a hazard that may cause serious injury or
death if you do not follow the recommended precautions.
Caution signals a hazard that may cause minor or moderate
injury if you do not follow the recommended precautions.
This manual uses two other words to highlight information.
Important call attention to special mechanical information
and Note: emphasizes general information worthy of special
attention.
SAFETY
This machine meets or exceeds ANSI B71.4-1999 specifica-
tions in effect at the time of production.
Improper use or maintenance by the operator or owner can
result in injury. To reduce the potential for injury, comply with
these safety instructions and always pay attention to the
safety alert symbols: CAUTION, WARNING, and DANGER.
Failure to comply with the instruction may result in personal
injury or death.
Safe Operating Practices
The following instructions are from CEN standard EN
836:1997, ISO standard 5395: 1990, and ANSI B71.4-1999.
Training Read the Operators Manual and other training material
carefully. Be familiar with the controls, safety signs, and
the proper use of the equipment. Never allow children or people unfamiliar with these
instructions to use or service the mower. Local
regulations may restrict the age of the operator. Never mow while people, especially children, or pets are
nearby. Do not carry passengers. Keep in mind that the operator or user is responsible for
accidents or hazards occurring to other people or their
property. All drivers and mechanics should seek and obtain
professional and practical instruction. The owner is
responsible for training the users. Such instruction
should emphasize:

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the need for care and concentration when working with
ride-on machines;
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the owner/user can prevent and is responsible for
accidents or injuries occurring to himself or herself, other
people, or property;
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control of a ride-on machine sliding on a slope will not
be regained by the application of the brake or putting
transmission into neutral. Some reasons for loss of
control are: insufficient wheel grip, driving too fast,
inadequate braking, using a machine that is unsuitable
for a task, lack of awareness of the effect of ground
conditions (especially slopes), and incorrect load
distribution.

Preparation Evaluate the terrain to determine what accessories and
attachments are needed to properly and safely perform
the job. Only use accessories and attachments approved
by the manufacturer. While mowing, always wear substantial footwear, long
trousers, hard hat, safety glasses, and ear protection.
Long hair, loose clothing, or jewelry may get tangled in
moving parts. Do not operate the equipment when
barefoot or wearing open sandals. Thoroughly inspect the area where the equipment is to
be used and remove all objects which may be thrown by
the machine. Check that operators presence controls, safety
switches, and shields are attached and functioning
properly. Do not operate unless they are functioning
properly. Warning - Fuel is highly flammable. Take the following
precautions:
- Store fuel in containers specifically designed for this
purpose.
- Refuel outdoors only and do not smoke while refuelling.
- Add fuel before starting the engine. Never remove the
cap of the fuel tank or add fuel while the engine is
running or when the engine is hot.
- If fuel is spilled, do not attempt to start the engine but
move the machine away from the area of spillage and
avoid creating any source of ignition until fuel vapors
have dissipated. I-TRIM
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Operation Do not operate the engine in a confined space where
dangerous carbon monoxide fumes can collect. Operate only in daylight or in good artificial light. Stay
alert for holes in the terrain and other hidden hazards. Before attempting to start the engine, disengage all
blade attachment clutches, shift into neutral, and engage
the parking brake. Only start the engine from the
operators position. Use seat belts if provided. Never operate with the discharge deflector raised,
removed, or altered, unless using a grass catcher. Remember there is no such thing as a safe slope.
Travel on grass slopes requires particular care. To guard
against overturning:
- do not stop or start suddenly when going up or downhill.
- machine speeds should be kept low on slopes and
during tight turns.
- stay alert for humps and hollows and other hidden
hazards.
- never mow across the face of the slope, unless the
mower is designed for this purpose. Watch out for traffic when crossing or near roadways.
Slow down and use caution when making turns and
crossing roads and sidewalks. Stop the blade rotation
before crossing surfaces other than grass. Stop reels or
deck blades if not mowing. When using any attachments, never direct discharge of
material toward bystanders or allow anyone near the
machine while in operation. Never operate the machine with damaged guards,
shields, or without safety protective devices in place. Be
sure all interlocks are attached, adjusted properly, and
functioning properly. Do not change the engine governor settings or
overspeed the engine. Operating the engine at
excessive speed may increase the hazard of personal
injury. Disengage drive to attachements when transporting or
not in use. Before leaving the operators position:
- stop on level ground;
- disengage the power take-off and blade rotation
and lower the attachments;
- Change into neutral and set the parking brake;
- stop the engine and remove the key. Keep hands and feet away from the cutting units. Stop the engine and disengage drive to attachment
- before refuelling;
- before removing the grass catchers;
- before making height adjustment unless adjustment
can be made from the operators position.
- before clearing blockages;
- before checking, cleaning or working on the mower;
- after striking a foreign opject or if an abnormal vibration
occurs. Inspect the mower for damage and make repairs
before restarting and operating the equipment. Reduce the throttle setting before stopping engine and, if
the engine is provided with a shut-off valve, turn the fuel
off at the conclusion