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MODEL 68 SR TRIPLEX MOWER
MODEL 68 DL TRIPLEX MOWER
OWNER'S MANUAL
Includes Operation, Maintenance and Parts List
NATIONAL MOWER CO.
June 2003
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
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ONE YEAR LIMITED WARRANTY
For the period of one year from the date of purchase (45 days if the product is used for rental purposes),
National Mower Company will repair or replace free of charge, for the original purchaser, any part or
parts found by inspection to be defective by our Factory Authorized Service Station or by the Factory
at St. Paul, Minnesota to be defective in material or workmanship or both. All transportation charges
on parts submitted for repair or replacement under this warranty shall be paid for by the purchaser.
This warranty does not include engines, engine parts or tires which are covered under separate
warranties furnished by their manufacturer or supplier. All service under this warranty will be furnished
and performed by our Factory Authorized Service Stations.
THERE IS NO OTHER WARRANTY EXPRESSED OR IMPLIED
Warranties, including those of merchantability and fitness for a particular purpose, are limited to
one year from purchase or 45 days if the product is rented, and to the extent permitted by law, any
and all implied warranties are excluded. The above remedy of repair and replacement of defective
parts is the purchaser's exclusive remedy for any defect, malfunction, or breach of warranty.
Liability for incidental or consequential damages under any and all warranties is excluded to the
extent permitted by law.
NATIONAL MOWER COMPANY
P.O. Box 14299
700 Raymond Avenue
St. Paul, Minnesota 55114-0299, U.S.A.
Phone (651) 646-4079
Fax (651) 646-2887
www.nationalmower.com
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68OM-06/03
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TABLE OF CONTENTS
Warranty ................................................................................................... 2
Introduction ............................................................................................... 3
Safety Information .................................................................................... 4
Safety and Control Decals........................................................................ 7
Receipt of Shipment ............................................................................... 11
Uncrating Instructions............................................................................. 11
Assembly ................................................................................................ 12
Preparation ............................................................................................. 14
Operation ................................................................................................ 14
Maintenance ........................................................................................... 18
Maintenance Record .............................................................................. 26
Troubleshooting...................................................................................... 27
Parts List................................................................................................. 28
Frame & Running Gear ................................................................... 28
Running Gear & Misc. Parts - 68 DL............................................... 30
Seat Mounting & Belt Guards.......................................................... 31
Drive Mechanism - Upper Portion................................................... 32
Drive Mechanism - Middle Portion .................................................. 34
Drive Mechanism - Lower Portion ................................................... 35
Drive Mechanism - 68 DL................................................................ 36
Rear Axle & Differential................................................................... 38
Wing Cutting Units........................................................................... 40
Rear Cutting Unit............................................................................. 42
Skids, Reel End Shields & Guards ................................................. 44
Roller & Standard Scrapers ............................................................ 45
Roller Scraper Kit, Dial-A-Height™................................................. 46
Dial-A-Height™ Roller Adjuster Kit ................................................. 47
Dial-A-Height™ Adjuster ................................................................. 48
Safety Switches ...................................................................................... 49
Electrical Diagrams................................................................................. 50
Electrical Parts........................................................................................ 51
Specifications.......................................................................................... 52
Parts Ordering Information ..................................................................... 53
Declaration of Conformity....................................................................... 55
NATIONAL 68 SR & DL TRIPLEX
®
INTRODUCTION
This manual has been prepared by National Mower
Company as an aid to users in the assembly, safe
operation, maintenance, adjustment and ordering replacement parts. Additional information will gladly be
furnished by calling or writing the manufacturer or his
authorized agent.
Please furnish us with the Model Number, Serial Number
and Date of Purchase when contacting us about your
machine. Designations of right, left, front add rear are
used as if the operator was sitting in the mower seat.
68OM-06/03
Before operating mower, carefully and completely read
this manual. The contents provide you with an
understanding of safety instructions and controls during
normal operation and maintenance. Understand all
safety precautions provided in the manuals. Review
control functions and operation of the mower. Do not
operate the mower unless all controls function as
described in this manual. Review recommended
lubrication, maintenance, and adjustments.
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SAFETY INFORMATION
The safety alert words below are used in this manual to
identify potentially hazardous conditions. Their
definitions are:
DANGER means "IMMINENTLY HAZARDOUS
SITUATION! If not avoided, WILL RESULT in death or
serious injury."
WARNING means "POTENTIALLY HAZARDOUS
SITUATION! If not avoided, COULD RESULT in death or
injury."
CAUTION means "POTENTIALLY HAZARDOUS
SITUATION! If not avoided, MAY RESULT in minor or
moderate injury." It may also be used to alert against
unsafe practices.
The safety alert triangle symbols on your mower point
out important safety precautions.
These symbols mean:
ATTENTION!
PERSONAL SAFETY IS INVOLVED!
BECOME ALERT!
OBEY THE MESSAGE!
safety guards are in place at all times, except during
servicing.
Keep all nuts, bolts, and screws tight.
3. OPERATION
Wear approved safety glasses or goggles when operating
the mower.
Do not allow children to operate mower. Do not allow
adults to operate mower without proper instruction.
Do not carry passengers. Keep children and pets at a safe
distance from an operating mower. Stop the mower if
anyone approaches the mower.
Disengage all cutting-unit clutches and shift into neutral
before attempting to start the engine. Disengage main
clutch before shifting cutting-unit clutches.
Disengage power to the cutting units and stop the engine
before leaving the operator’s position.
Disengage power to the cutting units and stop the engine
before making any repairs or adjustments.
Disengage power to the cutting units when transporting or
not in use.
Take all possible precautions when leaving the mower
unattended, including shifting into neutral, setting the
parking brake, stopping the engine and removing the
ignition key.
Watch for dangerous traffic when crossing or near roadways.
NATIONAL MOWER SAFE OPERATING
PRACTICES
1. TRAINING
Know the control functions and how to stop quickly. READ
THE OWNER’S MANUAL.
2. PREPARATION
Clear the work place of objects which might be picked up
by the blades and thrown.
Handle fuel with CAUTION - it is highly flammable.
• Use an approved fuel container.
• Never remove the fuel tank cap or add fuel to a running
or hot engine. Never fill the fuel tank indoors. Wipe up
spilled fuel immediately.
• Open garage doors to allow ventilation if engine is run
inside – exhaust fumes are dangerous. Do not run engine in any enclosed area.
Keep the mower in safe operating condition. Make sure
that all safety switches are operating properly and all
Never direct the discharge of material from operating reels
toward bystanders nor allow anyone near the mower.
The mower and reels should be stopped and inspected
for damage after striking a foreign object. The damage
should be repaired before restarting and operating the
mower.
Proceed as follows when mowing:
• Mow only in daylight or in good artificial light.
• Never make a cutting height adjustment while the engine is running.
• Shut the engine off when removing grass or unclogging
reels.
This machine is to be used only as a grass cutter or lawn
mower.
Never operate the mower while using drugs, medications,
or alcohol. Safe operation requires complete and unimpaired attention. Never allow anyone to operate the
mower when their alertness or coordination is impaired.
Do not wear loose clothing or loose shoelaces, which may
become entangled in mower controls or drive components.
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NATIONAL 68 SR & DL TRIPLEX
®
Do not mow in reverse, unless absolutely necessary.
Always look down and behind before and during reverse
motion.
Shut off and raise the cutting units before operating the
mower at transport speed. (Model 68 DL only.)
Do not reverse battery connections. Damage to the mower
can result. Battery gases are explosive and can cause
death or injury. Keep open flames, sparks, and smoking
materials away from batteries. Battery fluid contains
sulfuric acid. Contact with skin, eyes, or clothing can
cause chemical burns. Wash immediately and seek
medical assistance. Wear protective clothing and safety
glasses when handling a battery. (Model 68 DL only.)
4. HILL OPERATION
Do not stop or start suddenly when going uphill or downhill.
Mow up and down the face of steep slopes — never across
steep slopes. Do not exceed a slope of 15o in any direction.
Reduce travel speed on slopes and in sharp turns to
prevent tipping or loss of control. Use extreme caution
when changing direction on slopes.
Watch for holes in the terrain and other hidden hazards.
Do not shift into neutral and coast downhill.
Use extreme care when mowing near dropoffs or embank-
ments. The mower could roll over if a wheel goes over the
edge, or if an edge caves in.
If mower stops going uphill, disengage power to the cutting
units and slowly back down.
5. MAINTENANCE
Never store the mower, with fuel in the tank, inside a
building where fumes could reach an open flame or spark.
Allow the engine to cool before storing in any enclosure.
Keep the engine free of grass, leaves or excessive grease
to reduce a fire hazard.
Do not change the engine governor settings or overspeed
the engine.
Keep non-skid surfaces clean. Replace the non-skid
material if worn, damaged, or missing.
Never mow while people, especially children, or pets are
nearby.
Keep in mind that the operator or user is responsible for
accidents or hazards occurring to other people or their
property.
Do not carry passengers.
All drivers should seek and obtain professional and
practical instruction. Such instruction should emphasize:
• the need for care and concentration when working with
ride-on machines;
• control of a ride-on machine sliding on a slope will not
be regained by the application of the brake. The main
reasons for loss of control are:
• insufficient wheel grip;
• being driven too fast;
• inadequate braking;
• the type of machine is unsuitable for the task: do not
use mower for unsuitable tasks;
• lack of awareness of the effect of ground conditions,
especally slopes;
• hitching and load distribution: do not hitch or tow
other devices.
2. PREPARATION
WARNING
Gasoline (petrol) is highly flammable.
Store fuel in containers specifically
designed for this purpose. Refuel outdoors only. 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 sources of ignition
until fuel vapors have dissipated. Replace all fuel
tanks and container caps securely.
While mowing, always wear substantial footwear and
long trousers. Do not operate the equipment when
barefoot or wearing open sandals.
Wear appropriate safety gear, including safety glasses
and gloves, while servicing the mower.
ISO SAFE OPERATING PRACTICES
1. TRAINING
Read the instructions carefully. Be familiar with the
controls and the proper use of the equipment.
Never allow children or people unfamiliar with these
instructions to use the lawnmower. Local regulations can
restrict the age of the operator.
68OM-06/03
Thoroughly inspect the area where the equipment is to be
used and remove all objects which can be thrown by the
machine.
Replace faulty silencers.
Before using, always visually inspect to see that the reels,
bed knives, and cutting unit assemblies are not worn or
damaged. Replace worn or damaged reels and bedknives
in sets to preserve balance.
On multi-reel machines, take care as rotating one reel can
cause other reels to rotate.
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SAFETY INFORMATION
3. OPERATION
Do not operate the engine in a confined space where
dangerous carbon monoxide fumes can collect.
Mow only in daylight or good artificial light.
Before attempting to start the engine, disengage all cutting
unit clutches and shift into neutral.
Do not use on slopes of more than 15°.
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;
• engage clutch slowly , always keep machine in gear, especially when travelling 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 machine is designed for this purpose.
Watch out for traffic when crossing or near roadways.
Stop the reel rotation before crossing surfaces other than
grass.
Never direct discharge of material toward bystanders or
allow anyone near the machine while in operation.
Never operate the lawnmower with defective guards, or
without safety devices in place.
Do not change the engine governor setting or overspeed
the engine. Operating the engine at excessive speed can
increase the hazard of personal injury.
Before leaving the operator's position,
• disengage the power take-off and lower the cutting units;
Disengage drive to attachments when transporting or not
in use.
Stop the engine and disengage drive to attachment:
• before refuelling;
• before removing the grass catcher;
• before making height adjustment;
• before cleaning blockages;
• before checking, cleaning, or working on the mower;
• after striking a foreign object. Inspect the mower for
damage and make repairs before restarting and operating the equipment.
Reduce the throttle setting during engine shutdown and
turn the fuel off at the conclusion of mowing.
4. MAINTENANCE AND STORAGE
Keep all nuts, bolts, and screws tight to be sure the
equipment is in safe working condition.
Never store the equipment with fuel in the tank inside a
building where fumes can reach an open flame or spark.
Allow the engine to cool before storing in any enclosure.
To reduce the fire hazard, keep the engine, silencer,
battery compartment, and fuel storage area free of grass,
leaves, or excessive grease.
Replace worn or damaged parts for safety.
If the fuel tank has to be drained, this should be done
outdoors.
When machine is to be parked, stored, or left unattended,
lower the cutting means unless a positive mechanical
lock is used.
Be careful during adjustment of the machine to prevent
entrapment of the fingers between moving blades and
fixed parts of the machine.
• shift into neutral and set the parking brake;
• stop the engine and remove the key.
Disengage drive to the cutting units, stop the engine,
remove the ignition key, and disconnect the spark plug
wire:
• before cleaning blockages or unclogging chute;
• before checking, cleaning, or working on the machine;
• after striking a foreign object. Inspect the lawn mower
for damage and make repairs before restarting and operation the lawn mower;
• if lawn mower starts to vibrate abnormally (check immediately).
6
On multi-reel machines, take care as rotating one reel can
cause other reels to rotate.
CALIFORNIA SAFE OPERATING PRACTICES
Mowers used in California, USA are required by law (CA
PRC 4442 & CA H & SC 13005) to have their engines
equipped with spark arresters when operating in flammable vegetation. Arresters must be obtained from your
engine dealer and are not available from National Mower
Company.
68OM-06/03
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NATIONAL 68 SR & DL TRIPLEX
®
SAFETY AND CONTROL DECALS
Safety decals and instructions are located on the mower near the controls or near areas of potential hazards. Worn,
damaged, or loose decals must be replaced. The decal part number and the location of the decal on the mower are
listed next to each decal.
07581 - MAIN ENGINE CLUTCH
LEVER
(located on top surface of engine
belt guard)
Move lever backward to put
clutch in neutral position, forward
to cause mower to travel
(direction depends on differential
shift position).
WARNING
07582 - DIFFERENTIAL SHIFT LEVER
(located on top edge of differential gear drive)
Move the shift lever and set it in the notch to place the
differential into Forward, Neutral, or Reverse. NEVER
SHIFT THE DIFFERENTIAL WITH THE MOWER IN
MOTION OR THE MAIN ENGINE CLUTCH ENGAGED.
Engage the clutch slowly. Refer to
instructions in the OPERATIONS section
07584 – TRANSPORT CLUTCH PEDAL
(Model 68 DL)
(located on top surface of engine belt guard)
Pressing the pedal will cause the mower to
run in high-speed transport mode. Operate
the transport clutch by slowly pressing the
pedal with your left foot. Releasing the
pedal will cause the mower to coast to a
stop, or resume mowing speed.
Before using, disengage the cutting unit
clutches and raise the cutting units to their
transport position.
WARNING
UNITS ARE TURNING, OR WHEN THE DIFFERENTIAL SHIFT IS IN REVERSE.
NEVER USE THE TRANSPORT
CLUTCH WHILE THE CUTTING
07585 – ENGINE THROTTLE
(located on steering wheel)
Move the engine throttle lever forward
for fast speed, backward for slow speed
68OM-06/03
07583 – WING MOWER CLUTCH
(located on top surface of main belt
guard)
Move the clutch lever back to engage
the wing mower clutch. Move the lever
forward to put the clutch in neutral.
07586 – IGNITION KEY (Model 68 DL)
(located on instrument cluster panel)
To start the engine, sit on the seat and
place all cutting unit clutches in neutral.
Turn the key to the full clockwise position
to start the engine. Use the choke as
required. Once the engine has started,
release the key and allow it to rotate to the
central run position.
To stop the engine, turn the key to the full
counterclockwise position.
Refer to the engine manual for details on proper engine
operation.
Disengage cutting unit clutches, engage the parking brake
and remove the key whenever leaving the mower seat.
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SAFETY AND CONTROL DECALS
07587 – IGNITION KEY (Model 68 SR)
(located on top surface of main belt
guard)
To start the engine, place the main
clutch and all cutting unit clutches in
neutral. Turn the key to the clockwise
position and pull on the recoil starter.
Use the choke as required.
To stop the engine, turn the key to the
full counterclockwise position.
Refer to the engine manual for details on proper engine
operation.
Disengage cutting unit clutches, engage the parking
brake and remove the key whenever leaving the mower
seat.
07588 – PARKING BRAKE LEVER
(located on top surface of main belt
guard)
07599 – WARNING
DECAL
(located on instrument
cluster [68 DL] or main
belt guard [68 SR])
Read and understand
the information in the
Owner’s Manual before operating this
mower.
Read and understand
the information in the
Owner’s Manual
before attempting to
repair, service, or
maintain this mower.
Turn off the mower
engine, remove the
ignition key, and
disconnect the engine
spark plug before
attempting to repair, service, or maintain this mower.
Move the parking brake lever
forward to set the brake, rearward
to release the brake. Driving the
mower with the parking brake set
will cause excess wear on the brake
mechanism.
07589 – SERVICE BRAKE PEDAL
(located on top surface of main belt
guard)
Press the brake pedal with your right
foot to stop the mower. You must also release the main
engine clutch in order for the mower to come to a
complete stop.
WARNING
the state of California to cause cancer, birth defects, or
other reproductive harm. Do not operate the engine in
a confined space where dangerous carbon monoxide
fumes can collect.
WARNING
DANGER
engaged. Serious injury or death can result from loss
of control.
WARNING
The engine exhaust from this product contains chemicals known to
Objects may be thrown from the cutting units. Keep bystanders away
from the mower.
Never allow the mower to freewheel
down hills without the traction drive
Do not operate the mower on slopes
greater than 15 degrees.
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68OM-06/03
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07590 – REAR CUTTING UNIT CLUTCH
(located on top surface of rear cutting unit)
Pull lever forward and toward the center of the machine
to engage sliding jaw clutch.
To disengage, pull lever forward and out to engage
locking pin.
Never engage the drive unless the rear cutting unit has
been lowered to the cutting position.
(Note that the decal is viewed properly while looking
toward the rear of the mower.)
NATIONAL 68 SR & DL TRIPLEX
®
07083 – SERIAL NUMBER DATA PLATE
(located on mower frame, left side, below seat)
07595 – MANUFACTURER & SOUND LEVELS
(located on left side of main belt guard)
Guaranteed sound power level and manufacturer’s
information
07415 – MODEL 68 DL LABEL (68 DL only)
07598 – MODEL 68 SR LABEL (68 SR only
(located on left side of engine belt guard and right side of
main belt guard)
07600 – CUTTING UNIT DANGER
(located on top surface of each cutting unit)
DANGER
Reels and bed knives on the cutting
units are sharp. Keep hands and
feet away from the cutting units.
DANGER
Do not attempt to work around the
cutting units while they are running.
Your fingers, hands, arms, or any loose clothing may
become entangled in the belt drives. Do not operate
the cutting units unless you are seated on the mower.
Keep all guards and shields in place.
205341 – INSTRUCTIONS for OPTIONAL DIAL-AHEIGHT ADJUSTER
(located on the top shield of each cutting unit)
Raise and turn the adjuster knob counterclockwise to
lower the height of cut. Raise and turn the adjuster knob
clockwise to raise the height of cut. Read the instructions
for the Dial-A-Height adjusters in the Operations section
of this manual.
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SAFETY AND CONTROL DECALS
205399 – Optional DIAL-A-HEIGHT SCALE (Rear cutting
units)
205346 – Optional DIAL-A-HEIGHT SCALE (Wing cutting
units)
(located on each Dial-A-Height bracket)
Align the bottom edge of the Dial-A-Height bracket with
the desired height of cut on this decal. Read the instructions
for the Dial-A-Height adjusters in the Operations section
of this manual.
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68OM-06/03
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RECEIPT OF SHIPMENT
NATIONAL 68 SR & DL TRIPLEX
®
Carefully inspect your machine and crate for damage that
could have occurred during shipment. If damages or
shortages are noted, have the transportation company’s
representative note this on the bill of lading.
UNCRATING INSTRUCTIONS
CAUTION
In order to prevent possible damage to the machine or
personal injury, the following uncrating procedure must
be followed:
1. Position Crate (1) on a hard, level surface.
2 Cut and remove all Steel Banding (2). Remove the
entire top of the crate.
Wear protective gloves. Steel
banding is sharp. Handle cutting
units carefully. Reels rotate freely
and are very sharp.
Note: Claims for shipping damages must be noted by the
consignee at the point of destination and filed with the
transportation company that delivers the shipment.
3. Unbolt Seat (3) from crate bracing and lay seat aside
for installation later.
4. Lift Rear Cutting Unit (4) off the crate supporting
members and set aside for later attachment.
5. Make sure Wing Cutting Units (5) are in their upright
positions, secured to the mower frame with Wing
Cutting Unit Latches.
6. Knock down all sides of crate and remove. Roll
mower backwards off of crate base.
CAUTION
CAUTION
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ASSEMBLY
WARNING
Improper assembly or adjustments
can cause serious injury.
SEAT
1. Mount the Rear Cutting Unit Lifter and Seat Assembly
(A) to the mower frame using (2) 1/2" bolts, nuts, and
washers (B).
2. Fasten the seat slides (C) to the bottom of the seat (D)
using the fasteners provided with the slider mechanisms. Orient the slider so the adjuster lever (E) is on
the operator's left hand side.
3. Remove the seat switch bracket (F, 1" x 10" bar))
mounted near the ends of the legs of the seat hinge.
Discard the fasteners. Mount the seat and slider assembly onto the seat hinge (G). Replace the seat
switch bracket and tighten fasteners. Plug the wire
harness socket (H) into the seat safety switch (J). Use
care in routing the wires so that they are not pinched
by the switch lever or seat support mechanisms.
12
REAR CUTTING UNIT
1. Pivot the Seat Brace (A) from the axle so that the top
end aligns with the tab at the back of the seat hinge
assembly. Fasten with a 5/16" x 1" Hex Head Bolt,
Lock Washer and Hex Nut.
2. Slide the rod end of the lifter tee (B) through the hole
(C) in the pad on the rear mower frame and secure it
to the lift arm pivot with the cotter pin and washer as
shown at (D).
3. Attach the Pull Rod (E) to the cutting unit Pivot Tube
(F) with Pin and Spacers.
NOTE: Before completing assembly, it will be necessary
to adjust the drive belt tension. See "Rear Cutting Unit
Drive Belt Tension" in the Maintenance section of this
manual, page 23.
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NATIONAL 68 SR & DL TRIPLEX
®
WING CUTTING UNITS
1. Remove the two Wing Cutting Unit Belts from the
steering column.
2. Release the Laches (A) from Wing Cutting Units. To
release the latch, lift the wing cutting unit handle until
the latch swings upward into a nearly vertical position.
Carefully lower the cutting unit to the ground. Avoid
dropping the cutting unit, as damage may result to the
cutting unit, the mower, or your turf.
3. Slip wing Cutting Unit belts (B) over Countershaft
Pulleys (C).
4. Block mower wheels to prevent mower from moving
forward. Pull Wing Cutting Units (D) forward so that
they slide on Pull Rods (E) and compress springs (F).
This will allow enough slack to enable belts to be
installed over Reel Pulleys (G).
5. Pull Cutting Units backwards to adjust belt tension.
Tighten bolt (H) to lock in place.
REAR CUTTING UNIT BELT
Install Rear Cutting Unit Belt (A) from Countershaft Pulley
(B) to outer Drive Pulley (C). Idler Pulley (D) must ride on
top of lower belt to provide proper tension. NOTE: It will be
necessary to raise rear cutting unit to allow enough slack
to get belt over pulleys.
REEL TO BED KNIFE ADJUSTMENT
To prevent damage during shipment, the reels have been
moved away from the bed knives at the factory. Follow
the procedure for "Reel to Bed Knife Adjustment" in the
Maintenance section of this manual to properly adjust
your cutting units.
ENGINE
CAUTION
MOWER IS SHIPPED WITH DRY
ENGINE. DO NOT START ENGINE
UNTIL OIL IS ADDED TO CRANKCASE. See Engine
Manual for additional information.
DIFFERENTIAL
Grease has been installed in the differential at the factory.
For additional information, refer to the Maintenance section of this manual.
68OM-06/03
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PREPARATION
DANGER
knives are very sharp. Reels rotate freely and rotating
one reel can cause other reels to rotate.
CAUTION
safe operating suggestions listed in the Safety Information
section of this manual.
Check the following items before each use of the mower.
TIRE PRESSURE - Use a tire pressure gage to check
the tire pressure. Fill tires with compressed air as
needed to obtain the pressure labelled on the sidewall of
the tire.
ENGINE OIL - Check level on dipstick. Refer to the
engine manual for instructions on adding oil and which
oil viscosity to use.
Handle cutting units carefully with
protective gloves. Reels and bed
Moving machinery can be dangerous
if not operated properly. Follow all
FUEL - Check fuel level. Add fuel as required. Refer to
the engine manual for type of fuel and other safety
requirements.
ENGINE COOLING - Keep engine cowlings clear of
clippings.
LUBRICATION - Add lubricant to pivots and other
lubrication points as required. Refer to the lubrication
chart in the Maintenance section of this manual.
REELS CLEAR OF DEBRIS - Remove any debris that
may be tangled in the cutting reels. Keep the reel shaft
and bearing clean of grass or other debris buildup.
SAFETY SWITCH OPERATION - Check operation of all
safety switches. Do not use mower if safety switches are
disconnected or not operational, as dangerous conditions
will result.
OPERATION
The following is a description of the machine controls
and their function.
A. Main Clutch Lever
WARNING
the drive when stopping or leaving the machine.
Engage slowly before full
engagement. Always disengage
Engages power for
travel and mowing. Down
position is disengaged
and up position is
engaged.
The engine clutch lever has an electrical interlock and
engine will not start if clutch is engaged. For added
safety, the interlock system should be checked
periodically to ensure that it is adjusted to function
properly.
B. Engine Throttle Lever – Regulates mowing and
travel speeds. Moving the control handle back will reduce
engine speed for starting and idling engine. Push forward
to increase engine speed. Never travel at speeds faster
than required for proper mowing.
C. Wing Cutting Unit Clutch Lever – Engages drive to
Wing Cutting Units. Pull lever back and down to engage.
Never engage drive unless Wing Cutting Units have
been lowered to cutting position.
Engine Choke Lever (No photo) - Located near the
upper rear right corner of the engine. Use the choke
when starting a cold engine. See the engine manual for
engine starting information and proper use of the choke.
14
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Page 15
OPERATION
NATIONAL 68 SR & DL TRIPLEX
®
D. Transport Clutch (Model 68 DL only)
WARNING
UNITS ARE TURNING OR WHEN THE
DIFFERENTIAL SHIFT IS IN REVERSE.
Operate the transport clutch by slowly pressing the pedal
with your left foot. Releasing the pedal will cause the
mower to coast to a stop, or resume mowing speed.
E. Wing Cutting Unit Latch
NEVER USE THE TRANSPORT
CLUTCH WHILE THE CUTTING
Use this clutch to travel
between mowing sites at
speeds faster than those
obtained with the main
clutch. Before using,
disengage the cutting unit
clutches and raise the
cutting units to their
transport position.
G. Rear Cutting Unit Clutch
Engages drive to the Rear
Cutting Unit.
Pull lever forward and
toward the center of the
machine to engage sliding
jaw clutch.
To disengage, pull lever
forward and out to engage
locking pin.
Never engage the drive
unless the rear cutting unit
has been lowered to the
cutting position.
H. Rear Cutting Unit Lift Arm
Raises rear mower to the
transport position. Pull
handle up, forward and
over center to lock it in
the up position.
WARNING
The Wing Cutting Units should be latched in their elevated
position whenever the mower is being transported or in
storage.
To release the latch, lift the handle until the latch (E)
swings upward into a nearly vertical position, then carefully
lower the cutting unit onto the ground. Avoid dropping the
cutting unit, as damage may result to the cutting unit, the
mower, or your turf.
NEVER ATTEMPT TO RAISE THE
WING CUTTING UNITS WHEN
THE WING MOWER CLUTCH IS
ENGAGED.
If needed, push the latch
(E) down to a generally
horizontal position. Grasp
the Wing Cutting Unit lift
handle (not shown) and
raise the cutting unit until
the latch (E) engages the
lift arm socket (F).
J. Seat Position Adjuster Lever
WARNING
The seat may be moved forward or backward to suit the
operator. Pull the lever near the front left corner of the
seat outward to release the slide mechanism. After
moving the seat to a comfortable position, release the
lever to lock the slide mechanism.
.
DO NOT OPERATE THE SEAT
SLIDE MECHANISM WHILE THE
MOWER IS MOVING
68OM-06/03
15
Page 16
OPERATION
K. Ignition Switch (Model 68 DL shown)
CAUTION
engine. Turn the switch counterclockwise to shut off the
engine.
The 68 SR ignition switch (not shown) is located on the
steering column. It is a two-position switch.
Turn the key clockwise to activate the electrical system
and allow the engine to be started. Turn the switch
counterclockwise to shut off the engine.
ALWAYS SHUT OFF THE ENGINE
AND REMOVE THE KEY BEFORE
LEAVING THE MOWER SEAT.
The 68 DL ignition
switch is located on
the instrument
cluster. It is a threeposition switch.
Turn the key
clockwise to the
middle position to
activate the electrical
system. Turn the key
to the full clockwise
position to start the
M. Parking Brake Lever
Provides a lock for the brake. Push brake lever forward,
over center, to lock. Pulling brake lever back, toward the
rear of the machine will disengage the brake.
N. Service
Brake
Depress the Service Brake foot
pedal to slow the
mower and lock
the rear wheels
in the full stop
position.
Note: It is best to
slow the mower
with the throttle and then disengage clutch lever before
applying brake. This prevents excessive wear and engine
overload.
SAFETY SWITCHES
L. Differential Shift Lever
WARNING
result. Always disengage engine clutch before attempting to shift.
ter of the machine to clear the notch in the stop disc and
positioned securely in the new notch.
Never shift while machine is in motion, as damage to the gears could
Located on
the mower
differential,
this control
has three positions: Forward, Neutral (center
position),
and Reverse. The
lever must be
pulled toward the cen-
Your National 68 mower is equipped with safety switches
to monitor the operating conditions of certain machine
functions and stop the mower whenever unsafe conditions
are found.
It is necessary for both the main engine clutch and the
wing cutting unit clutch to be in their neutral position to
start the engine. The 68 DL also requires the operator be
in the seat. The 68 SR does not require the operator to be
in the seat to facilitate use of the hand recoil starter.
If you encounter difficulties starting the mower’s engine,
or keeping it running, check the chart in the Safety
Switches section of this manual to make sure you are not
causing the engine to kill or become unable to start.
16
68OM-06/03
Page 17
NATIONAL 68 SR & DL TRIPLEX
®
HEIGHT OF CUT ADJUSTMENT
DANGER
ignition key, and disconnect the engine spark plug
wire prior to making any of the following adjustments.
1. STANDARD ADJUSTERS
The height of cut is variable and may be adjusted on both
wing cutting units and the rear cutting unit by loosening
the top and bottom Adjusting Nuts (A) which hold Roller
Adjusters (B) in Roller Brackets (C). Roller (D) may then
be moved up and down.
It is important to get all rollers adjusted to the same height
so that there will be uniform cutting across the entire width
of the cutting unit. Do not adjust by sight. Place the mower
on a hard, level surface and place a board or gauge plate
of the desired height under each bed knife back bar. Allow
the rear roller to rest on the level surface. Retighten the
adjusting nuts and remove the gauge plate or board.
To assure safety, disengage the
engine clutch lever, remove the
2. DIAL-A-HEIGHT ADJUSTERS (OPTIONAL)
To set the height of cut, lift the vinyl cap and socket (A) off
the adjuster tube. To raise the height of cut, turn the
socket clockwise (viewed from above). To lower the
height of cut, turn the socket counterclockwise. Each
quarter turn (90°) of the socket will raise or lower the
height of cut by approximately 1/32". A full turn (360°) will
raise or lower the height of cut approximately 1/8".
When making large adjustments (over 1/2"), make small
adjustments to each side until the desired change is
reached. When the desired height is achieved, lower the
socket and make sure the adjuster tube locks it in position.
The scale decal (C) on the rear side of the adjuster
indicates the height of cut. To use it, sight along the
bottom edge of the adjuster tube (B). The reading on the
scale is your approximate height of cut.
You should determine the exact settings by test mowing
your turf. If very accurate cutting heights are required,
place the cutting units on a hard, level surface and place
a board or other gauge plate of the desired height under
each bed knife backing bar. Lower the rollers to the level
surface. When completed, make sure the socket is
locked in position over the adjuster tube.
STANDARD HEIGHT ADJUSTER
NOTE: Guards removed or cut away to show detail
68OM-06/03
DIAL-A-HEIGHT ADJUSTER (OPTIONAL)
OTHER ADJUSTMENTS
For other machine adjustments, see the Maintenance
section of this manual.
17
Page 18
MAINTENANCE
LUBRICATION
Lubricate the machine at the recommended locations and
intervals using the proper lubricants to ensure maximum
service and long life of your machine.
Lubrication locations must be free of dirt and grass
clippings and be well lubricated for proper operation.
The location and number of all lubricating points are listed
in the chart below. The type and frequency of lubrication
is specified. Use the following photos to locate the
lubrication points on the mower.
DIFFERENTIAL
Since the mower does not operate at high speeds, the
grease level in the differential is not critical providing that
there is sufficient grease to coat the gears. Unless
METIREBMUNDNANOITACOLEPYTYCNEUQERF
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2)2(nipgnikgnireetSesaerGsruoh52
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4)2(nmulocgnireetSesaerGsruoh52
leakage is evident, it is recommended that the grease be
checked once each year. Check grease level by loosening
the bolts in the differential case flanges and spreading
case halves. It is not necessary to totally disassemble the
case or remove the wheels for this inspection. Add Multipurpose Gear Grease such as Pennzoil No. 303 or
equivalent if necessary. Total grease capacity is 1-1/2
pounds (0.68 kg).
CAUTION
Do not use oil in the differential case
in place of grease–it will leak through
the seals.
ENGINE
Refer to the engine manual (separately furnished) for
proper lubrication and maintenance instructions.
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71)1(tovipmratfilrewomraeResaerGsruoh52
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12)4(nipmratfilrewomgniWesaerGsruoh52
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18
32)6(tfahsdedaerhtretsujdarettucfothgieHesaerGderiuqersaroylraeY
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68OM-06/03
Page 19
LUBRICATION POINTS
NATIONAL 68 SR & DL TRIPLEX
®
1. Front wheel bearing
2. Steering Kingpin
3. Front axle pivot
4. Steering column (2 places)
5. Brake pedal pivot
6. Idler pivot bracket (68 DL only)
9. Upper countershaft
10. Lower countershaft
7. Main clutch handle
8. Wing mower clutch handle
68OM-06/03
11. Wing mower pull rod (2 places)
19
Page 20
MAINTENANCE
LUBRICATION POINTS
18. Rear mower pivot tube
12. Rear axle (2 places)
13. Differential input tube
14. Brake drum tube
15. Main axle tube
16. Seat Hinge
19. Rear mower countershaft (2 places)
20. Rear mower clutch
17. Rear mower lift arm pivot
20
21. Wing mower lift arm (2 places)
68OM-06/03
Page 21
LUBRICATION POINTS
22. Cutting reel bearing (6 places)
23. Height of cut adjuster (6 places)
NATIONAL 68 SR & DL TRIPLEX
®
Dial-A-Height adjusters (optional)
24. Threaded shaft (6 places)
25. Swivel block (6 places)
Belt clutch arm pivot arms (68 DL only)
26. Belt clutch idler arm
27. Transport clutch foot pedal
68OM-06/03
21
Page 22
MAINTENANCE
DANGER
ignition key, and disconnect the engine spark plug
wire prior to making any of the following adjustments.
DANGER
very sharp. Reels rotate freely and rotating one reel
can cause other reels to rotate. Special care should be
taken in the area where the reel contacts the bed knife.
REEL TO BED KNIFE ADJUSTMENT
The reel is adjusted to a fixed position bed knife. This
construction allows a more rugged and durable frame and
retains the proper adjustment longer. The Reel Adjuster
Bolt (A) regulates reel distance from the bed knife.
To reduce the distance, turn the upper hex adjuster nut on
each side of the reel down. Proceed slowly and do not
over-adjust -- use about 1/8 of a turn on each side at first.
To assure safety, disengage the
engine clutch lever, remove the
Handle reel assemblies carefully
with protective gloves. Reels are
Do not adjust one side more than the other unless the reel
is obviously out of alignment. Do not get the reel so tight
that it is hard to turn by hand. A too tight reel will wear
faster.
Ideally, the reel should “wipe” or lightly touch the bed
knife. It is not necessary to adjust or change the position
of the lower adjustment nut.
Proper cutting action may be tested by holding paper
strips between the reel and the bed knife. Turn the reel by
hand and check to see if the assembly cuts the paper all
the way across the width of the bed knife. Make sure that
the adjusting and the locking nuts on both side are
tightened securely.
REEL END PLAY ADJUSTMENT
Test for end play periodically by trying to move the reel
from side to side in the frame. If there is ANY movement,
adjust the bearings by loosening the lock nut on the
adjustment bolt (B) which is located on the inside right end
of the reels, and turning the adjustment bolt IN one half
turn or less. Do not overtighten. An overtightened bearing
will cause excessive bearing wear. Test again for end
play and if reel is rotating freely and end play is not
noticeable, tighten the lock nut.
REEL ADJUSTMENTS
HEIGHT OF CUT ADJUSTMENT
Refer to "Height of Cut Adjustment" in the Operation
section of this manual.
BRAKE ADJUSTMENT
The foot brake is properly adjusted if it slows the machine
when depressed and can be locked when the pedal is
depressed fully.
Adjust brake tension by removing cotter pin and brake
pedal pin and turning brake clevis located under pedal on
brake rod. When adjustment is complete, attach clevis to
pedal with pin and cotter pin.
NOTE: Guards removed or cut away to show detail
22
68OM-06/03
Page 23
ADJUSTING DRIVE BELT TENSION
A belt adjusted for proper tension can be deflected slightly
at a point midway between the pulleys. An over-tight belt
will cause excessive bearing wear and an under-tight belt
allows slipping, causing excessive belt wear.
IMPORTANT: Never allow oil to get on the belt which
could cause slipping.
NATIONAL 68 SR & DL TRIPLEX
®
WING CUTTING UNIT DRIVE BELT TENSION
Adjust tension by loosening set screw (B) in the wing
mower pull arm, sliding the Cutting Unit rearward and
retightening set screw.
MAIN DRIVE BELT TENSION (Main Countershaft to
Rear Drive)
Belt tension is increased by loosening the four bolts
holding the Upper Countershaft Housing (A) and sliding
the housing forward in the slotted frame holes.
NOTE - It will be necessary to remove belt guards to reach
the adjustment bolts. Also, if this belt is adjusted, it will be
necessary to readjust the engine belt. Replace all belt
guards before using the mower.
ENGINE DRIVE BELT TENSION (Engine to Main
Countershaft) (No photo)
Belt tension is increased by loosening the four engine
mounting bolts and sliding the engine forward in the
slotted frame holes. Test for the proper tension as detailed
in the section "Wing Cutting Unit Drive Belt Tension".
When tension is correct, tighten all the bolts securely.
FRONT
OF
MACHINE
REAR CUTTING UNIT DRIVE BELT TENSION
Spacers (A) are provided on the rear mower Pull Rod (B)
to adjust the belt tension. Remove Pin (C) from the end of
the pull rod and slip out the pull rod from the Pivot Tube
(D). Move as many spacers as necessary to the location
indicated and reassemble.
68OM-06/03
23
Page 24
MAINTENANCE
REAR CUTTING UNIT CHAIN TENSION
A chain drive is located on the left side of the rear cutting
unit. It maybe helpful to remove the Chain Shield (A) prior
to adjusting the chain tension.
Adjust the tension of the chain by loosening the 4 bolts (B)
on the rear cutting unit countershaft housing. Rotate the
countershaft housing (C) about the pivot line created by
the fixed bolts. The slots on the countershaft housing will
slide over the remaining two bolts. Rotate the countershaft
housing until proper chain tension is achieved. Tighten
bolts.
Proper tension is achieved when the chain is slightly
loose, but does not deflect more than 1/2" when pressed
in the middle of the span between the two sprockets.
BED KNIFE REPLACEMENT
DANGER
When the bed knife becomes damaged or too worn to
keep sharp, it must be replaced. Follow the procedure
below.
1. The backbar (A), bed knife (B) and fasteners (C,D) have
been assembled at the factory under tension. To ease
replacement and prevent misalignment of components, you may wish to clamp the leading edge of the
backbar in two or three places before removing the old
fasteners.
2. Remove the old shoulder nuts (C) and flat head screws
(D). If shoulder nuts are badly rusted or corroded, they
may have to be cut off and screws driven out to be
removed.
3. Clean the bottom surface of the backbar for maximum
metal contact with the new bed bar.
4. Fasten the new bed knife to the bottom of the backbar
in the position shown (bent edge up). Shoulder of
shoulder nuts (C) must be seated firmly in the backbar
and screws (D) must be flush with the bottom of the bed
knife.
Reels and bed knife are sharp. Wear
gloves to avoid cutting fingers on
sharp edges. Wear safety glasses
to protect eyes.
24
5. Torque shoulder nuts 35 to 40 ft-lbs.
68OM-06/03
Page 25
BACK LAPPING PROCEDURE
DANGER
Be extremely careful not to let the
brush, your fingers or your clothing
get caught in the reels. Wear gloves to avoid cutting
fingers on sharp edges. Wear approved safety glasses
to protect your eyes from flying particles and abrasives.
INTRODUCTION
Back lapping is a very important step in maintaining sharp
reel blades on the cutting units.
NATIONAL 68 SR & DL TRIPLEX
BACK GRIND IN THE
DIRECTION
OF THE ARROW
®
This procedure should be performed when the reel blades
and the bed knife become slightly rounded and the grass
is not cut cleanly with only a slight reel to bed knife
adjustment. Also, after grinding the bed knife and reels,
you should back lap to establish a perfect match between
the bed knife and reel blades.
RECOMMENDED STEPS
1. Adjust the reel to the bed knife so that the bed knife is
parallel to the reel and light contact is maintained.
2. Reels must be run in a reverse direction to be lapped.
Remove the lower drive belts and attach a back
lapping machine (not supplied by National Mower) to
the reels. Follow the instructions furnished by the
machine manufacturer.
3. Apply the lapping compound with the reels running,
using a 2" or a 3" (5 - 7.5 cm) brush. Apply the
compound evenly to the moving blades.
Many types of compounds are available for lapping. We
recommend a good pre-mixed water soluble compound.
Pre-mixed compound saves the time required to mix,
eliminates the waste of abrasive, rinses off easily with
water and is available in all grit ranges from coarse to
extra fine.
4. Stop the reel and examine both bed knife and reel
blades to see that the cutting edges are uniformly
sharp. If not, gradually tighten the reel adjuster bolts
(see "Reel to Bed Knife Adjustment" above) and
repeat Step 3 until the proper sharpness results.
O
25
Note position of
blades to reel
axis
GRINDING REELS
Reels must be ground at 25° in the direction shown by the
arrow in the figure. Back grind until reel blades are free
from roundness, dents and nicks. Spin grind to remove all
burrs. All blades must be on the same diameter.
O
5
O
5
GRINDING BED KNIVES
For maximum cutting efficiency, grind bed knife top and
front edges at 5° as shown in the figure.
5. Rinse off the compound thoroughly with water to
remove all abrasive. Check for sharpness and readjust
the bed knife if necessary. Reel to bed knife contact
should be adjusted to easily cut a sheet of paper (see
"Reel to Bed Knife Adjustment" above).
68OM-06/03
25
Page 26
MAINTENANCE RECORD
etaDksaTecnanetniaMnosreP
26
68OM-06/03
Page 27
TROUBLE-SHOOTING
NATIONAL 68 SR & DL TRIPLEX
®
DANGER
All adjusting must be made with the engine off.
Do not do any investigation of the working parts of the machine with the motor running.
Always turn the engine off!
Tractor Unit
Situation Things To Check
Engine will not start Turn ignition switch to on
Ensure that there is sufficient gasoline (petrol) in the tank
Make sure safety switches are making contact and mowing clutch is in
neutral
Look for a loose wire on ignition or spark plug wire not connected
Interlock system inoperative—check wiring, see "Electrical Diagrams"
Operator must be positioned on seat to depress safety switches
(Model 68 DL only)
Mower will not move Differential gear selector must be in one of the drive positions
Engine drive clutch must be engaged
Drive belts too loose (see "Drive Belt Tension" in Maintenance section)
Visually check to see that pulleys are not slipping on shafts
If everything above is OK, check for a damaged gear(s) in the differential
gear box
Mower will not stop Ensure that the main clutch is disengaged (brake will not stop engine)
Brake adjustment or service may be needed.
Cutting Units
Situation
Cutting units will not turn. Clutches may not be engaged
Look for anything that could be jammed between the reel and the bed knife
Drive belts or drive chain may need tightening
Visually check that both the drive pulleys and the shafts are rotating
Cutting units turn but Reel bed knife position may be out of adjustment (see "Reel to Bed Knife
will not cut Adjustment" in Maintenance section)
Drive belts or drive chain may need adjustment.
Visually check that both the drive pulleys and the shafts are rotating
Cutting units will not stop Disengage all clutches
turning
Uneven cut Set height of cut to the same height on each cutting unit (see "Cutting Height
Adjustment" in Operation section of this manual.)
Check to see if any part is bent
Something may be jammed in cutting unit pivots and/or lift pivots, preventing
the cutting units from floating
Things To Check
68OM-06/03
27
Page 28
PARTS LIST
FRAME & RUNNING GEAR
28
68OM-06/03
Page 29
NATIONAL 68 SR & DL TRIPLEX
®
FRAME & RUNNING GEAR
Item DescriptionPart No. Qty.
1
2
3
________________________________________________________________________________________________________________________________________
4
5
6
_______________________________________________________________________________________________________________________________________
7
8
9
________________________________________________________________________________________________________________________________________
10
11
12
______________________________________________________________________________________________________________________________________________
13
14
15
____________________________________________________________________________________________________________________________________________
16
200002
07018
200085
201961
06002
09014
200193
07038
200094
201427
201851
04003
200196
200033
06112
02602
02603
17
______________________________________________________________________________________________________________________________________________
18
19
20
_____________________________________________________________________________________________________________________________________________
21
22
23
________________________________________________________________________________________________________________________________________________
24
25
26
_____________________________________________________________________________________________________________________________________________
27
28
200863
200104
200139
07560
09217
200200
200199
200203
07034
07032
07036
200867
FRAME
REAR TIRE & WHEEL ASSEMBLY
FOOT REST, Left Hand
BUSHING, Axle Pivot
BUSHING, Spindle and Steering Post
DRAG LINK
KING PIN, Left Hand
TIRE & WHEEL
SHAFT, Steering
AXLE ASSEMBLY, Front
TIE ROD
PIN, Clevis Tie Rod
KING PIN, Right Hand
BUMPER, Front
BEARING, Wheel Hub
DUST CAP, 3/4'’ I.D.
DUST CAP, 7/8'’ I.D.
CLEVIS, Threaded, Tie Rod
PEDAL, Brake
FOOT REST, Right Hand
SWITCH, Interlock
GUARD, Main Belt
STEERING WHEEL
COLLAR, Steering Shaft
BRACKET, Throttle Control
SWITCH, Key, Briggs & Stratton and Kawasaki
THROTTLE CONTROL, (Includes conduit and wiring)
SEAT
BALL JOINT
1
2
1
2
6
1
1
2
1
1
1
1
1
1
4
2
2
1
1
1
1
1
1
1
1
1
1
1
2
68OM-06/03
29
Page 30
RUNNING GEAR & MISC. PARTS -- MODEL 68 DL
Item DescriptionPart No. Qty.
1 07065 KEY SWITCH 1
2 07064 AMPMETER 1
3 07063 HOURMETER 1
____________________________________________________________________________________________________
4 09098 DASHBOARD 1
5 09218 GUARD, Main Belt 1
6 200200 STEERING WHEEL 1
____________________________________________________________________________________________________
7 09101 COVER, Battery 1
8 201754 HOLDOWN, Battery 1
9 201582 BATTERY BOX 1
____________________________________________________________________________________________________
10 202447 ROD, Side Post Battery 2
11 201925 FOOT REST, Left 1
12 07038 TIRE, Deluxe Wide 2
____________________________________________________________________________________________________
13 07560 INTERLOCK 1
30
68OM-06/03
Page 31
NATIONAL 68 SR & DL TRIPLEX
®
SEAT MOUNTING & BELT GUARDS
Item DescriptionPart No. Qty.
1 07101 ADJUSTER, Seat 1
2 200814 HINGE, Seat 2
3 205470 BRACKET, Seat Switch 1
_________________________________________________________________________________________________________________________________________
4 02614 WASHER 2
5 04512 SPRING, Seat 2
6 202249 TUBE, Pivot 1
_________________________________________________________________________________________________________________________________________
7 202251 HANDLE, Lifter 1
8 07039 GRIP, Handle 1
9 09218 GUARD, Main Belt (DL only) 1
_________________________________________________________________________________________________________________________________________
10 09213 SHIELD, Latch Hook, L.H. 1
1 1 09216 GUARD, Pulley (DL only) 1
_________________________________________________________________________________________________________________________________________
12 09100 GUARD, Engine Clutch (DL only) 1
13 205485 GUARD, Pulley 1
_________________________________________________________________________________________________________________________________________
14 09220 SHIELD, Latch Hook, R.H. 1
15 202343 ASSEMBLY, Seat Bracket 1
16 07325 SWITCH 1
_________________________________________________________________________________________________________________________________________
17 205459 PIVOT, Switch 1
18 202798 SPRING, Return 1
19 205460 ARM, Spring 1
_________________________________________________________________________________________________________________________________________
20 200123 BUSHING 1
09217 GUARD, Main Belt (SR only) 1
09002 GUARD, Engine Clutch (SR only) 1
68OM-06/03
31
Page 32
DRIVE MECHANISM -- UPPER PORTION
32
68OM-06/03
Page 33
DRIVE MECHANISM -- UPPER PORTION
NATIONAL 68 SR & DL TRIPLEX
®
Item Description
1
2
3
_
_____________________________________________________________________________
4
5
6
______________________________________________________________________________
7
8
9
______________________________________________________________________________
10
11
12
______________________________________________________________________________
13
14
15
______________________________________________________________________________
16
17
18
______________________________________________________________________________
19
20
21
______________________________________________________________________________
22
23
24
______________________________________________________________________________
25
26
27
______________________________________________________________________________
28
29
30
______________________________________________________________________________
31
Part No.
200530
03607
03608
200179
200176
200172
200173
202445
201541
201538
200165
08021
202437
200162
03609
03903
200208
200184
04501
200163
07024
09002
03606
200157
03902
04013
02602
06006
200154
200158
03901
GUIDE, Belt, High Speed Pulley
PULLEY, Countershaft Idler
IDLER, Engine Clutch
ARM, Engine Clutch
ARM, Countershaft Idler
ROD, Countershaft Idler Control
BRACKET, Idler Pivot
STUD, Belt Guide
BELT GUIDE, Lower
BELT GUIDE, Upper
ROD, Main Clutch, Upper
ROD, Main Clutch, Lower
SPRING
COLLAR, Lock
PULLEY, Motor
BELT, Engine, Kawasaki, 6844 Gates Rated
KEY, Square, Engine
ARM, Main Belt Idler
SPRING, Main Belt Idler Arm
LEVER, Engine Clutch
KNOB, Clutch Lever
GUARD, Engine Clutch
PULLEY, Main Countershaft
COUNTERSHAFT, Main
BELT, Drive, B66
KEY, Woodruff, #11
DUST CAP, 3/4" I.D.
BUSHING, Main Countershaft Housing
HOUSING, Main Countershaft
STEP PULLEY, Main Countershaft
BELT, Countershaft, A29
Qty.
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
2
1
1
1
______________________________________________________________________________
68OM-06/03
33
Page 34
DRIVE MECHANISM -- MIDDLE PORTION
Item DescriptionPart No. Qty.
1
2
3
________________________________________________________________________________________________________________________________________
4
5
6
_______________________________________________________________________________________________________________________________________
7
8
9
________________________________________________________________________________________________________________________________________
10
11
12
______________________________________________________________________________________________________________________________________________
13
14
15
____________________________________________________________________________________________________________________________________________
16
203622
07023
205486
07325
02288
205471
205472
205477
200172
202437
200182
200170
04552
200676
205451
04056
34
SHIELD, Engine
GRIP, Lever, '96 and up
LEVER, Lower Countershaft Control
SWITCH, Control
U-NUT, 1/4-20
BRACKET, Muffler Guard, L.H.
BRACKET, Muffler Guard, R.H.
GUARD, Muffler
ROD, Countershaft Idler Control (shown for reference only)
SPRING
COLLAR, Lock
ROD
SPRING, Lift Latch
BUSHING
HOOK, Wing Mower
ROLL PIN, 0.25 x 1.12
1
1
1
2
2
1
1
1
1
2
2
1
2
4
2
2
68OM-06/03
Page 35
NATIONAL 68 SR & DL TRIPLEX
®
DRIVE MECHANISM -- LOWER PORTION
Item Description
1
2
3
________________________________________________________________________________________________________________________________________
4
5
_______________________________________________________________________________________________________________________________________
6
7
8
________________________________________________________________________________________________________________________________________
9
10
11
______________________________________________________________________________________________________________________________________________
12
13
14
____________________________________________________________________________________________________________________________________________
15
16
17
______________________________________________________________________________________________________________________________________________
18
19
20
_____________________________________________________________________________________________________________________________________________
21
22
23
Part No.
03615
06105
205482
205481
04056
02614
205458
200123
02614
202798
200137
205461
02602
205454
07226
200135
03901
03603
200136
205462
07325
04505
200151
201880
PULLEY, Lower Countershaft
BEARING, Lower Countershaft
CARRIER, Lower Countershaft (Model 68SR only)
CARRIER, Lower Countershaft (Model 68DL only)
ROLL PIN, 0.25 x 1.12
WASHER
PIVOT, Switch, R.H.
BUSHING
WASHER
SPRING
PULL ANGLE, Wing Mower, Rear
PIVOT, Switch, L.H.
DUST CAP, 3/4" I.D.
PULL ARM, Wing Mower, Left and Right Hand
GRIP, Wing Mower Arm
COUNTERSHAFT, Lower
BELT, Countershaft, A29
PULLEY, Lower Countershaft Drive
BELT GUIDE, Pulley
BRACKET, Switch Mounting
SWITCH, Control
SPRING, Wing Mower Pull Rod
PULL ROD, Wing Mower
PIN, Wing Mower Arm
Qty.
2
2
1
1
2
1
1
1
1
2
1
1
2
1
1
1
1
1
1
2
2
1
1
1
68OM-06/03
35
Page 36
DRIVE MECHANISM -- MODEL 68 DL
36
68OM-06/03
Page 37
NATIONAL 68 SR & DL TRIPLEX
®
DRIVE MECHANISM -- MODEL 68 DL
Item DescriptionPart No. Qty.
1 09100 GUARD, Engine Clutch 1
2 201881 RETAINER, Mowing Belt 1
3 201884 RETAINER, Transport Belt 1
_________________________________________________________________________________________________________________________________________
4 201890 MOUNT, Belt Guides 1
5 201872 STEP PULLEY, Main Countershaft 1
6 03603 PULLEY, Transport, Main Countershaft 1
_________________________________________________________________________________________________________________________________________
7 02507 Washer, 10 GA. 2
8 03502 O-RING, 7/8" Dia. 2
9 06101 NEEDLE BEARING 2
_________________________________________________________________________________________________________________________________________
10 03902 BELT, Drive, B66 1
11 03655 PULLEY, Main Countershaft 1
12 04013 KEY, Woodruff, #11 3
_________________________________________________________________________________________________________________________________________
13 201871 COUNTERSHAFT, Main 1
14 201740 HOUSING, Main Countershaft 1
15 200208 KEY, Square, Engine 2
_________________________________________________________________________________________________________________________________________
16 03926 BELT, Engine, Transport, 6841 Gates Power Rated 1
17 03602 PULLEY, Engine, Transport Belt 1
18 03903 BELT, Engine, Mowing, 6844 Gates Power Rated 1
_________________________________________________________________________________________________________________________________________
19 03609 PULLEY, Engine, Mower Belt 1
20 202780 BELT GUIDE WELDMENT, Engine 1
21 202446 STUD, Belt Guide 1
_________________________________________________________________________________________________________________________________________
22 201946 BRACKET, Idler Pivot with Bushings 1
23 200530 GUIDE, Belt 1
24 202441 SPRING, Transport Pedal Return 1
_________________________________________________________________________________________________________________________________________
25 03608 PULLEY, Idler 1
26 201721 FOOT LEVER 1
27 201728 ARM, Idler, Lower Countershaft 1
_________________________________________________________________________________________________________________________________________
28 201730 ARM., Idler, Mowing Belt 1
29 03607 PULLEY, Clutch Lever 1
30 201718 PULLEY LEVER, Transport 1
_________________________________________________________________________________________________________________________________________
31 201889 GUIDE, Belt 1
32 201919 ROD, Transport Clutch 1
33 202440 SPRING, Transport 1
_________________________________________________________________________________________________________________________________________
34 201966 PEDAL, Transport 1
35 205481 CARRIER, Lower Countershaft 1
_________________________________________________________________________________________________________________________________________
68OM-06/03
37
Page 38
REAR AXLE & DIFFERENTIAL
38
68OM-06/03
Page 39
NATIONAL 68 SR & DL TRIPLEX
®
111111111
Qty.
RETAINING RING, Pinion gear
BULL GEAR ASSEMBLY, Complete
SHAFT UNIT, Intermediate
WASHER, 1-1/8" I.D.
SLEEVE, Axle Bearing
BEARING, Right Axle
SPACER, Right Axle
Description
09012
200066
Part No.
200070
02607
200088
SEAL, Rear Axle
06103
02510
1
ARARAR
WASHER, Bearing, Left Axle, 1-1/8"
BEARING, Left Axle
SHIM, Left Axle, 10 Ga.
SHIM, Left Axle, 14 Ga.
03510
02510
06104
200687
200821
111141111111111111111
AR
SPACER, Left Axle, 1/32"
SHIM, Axle Spacer, 22 Ga.
COLLAR, Rear Axle
CAP, Left Axle
WHEEL HUB, Left Rear
PIN, Collar, Rear Axle, 1/4" x 1-3/4"
KEY, Woodruff, #11
200685
200688
200095
200096
200090
04016
04013
LOCK RING, 7/8"
BRAKE BAND ASSEMBLY
O-RING, 7/8"
DUST CAP, 7/8"
PULLEY, Step
BRAKE DRUM
KEY, Woodruff, #9
SHAFT, Shifting Countershaft
LOCK RING, 3/4"
04020
200099
03502
02603
03618
200097
04012
200055
04011
__
LEVER, Brake Band
DUST CAP, 3/4"
O-RING, 3/4"
COUNTERSHAFT CARRIER UNIT, Shifting
CARRIER, Shifter
BUSHING, Shifter Lever
SPRING
200102
02602
03511
200056
200063
200676
04547
3637383940414243444546
Item
Qty.
___________________________________________________________________________________________________________________________________________________
___________________________________________________________________________________________________________________________________________________
___________________________________________________________________________________________________________________________________________________
111111112111112111111114111211111
47
___________________________________________________________________________________________________________________________________________________
REAR AXLE & DIFFERENTIAL
SPRING, Shifter Lever
BUSHING, Shifter Lever Bushing
SHIFTER LEVER
GRIP, Shifter
CLEVIS, Brake
PIN, Brake Pedal, 3/8" x 1-1/4"
STOP DISC, Shifter
ROD UNIT, Brake
NEEDLE BEARING, Rear Countershaft
U-BOLT, Shifter
BRACKET,Parking Brake Pull
ROD, Formed, Parking Brake
LEVER, Parking Brake
484950515253545556575859606162636465666768
___________________________________________________________________________________________________________________________________________________
BUSHING
NEEDLE BEARING, Intermediate Shaft
__________________________________________________________________________________________________________________________________________________
GASKET, Back Plate Cover
COVER, Differential Case, Inside
SLIDING WASHER, Differential Case
___________________________________________________________________________________________________________________________________________________
PIN, Spring (Roll PIn), 5/16" x 1-1/8"
GEAR, Shifting, 11 Tooth
GEAR, Reverse
___________________________________________________________________________________________________________________________________________________
BUSHING, Reverse Gear
SHAFT, Reverse Gear
PINION, Differential
GASKET SET, Differential
COVER, Differential Case, Outside
HUB, Rear Wheel, Right
___________________________________________________________________________________________________________________________________________________
___________________________________________________________________________________________________________________________________________________
BUSHING, Rear Wheel Hub
DUST WASHER, 1-1/8"
O-RING, 1-1/8"
_________________________________________________________________________________________________________________________________________________
SPLIT DISC SEAL, Wheel Hub, Right Rear
SEAL, Oil
AXLE ASSEMBLY, Rear
2
BUSHING, Bull Gear
68OM-06/03
Part No. Description
04502
200675
205434
07007
04021
123456789
Item
___________________________________________________________________________________________________________________________________________________
04022
200061
___________________________________________________________________________________________________________________________________________________
200103
06102
08010
201432
08037
205450
200676
06101
07003
200234
200051
04008
200054
200050
06003
200049
200069
07009
200065
200079
06005
200680
03504
10111213141516171819202122232425262728293031323435
___________________________________________________________________________________________________________________________________________________
___________________________________________________________________________________________________________________________________________________
___________________________________________________________________________________________________________________________________________________
__________________________________________________________________________________________________________________________________________________
___________________________________________________________________________________________________________________________________________________
___________________________________________________________________________________________________________________________________________________
___________________________________________________________________________________________________________________________________________________
___________________________________________________________________________________________________________________________________________________
200084
03503
200075
06004
___________________________________________________________________________________________________________________________________________________
39
Page 40
WING CUTTING UNITS
NOTE — Skids and Reel End Shields are not shown.
See parts page "Skids, Reel End Shields & Guards"
40
68OM-06/03
Page 41
NATIONAL 68 SR & DL TRIPLEX
®
WING CUTTING UNITS
Item DescriptionPart No. Qty.
1 201513 BRACKET, Shield 4
2 200235 UPRIGHT, Shield 4
3 204497 ROLLER, 21" 2
__________________________________________________________________________________________________________________________________
4 203248 ROLLER BRACKET, L.H. 2
5 204495 ADJUSTER, Roller 4
6 201775 FRAME, Bed Knife, Bolt-on 2
__________________________________________________________________________________________________________________________________
7 02109 SCREW, Flat Head 14
201802 NUT, Bed Knife Screw 14
8 201504 BED KNIFE, 21", 2
__________________________________________________________________________________________________________________________________
9 04549 SPRING, Reel Adjusting 2
10 200236 REEL TAKE-UP ASSEMBLY 4
11 302550 REEL CARRIER ASSEMBLY, Left Hand 2
__________________________________________________________________________________________________________________________________
12 06120 BEARING, Reel, (Includes Race) 4
13 200296 REEL ASSEMBLY, 6 Blade 2
14 201781 FRAME, Wing Mower 2
__________________________________________________________________________________________________________________________________
15 200256 ADJUSTING SCREW & NUT, Bearing 2
16 201437 TAKE-UP WASHER, Reel Bearing 2
17 201383 CAP SCREW (Special), Pulley Scraper 2
__________________________________________________________________________________________________________________________________
18 200287 PULLEY SCRAPER 2
19 302549 REEL CARRIER ASSEMBLY, Right Hand 2
20 03931 BELT, Wing Cutting Unit (Gates A34) 2
__________________________________________________________________________________________________________________________________
21 03601 PULLEY 2
22 201520 SHIELD, Right Hand 1
__________________________________________________________________________________________________________________________________
23 202261 SHIELD, Belt, L.H. 1
24 203172 ROLLER BRACKET, R.H. 2
201521 SHIELD, Left Hand 1
202260 SHIELD, Belt, R.H. 1
68OM-06/03
41
Page 42
NOTE — Skids and Reel End Shields are not shown. See parts
page "Skids, Reel End Shields & Guards"
42
REAR CUTTING UNIT
68OM-06/03
Page 43
Qty.
Description
NATIONAL 68 SR & DL TRIPLEX
®
Part No.
25 302550 REEL CARRIER ASSEMBLY, Left Hand 1
26 200223 FRAME, Rear Mower 1
27 07481 CHAIN, Roller, Rear Mower 1
28 203452 LIFTER TEE, Rear Mower 1
29 200214 BRACKET, Guard 1
30 202301 BRACE, Seat 1
Item
________________________________________________________________________________________________________________________________________________
31 200271 SHIFTER YOKE, Rear Mower 1
_______________________________________________________________________________________________________________________________________________
Qty.
REAR CUTTING UNIT
32 03905 BELT, Rear Mower, A42 1
33 200388 SHIFTER LUG 1
34 05022 PIN, Clutch 2
35 200273 BRACKET, Clutch Lever 1
______________________________________________________________________________________________________________________________________________
36 202438 SPRING 1
37 200276 LEVER, Clutch Shifter 1
38 07022 GRIP, Shifter Clutch 1
_________________________________________________________________________________________________________________________________________________
39 02602 DUST CAP, 3/4" I.D. 1
40 04506 SPRING, Clutch 1
41 200266 CLUTCH, Sliding Jaw, Rear Mower 1
_________________________________________________________________________________________________________________________________________________
42 200264 PULLEY ASSEMBLY, Countershaft 1
43 06007 BUSHING, Countershaft Pulley 1
44 200123 BUSHING, Pull Yoke 2
_______________________________________________________________________________________________________________________________________________
45 203172 ROLLER BRACKET, R.H. 1
46 04504 SPRING, Idler 1
47 200115 IDLER ARM UNIT, Rear Mower 1
48 03607 PULLEY, Idler 1
______________________________________________________________________________________________________________________________________________
49 201519 SHIELD, Rear Mower 1
_______________________________________________________________________________________________________________________________________
_______________________________________________________________________________________________________________________________________
(sold as a set with nut below)
68OM-06/03
Part No. Description
1 09170 GUARD, Clutch, Rear Mower, '96 and up 1
2 201513 BRACKET, Shield 2
Item
3 200235 UPRIGHT, Shield 2
________________________________________________________________________________________________________________________________________
06121 CUP, Reel Bearing 2
4 204498 ROLLER 1
5 204495 ADJUSTER, Roller Bracket 2
6 203248 ROLLER BRACKET, L.H. 1
7 200109 PULL YOKE, Rear Mower 1
8 200236 REEL TAKE-UP ASSEMBLY 2
9 200256 ADJUSTING SCREW & NUT, Bearing 2
10 200237 PIVOT TUBE, Rear Mower 1
11 200263 COUNTERSHAFT 1
12 06006 BUSHING, Countershaft 2
13 201735 REEL CARRIER ASSEMBLY, Right Hand 1
14 201437 TAKE-UP, Reel Bearing 2
15 200261 HOUSING, Countershaft, Rear Mower 1
16 03116 SPROCKET, Countershaft 1
17 04008 PIN, Sprocket Hub, 5/16" x 1-1/8" 1
18 03115 SPROCKET, Reel 1
19 200241 REEL ASSEMBLY, Rear Mower, 6 Blade 1
_______________________________________________________________________________________________________________________________________
________________________________________________________________________________________________________________________________________
______________________________________________________________________________________________________________________________________________
____________________________________________________________________________________________________________________________________________
20 06120 BEARING, Reel 2
______________________________________________________________________________________________________________________________________________
_____________________________________________________________________________________________________________________________________________
201802 NUT, Bed Knife Screw
21 02109 SCREW, Bed Knife 9
22 201773 BED KNIFE FRAME ASSEMBLY, Rear Mower 1
_____________________________________________________________________________________________________________________________________________
23 201407 BED KNIFE, 30" 1
24 04549 SPRING, Adjusting 2
______________________________________________________________________________________________________________________________________________
43
Page 44
SKIDS, REEL END SHIELDS & GUARDS
Item DescriptionPart No.
1 203728 SKID BAR, L.H. 1
2 202959 SHIELD, Wing Mower 3
3 201585 SKID, Mower 2
_________________________________________________________________________________________________________________________________________________
4 203727 SKID BAR, R.H. 2
5 202410 GUARD, Inside, Rear Mower 1
6 202281 CHAIN GUARD, Rear Mower 1
44
Qty.
68OM-06/03
Page 45
NATIONAL 68 SR & DL TRIPLEX
®
ROLLERS & STANDARD SCRAPERS
ROLLER ASSEMBLY (21") P/N 204497 (includes items 1-4)
ROLLER ASSEMBLY (30") P/N 204499 (Includes items 1-4)
ROLLER SCRAPER KIT P/N 860032 (includes items 5-8)
Item DescriptionPart No.
1 205330 CAP, Bearing 2
2 06142 BEARING, Roller 2
3 204500 SHAFT, Roller (21") 1
_______________________________________________________________________________________________________
204499 SHAFT, Roller (30") 1
4 204502 WELDMENT, Roller (21") 1
_______________________________________________________________________________________________________
5 02228 NUT, Jam, 5/16-24 12
6 205375 BRACKET, Roller Scraper, L.H. 3
7 09092 CABLE, Roller Scraper (21") 2
_______________________________________________________________________________________________________
8 205376 BRACKET, Roller Scraper, R.H. 3
9 204495 ADJUSTER, Roller (not included) -
_______________________________________________________________________________________________________
68OM-06/03
204501 WELDMENT, Roller (30") 1
09090 CABLE, Roller Scraper (30") 1
Qty.
45
Page 46
DIAL-A-HEIGHT™ ROLLER SCRAPER KIT, P/N 860033 (includes items 1-4)
Item DescriptionPart No.
1 205384 BRACKET, Cable Mounting, L.H. 3
2 04107 U-BOLT, 1/4-20 x 1.25 ID x 2.25 6
3 09092 CABLE, Roller Scraper, Wing Cutting Unit 2
_______________________________________________________________________________________________________
09090 CABLE, Roller Scraper, Rear Cutting Unit 1
4 205385 BRACKET, Cable Mounting, R.H. 3
46
Qty. per Kit
68OM-06/03
Page 47
NATIONAL 68 SR & DL TRIPLEX
®
DIAL-A-HEIGHT™ ROLLER ADJUSTER KIT, P/N 860034
Item DescriptionPart No. Qty. per Kit
1 205341 DECAL, Instruction 6
2 205348 ASSEMBLY, Roller Adjuster, L.H. 3
3 205380 WELDMENT, Roller Bracket, L.H. 3
_______________________________________________________________________________________________________
4 204991 PLATE, Scale 6
5 205346 DECAL, Wing Cutting Unit 4
_______________________________________________________________________________________________________
6
7 205349 ASSEMBLY, Roller Adjuster, L.H. 3
_______________________________________________________________________________________________________
68OM-06/03
205339 DECAL, Rear Cutting Unit 2
205381 WELDMENT, Roller Bracket, R.H. 3
47
Page 48
DIAL-A-HEIGHT™ ADJUSTER, P/N 205348 & 205349
Item DescriptionPart No.
1 204996 CAP, Vinyl 1
2 205334 WELDMENT, Threaded Rod 1
3 204995 SPRING 1
_______________________________________________________________________________________________________
4 205345 WELDMENT, Socket 1
5 205399 WELDMENT, Height of Cut Adjuster, R.H. 1
_______________________________________________________________________________________________________
6 204997 END, Swivel 1
_______________________________________________________________________________________________________
205400 WELDMENT, Height of Cut Adjuster, L.H. 1
48
Qty.
68OM-06/03
Page 49
SAFETY SWITCHES
NATIONAL 68 SR & DL TRIPLEX
®
DANGER
Never attempt to remove or
circumvent the safety switches.
Dangerous operating conditions may result.
Your National 68 mower is equipped with safety switches
to monitor the operating conditions of certain machine
functions and stop the mower whenever unsafe conditions
are found.
It is necessary for both the main engine clutch and the
wing cutting unit clutch to be in their neutral position to
start the engine. The 68 DL also requires the operator be
in the seat. The 68 SR does not require the operator to be
in the seat to facilitate use of the hand recoil starter.
enignEniaM
hctulC
DEGAGNEDEGAGNEFFONWODLLIKLLIK
gnittuCgniW
hctulCtinU
If you encounter difficulties starting the mower’s engine,
or keeping it running, check the chart below to make sure
you are not causing the engine to kill or become unable
to start.
With the engine off, and the ignition key removed, check
the switches regularly to make sure they are unobstructed
by grass clippings or other material. Make sure the
electrical terminals remain clean and dry and the pivot
mechanisms for each switch operate freely.
Never spray the mower safety switches directly with highpressure water.
hctiwStaeS
rotarepO(
)ecneserP
gnittuCgniW
tfiLtinU
smrA
PULLIKLLIK
LD86
enignE
esnopseR
LS86
enignE
esnopseR
NONWODNURNUR
PULLIKLLIK
LARTUENFFONWODLLIKLLIK
PULLIKLLIK
NONWODNURNUR
PUNURNUR
LARTUENDEGAGNEFFONWODNURLLIK
PULLIKLLIK
NONWODNURNUR
PULLIKLLIK
LARTUENFFONWODNUR
PUNUR
NONWOD
&TRATS
NUR
&TRATS
NUR
&TRATS
NUR
&TRATS
NUR
68OM-06/03
PU
&TRATS
NUR
&TRATS
NUR
49
Page 50
ELECTRICAL DIAGRAMS
MODEL 68 SR ELECTRICAL -- SAFETY SWITCH AND CIRCUIT DIAGRAM
50
MODEL 68 DL ELECTRICAL -- SAFETY SWITCH AND CIRCUIT DIAGRAM
68OM-06/03
Page 51
ELECTRICAL PARTS-- MODELS 68 SR & 68 DL
NATIONAL 68 SR & DL TRIPLEX
®
Part No.
Model 68 SR Model 68 DL
07034 07065 KEY SWITCH 1
07063 HOURMETER
________________________________________________________________________________________________________________________________________
07570 07580 HARNESS ASSEMBLY 1
_______________________________________________________________________________________________________________________________________
07325 07325 SWITCH, Safety 5
07560 INTERLOCK MODULE 1
_________________________________________________________________________________________________________________________________________
07064 AMPMETER 1
07104 GROUND WIRE, Battery 1
Description
*
BATTERY (Exide GT-H or equiv., 12V, U1, 235 CCA @ 0°F) 1
Qty.
*Note: Your mower may be equipped with a digital hour meter. This meter will
display a signal after 5 hours, and every 25 hours thereafter, recommending that
you change the engine oil and lubricate the mower.
1
68OM-06/03
51
Page 52
SPECIFICATIONS
MOWER DIMENSIONS & WEIGHT
Overall Length.............................................................................................. 79.13" (201 cm)
Width, Wing Mowers Folded .......................................................................... 61.8" (157 cm)
Width, Wing Mowers Down............................................................................... 76" (193 cm)
Height............................................................................................................ 39.37"(100 cm)
Weight (empty)............................................................................................ 659 lbs. (299 kg)
ENGINE – BRIGGS & STRATTON 138400 SERIES
Engine Type.............................. Forced Air Cooled, 4-cycle, Horizontal Shaft, OHV Engine
Number Of Cylinders ...................................................................................................... One
Piston Displacement .............................................................................. 13.1 cu. in. (215 cc)
Maximum Horsepower .................. 7.5 hp (5.6 kW)) / 3600 rpm (Corrected per SAE J1349)
Direction Of Rotation...............................Counterclockwise, facing the power take-off shaft
Maximum Speed ........................................................................................... 3600 ±100 rpm
Fuel ............................................................................................ Unleaded Gasoline (Petrol)
Fuel Tank Capacity ............................................................................... 4.80 US qt (4.5 liter)
Maximum Fuel Consumption ............................................................ 0.68 gal/hr (2.4 liter/hr)
Oil........................................................................................................... SAE 30 Engine Oil
Oil Capacity............................................................................................. 30 fl. oz. (0.90 liter)
Carburetor.............................................................................Float Type with Fixed Main Jet
Starter (68 SR)....................................Recoil Starter with Automatic Compression Release
Starter (68 DL) ................................................................. Electric Starter and Recoil Starter
Lubrication Type ......................................................................................................... Splash
Air Cleaner ....................................................................................................... Dual Element
Muffler ........................................................................................................... Low Tone Type
Alternator ................................................................................................... 12v 10 A (68 DL)
Net Weight (Engine).....................................................................................47 lbs (21.4 kg)
52
SOUND & VIBRATION LEVELS
Average Measured Sound Power.............................................................................. 99 dBA
Guaranteed Sound Power ....................................................................................... 105 dBA
Average Measured Sound Pressure, at operator position......................................... 87 dBA
Hand-Arm Vibration level ............................................................................ 3.79 m/sec2 rms
Whole Body Vibration level ......................................................................... 0.86 m/sec2 rms
68OM-06/03
Page 53
NATIONAL 68 SR & DL TRIPLEX
®
PARTS ORDERING INFORMATION
When ordering replacement parts, always furnish:
1. Your complete name, address, and phone number.
2. Model Number and Serial Number (stamped on the main frame rear axle gusset below seat)
3. Part Number (it is recommended that the correct number be verified with a current Master Price List).
4. The full Description of the part.
5. Quantity desired (quantity shown is the total number of parts contained in the particular view shown).
If the Part Number and the Description of your order do not agree, the Part Number will be used to fill your order.
Note: For your records and future ordering, fill in the following information:
desahcruPetaD
rebmuNledoM
rebmuNlaireS
emaNrotubirtsiD
sserddA
enohP
XAF
etiSbeW
nosrePselaS
V-BELT CROSS-REFERENCE CHART
noitcnuFrebmuNlanoitaNrebmuNrfMtleB
tfahsretnuoCrewoL1093092A
68OM-06/03
tleBniaM2093066B
hctulCniaM309304486setaG
tinUgnittuCraeR5093024A
)LD86(tropsnarT629301486setaG
)2(stinUgnittuCgniW1393043A
53
Page 54
National Mower Company
700 Raymond Avenue
St. Paul, Minnesota 55114, VS
CONFORMITEITSVERKLARING
Wij,
68 SR Triplex Mower en
68 DL Triplex Mower
met een maaibreedte van 173 cm (68 inch)
verklaren hierbij dat de volgende zelfrijdende
grasmaaimachines met (cilindervormige) rol:
98/37/EC
89/336/EEC
2000/14/EC (overeenkomstig Annex VI, “Interne
regeling van productie met evaluatie van technische
documentatie en periodieke controle”)
bij een GEMETEN geluidsniveau van 97 dB(A) en
een GEGARANDEERD geluidsniveau van 105 dB(A)
voldoen aan de specificaties van de volgende EU-
richtlijnen en hun huidige amendementen:
Societe Nationle de Certification et d’ Homologation
11, route de Luxembourg
L-5230 Sandweller
Naam & adres van op de hoogte gestelde instantie:
NATIONAL 68 SR & DL TRIPLEX
Geautoriseerde handtekening:
®
R. S. Kinkead III, President
Datum en plaats van verklaring:
National Mower Company
700 Raymond Avenue
St. Paul, Minnesota 55114, USA
DECLARACION DE CONFORMIDAD
Nosotros,
National Mower Company
DÉCLARATION DE CONFORMITÉ
Je soussigné,
68OM-06/03
Declaramos que los siguientes cortacéspedes de
carrete de montaje (cilíndrico):
700 Raymond Avenue
St. Paul, Minnesota 55114, États-Unis
Déclare que les tondeuses autoportées à lames
rotatives (cylindriques) suivantes :
Cortacésped 68 SR Triplex y
Cortacésped 68 DL Triplex
con un corte de 173 cm (68 inch) de ancho
se ajustan a las especificaciones de las siguientes
Tondeuse 68 SR Triplex et
Tondeuse 68 DL Triplex
d'une largeur de coupe de 173 cm (68 inch)
sont conformes aux spécifications des directives UE
98/37/EC
89/336/EEC
2000/14/EC (siguiendo el Anexo VI, Producción de
Control Interno con evaluación de documentación
técnica y revisión periódica)
instrucciones de la Unión Europea y sus reformas
actuales:
98/37/EC
89/336/EEC
2000/14/EC (notamment la « Procédure de contrôle
interne de la production avec évaluation de la
documentation technique et contrôle périodique »
visée à l'Annexe VI de la directive,
suivantes et des modifications y afférentes :
con un nivel MEDIDO de potencia del sonido de 97
dB(A), y
un nivel GARANTIZADO de potencia del sonido de
105 dB(A)
avec un niveau de puissance acoustique MESURÉ
de 97 dB(A) et
un niveau de puissance acoustique GARANTI
de105 dB(A).
Societe Nationle de Certification et d’ Homologation
11, route de Luxembourg
L-5230 Sandweller
Nombre y dirección de la organización notificada:
Société Nationale de Certification et d’Homologation
Nom et adresse de l'organisme notifié :
Firma Autorizada:
11, route de Luxembourg
L-5230 Sandweller
Signature autorisée :
R. S. Kinkead III, Presidente
Fecha, Lugar de la Declaración
R. S. Kinkead III, Président
Date et lieu de la déclaration
Marzo 27, 2003
St. Paul, Minnesota USA
Le 27 mars 2003
St. Paul, Minnesota, États-Unis
55
Page 55
National Mower Company
700 Raymond Avenue
St. Paul, Minnesota 55114, USA
KONFORMITÄTSERKLÄRUNG
Wir,
National Mower Company
700 Raymond Avenue
St. Paul, Minnesota 55114, USA
DECLARATION OF CONFORMITY
We,
68 SR Triplex-Mäher und
68 DL Triplex-Mäher
mit 173 cm (68 inch) Schnittbreite
erklären, dass die folgenden Aufsitz-Spindelmäher:
68 SR Triplex Mower, and
Declare that the following riding reel (cylindrical)
lawn mowers:
den technischen Angaben der folgenden EU-
68 DL Triplex Mower
with 173 cm (68 inch) cutting width
conform to the specifications of the following EU
98/37/EC
89/336/EEC
2000/14/EC (gemäß Anhang VI „Interne
Fertigungskontrolle mit Begutachtung der
technischen Unterlagen und regelmäßiger Prüfung“)
mit einem GEMESSENEN Schallleistungspegel von
97 dB(A) und
einem GARANTIERTEN Schallleistungspegel von
105 dB(A)
Richtlinien und ihren derzeitigen Anhängen
entsprechen:
98/37/EC
89/336/EEC
2000/14/EC (following Annex VI, “Internal Control of
Production with Assessment of Technical
Documentation and Periodical Checking”)
with a MEASURED sound power level of 97 dB(A),
and
a GUARANTEED sound power level of 105 dB(A)
Directives and their current amendments:
Société Nationale de Certification et d’ Homologation
Name & Anschrift der Anmeldebehörde:
Societe Nationle de Certification et d’ Homologation
Name & address of notified body:
11, route de Luxembourg
L-5230 Sandweller
Rechtsverbindliche Unterschrift:
11, route de Luxembourg
L-5230 Sandweller
Authorized signature:
R. S. Kinkead III, Generaldirektor
R. S. Kinkead III, President
27. März 2003
St. Paul, Minnesota USA
Datum, Ort der Erklärung
March 27, 2003
St. Paul, Minnesota USA
Date, Place Of Declaration
P. O. Box 14299
Tel. 651.646.4079
Fax: 651.646.2887
700 Raymond Avenue
www.nationalmower.com
Saint Paul, Minnesota 55114-0299
KONFORMITÄTSERKLÄRUNG
DECLARATION OF CONFORMITY
CONFORMITEITSVERKLARING
DÉCLARATION DE CONFORMITÉ
DECLARACION DE CONFORMIDAD
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