Jacobsen 67042 User manual

Parts & Maintenance
Manual
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1-INCLUDESITEMS3 - 16
GB
Tri King® Triplex Mower
67042 – 1800G Briggs Vanguard Engine
67043 – 1900D Kubota D662-EB Engine
2810632-Rev F

Copyright 2000 Textron Inc. “All rights reserved, including the
right to reproduce this material or portions thereof in any form.”
To Order Parts
1. Write your full name and complete address on the
order.
2. Explain where and how to make shipment.
3. Give product number, name and serial number that is
stamped on the name plate or serial plate of your prod-
uct.
4. Order by the quantity desired, the part number, paint
code, and description of the part as given in the parts
list.
5. Send or bring the order to an authorized Jacobsen
Dealer.
6. Inspect all shipments on receipt. If any parts are dam-
aged or missing, file a claim with the carrier before
accepting.
7. Do not return material without a letter of explanation,
listing the parts being returned. Transportation charges
must be prepaid.
Use of other than authorized parts will void the warranty.
This manual is designed for the Maintenance and Adjustment of this equipment.
Use the maintenance and adjustment instructions included in this manual and the operating
instructions included in the Safety and Operation Manual to service the machine.
The Safety and Operation Manual must be kept in the pouch on the back of the seat at all times
for reference by the operator.
Table of Contents
1 Safety
1.1 Operating Safety................................................. 4
1.2 Important Safety Notes .......................................5
2 Specifications
2.1 Product Identification .......................................... 6
2.2 Engine .................................................................6
2.3 Cutting Units: ......................................................6
2.4 Tractor ................................................................7
2.5 Weights and Dimensions ....................................7
2.6 Accessories & Support Literature .......................7
3 Adjustments
3.1 General ............................................................... 8
3.2 Fan Belt (Diesel Engines) ...................................8
3.3 Pump Drive Belt ..................................................8
3.4 Neutral and 3WD Switches .................................9
3.5 Parking Brake Switches ......................................9
3.6 Lift Limit Switch ...................................................9
3.7 Traction Pedal Neutral ......................................10
3.8 Traction Pedal Forward Stop ............................10
3.9 Lift / Lower Pedal Stop ......................................10
3.10 Parking Brake ...................................................11
3.11 Rear Lift Arm .....................................................11
3.12 Down Pressure .................................................11
3.13 Reel To Bedknife ..............................................12
3.14 Reel to Bedknife Adjustment ............................12
3.15 Cutting Modes ...................................................13
3.16 Cutting Height Adjustment ................................13
3.17 Removing the Cutting Unit ................................14
3.18 Cutting Height - Fixed Mode .............................14
3.19 Cutting Height - Floating Mode .........................15
3.20 Torque Specification .........................................16
3.21 Specific Torque .................................................16
4 Maintenance
4.1 General ............................................................ 17
4.2 Engine .............................................................. 17
4.3 Engine Oil ......................................................... 18
4.4 Gas Engine Air Filter ........................................ 18
4.5 Diesel Air Filter ................................................. 19
4.6 Fuel .................................................................. 19
4.7 Fuel System ..................................................... 19
4.8 Battery .............................................................. 20
4.9 Jump Starting ................................................... 20
4.10 Charging Battery .............................................. 20
4.11 Hydraulic Hoses ............................................... 21
4.12 Hydraulic Oil ..................................................... 21
4.13 Hydraulic Oil Filters .......................................... 22
4.14 Electrical System .............................................. 22
4.15 Muffler and Exhaust ......................................... 22
4.16 Tires ................................................................. 22
4.17 Wheel Mounting Procedure .............................. 23
4.18 Care and Cleaning ........................................... 23
4.19 Radiator ............................................................ 23
4.20 Backlapping ...................................................... 24
4.21 Storage ............................................................. 25
5 Troubleshooting
5.1 General ............................................................ 26
6 Maintenance & Lubrication Charts
6.1 General ............................................................ 27
6.2 Lubrication Chart .............................................. 27
6.3 Maintenance Charts ......................................... 28
7 Parts Catalog
7.1 Table Of Contents ............................................ 29
LITHO IN U.S.A. 5-2006

3
Suggested Stocking Guide
To Keep your Equipment fully operational and productive, Jacobsen suggests you maintain a stock of the more
commonly used maintenance items. We have included part numbers for additional support materials and training
aids.
To order any of the following material:
1. Write your full name and complete address on your
order form.
2. Explain where and how to make shipment:
❑UPS ❑Regular Mail
❑Overnight ❑2nd Day
3. Order by the quantity desired, the part number, and
the description of the part.
4. Send or bring the order to your authorized Jacobsen
Dealer.
How To Use This Manual
Abbreviations
N/S - Not serviced separately, can only be obtained by ordering main component or kit.
AR -Variable quantity or measurement is required to obtain correct adjustment.
Symbols such as ▲, next to the item number, indicate that a note exists which contain additional information
important in ordering that part.
Indented Items
Bulleted items indicate component parts that are included as part of an assembly or another component. These parts
can be ordered separately or as part of the main component.
Item Part No. Qty Description Serial Numbers/Notes
▲1 123456 1 Mount, Valve Indicates a piece part
2 789012 1 Valve, Lift Includes Items 2 and 3
3 345678 1 • Handle Serviced part included with Item 2
4 N/S 1 • Seal Kit Non serviced part included with Item 2
5 901234 1 Screw, 1/4-20 x 2” Hex Head
Service Parts
Service Support Material
Qty. Part No. Description Qty. Part No. Description
5000436 Fuel Filter, Gas Engine 549579 Hydraulic Oil Filter (2 Req’d)
5000441 Air Filter, Gas Engine 3001950 Pump Drive Belt
5000440 Oil Filter, Gas Engine 1001958 Ignition Key Switch
550489 Fuel Filter, Diesel Engine
5000913 Air Filter, Diesel Engine
502644 Oil Filter, Diesel Engine
Qty. Part No. Description
2810631 Safety & Operation Manual
2810632 Parts & Maintenance
3004386 Engine Parts Catalog
2810628 Video, Operator Training
Qty. Description
Service Manual

1 SAFETY
4
1 SAFETY
1.1 OPERATING SAFETY ______________________________________________________
1. Safety is dependent upon the awareness, concern and
prudence of those who operate or service the equip-
ment. Never allow minors to operate any equipment.
2. It is your responsibility to read this manual and all
publications associated with this equipment (Safety
and operation manual, engine manual, accessories
and attachments). If the operator can not read English
it is the owner’s responsibility to explain the material
contained in this manual to them.
3. Learn the proper use of the machine, the location and
purpose of all the controls and gauges before you
operate the equipment. Working with unfamiliar
equipment can lead to accidents.
4. Never allow anyone to operate or service the machine
or its attachments without proper training and
instructions; or while under the influence of alcohol or
drugs.
5. Wear all the necessary protective clothing and
personal safety devices to protect your head, eyes,
ears hands and feet. Operate the machine only in
daylight or in good artificial light.
6. Evaluate the terrain to determine what accessories and
attachments are needed to properly and safely perform
the job. Only use accessories and attachments
approved by Jacobsen.
7. Stay alert for holes in the terrain and other hidden
hazards.
8. Inspect the area where the equipment will be used.
Pick up all the debris you can find before operating.
Beware of overhead obstructions (low tree limbs,
electrical wires, etc.) and also underground obstacles
(sprinklers, pipes, tree roots, etc.) Enter a new area
cautiously. Stay alert for hidden hazards.
9. Never direct discharge of material toward bystanders,
nor allow anyone near the machine while in operation.
The owner/operator can prevent and is responsible for
injuries inflicted to themselves, to bystanders and
damage to property.
10. Do not carry passengers. Keep bystanders and pets a
safe distance away.
11. Never operate equipment that is not in perfect working
order or is without decals, guards, shields, discharge
deflectors or other protective devices securely fastened
in place.
12. Never disconnect or bypass any switch.
13. Do not change the engine governor setting or
overspeed the engine
14. Carbon monoxide in the exhaust fumes can be fatal
when inhaled. Never operate the engine without proper
ventilation or in an enclosed area.
15. Fuel is highly flammable, handle with care.
16. Keep the engine clean. Allow the engine to cool before
storing and always remove the ignition key.
17. Disengage all drives and engage parking brake before
starting the engine (motor). Start the engine only when
sitting in operator’s seat, never while standing beside
the unit.
18. Equipment must comply with the latest federal, state,
and local requirements when driven or transported on
public roads. Watch out for traffic when crossing or
operating on or near roads.
19. Local regulations may restrict the age of the operator.
20. Never use your hands to search for oil leaks. Hydraulic
fluid under pressure can penetrate the skin and cause
serious injury.
21. Operate the machine up and down the face of the
slopes (vertically), not across the face (horizontally).
22. To prevent tipping or loss of control, do not start or
stop suddenly on slopes. Reduce speed when making
sharp turns. Use caution when changing directions.
23. Always use the seat belt when operating tractors
equipped with a ROPS.
Never use a seat belt when operating tractors
without a ROPS.
24. Keep legs, arms and body inside the seating
compartment while the vehicle is in motion.
This machine is to be operated and maintained as specified in this manual and is intended for the professional
maintenance of specialized turf grasses. It is not intended for use on rough terrain or long grasses.
WARNING
EQUIPMENT OPERATED IMPROPERLY OR BY UNTRAINED PERSONNEL CAN BE DANGEROUS.
Familiarize yourself with the location and proper use of all controls. Inexperienced operator’s should receive
instruction from someone familiar with the equipment before being allowed to operate the machine.
!

SAFETY 1
5
1.2 IMPORTANT SAFETY NOTES ________________________________________________
This safety alert symbol is used to alert you to potential hazards.
DANGER - Indicates an imminently hazardous situation which, if not avoided, WILL result in death or serious injury.
WARNING - Indicates a potentially hazardous situation which, if not avoided, COULD result in death or serious
injury.
CAUTION - Indicates a potentially hazardous situation which, if not avoided, MAY result in minor or moderate injury
and property damage. It may also be used to alert against unsafe practices.
For pictoral clarity, some illustrations in this manual may show shields, guards or plates open or removed. Under no
circumstances should this equipment be operated without these devices securely fastened in place
By following all instructions in this manual, you will prolong the life of your machine and maintain its maximum
efficiency. Adjustments and maintenance should always be performed by a qualified technician.
If additional information or service is needed, contact your Authorized Jacobsen Dealer who is kept informed of the
latest methods to service this equipment and can provide prompt and efficient service. Use of other than original or
authorized Jacobsen parts and Accessories will void the warranty.
WARNING
The operator back-up system on this tractor prevents the tractor from starting
unless the brake lever is engaged, mower switch is off and traction pedal is in
neutral. The system will stop the engine if the operator leaves the seat
without engaging the parking brake or setting the mower switch off.
NEVER operate tractor unless the operator back-up system is working.
!
!
WARNING
1. Before leaving the operator’s position for any reason:
a. Return traction pedal to neutral.
b. Disengage all drives.
c. Lower all implements to the ground.
d. Engage parking brake.
e. Stop engine and remove the ignition key.
2. Keep hands, feet, and clothing away from moving parts. Wait for all
movement to stop before you clean, adjust or service the machine.
3. Keep the area of operation clear of all bystanders and pets.
4. Never carry passengers, unless a seat is provided for them.
5. Never operate mowing equipment without the discharge deflector
securely fastened in place.
!

2 SPECIFICATIONS
6
2 SPECIFICATIONS
2.1 PRODUCT IDENTIFICATION_________________________________________________
67042.............................. Tri-King 1800G Tractor, 3-WD,
18 hp gasoline engine. Without
front lift arms, mowers or battery.
67043.............................. Tri-King 1900D Tractor, 3-WD,
18.5 hp diesel engine. Without
front lift arms, mowers or battery.
Serial Number ................ An identification plate, like the one
shown, listing the serial number, is
attached to the frame of the
tractor and is located to the
operator’s left just behind the front
wheel motor. Always provide the
serial number of the unit when
ordering replacement parts or
requesting service information.
2.2 ENGINE__________________________________________________________________
1800G Gasoline Engine
Make ............................... Briggs &Stratton
Model .............................. Vanguard V-Twin OHV
Horsepower .................... 18 hp (13.5 kW) @3600 rpm
Note: Actual sustained horsepower will likely be lower
than listed in specifications due to operating limitations
and environmental factor
Displacement .................. 34.8 cu. in. (570 cc)
Torque ............................ 26 ft. lbs. (35 Nm) @ 2600 rpm
Fuel:
Type.......................... Unleaded Gasoline
Rating ....................... Min. 85 Octane
Capacity.................... 6.5 U.S. Gal. (24.6 liters)
Governor......................... Flyweight Mechanical
Lubrication:
Capacity.................... 3.5 pints (1.6 liters)
Type.......................... SAE 30W
API Classification ..... SF, SG, SH
Air Filter .......................... Replacable Dual Element.
Alternator ........................ 16 amp
1900D Diesel Engine
Make............................... Kubota
Model.............................. D662-E
Horsepower .................... 18.5 hp (13.9 kW) @3600 rpm
Note: Actual sustained horsepower will likely be lower
than listed in specifications due to operating limitations
and environmental factors
Displacement.................. 40.03 cu. in. (656 cc)
Torque ............................ 26 ft. lbs. (35 Nm) @ 2600 rpm
Fuel:
Type.......................... No. 2 Diesel
Rating ....................... Min. Cetane rating 45
Capacity.................... 6.5 U.S. Gal. (24.6 liters)
Governor......................... Ball Type Governor
Low Idle ................... 1100 RPM
High Idle ................... 3400 RPM
Lubrication:
Capacity.................... 3.4 quarts (3.2 liter) with filter
Type.......................... SAE 20W, SAE 30W
API Classification ..... CD, CE
Air Filter .......................... Dry type with evacuator valve and
service indicator.
Alternator ........................ 40 amp
2.3 CUTTING UNITS: __________________________________________________________
Reel ................................ 3 Reels, 26 in. (660 mm) wide or,
3 Reels, 30 in. (762 mm) wide.
Reel Diameter................. 7 in. (178 mm)
Bearings.......................... Self adjusting tapered roller
bearings
Blade Options ................. 7 blades
Cutting Width:
26 in. Reels............... 72 in. (1828 mm)
30 in. Reels............... 84 in. (2134 mm)
Overall Width:
26 in. Reels............... 78.5 in. (1994 mm)
30 in. Reels............... 90.5 in. (2298 mm)
Cutting Frequency:
7 Blade ..................... 0.151 in./mph (3.8 mm/kph)
Product EEC Sound
Power
Sound Pressure
Level
Operator Ear
Vibration M/S2
Arms Body
67042
67043
99.4 dba
101 dba
83.7 dba
87 dba
1.4
1.4
1.61
<0.08
CHARLOTTE, NC
YEAR OF
PRODUCTION:
MADE IN U.S.A.
®
A Textron Company
67042 1601

SPECIFICATIONS 2
7
2.4 TRACTOR ________________________________________________________________
Tires:
Front ......................... 20 x 10 - 10 tubeless
Rear .........................20 x 10 - 8 tubeless
Pressure:
Front..........................10-12 psi (69-83 kPa)
Rear ..........................8-10 psi (55-69 kPa)
Battery:
Type .......................... 12 Volt Lead/Acid
Group ........................22 NF
Parking Brake .................Mechanical front wheel disk
Hand lever actuated
Speed:
Mow ......................... 0 - 5 mph (8 kph)
Transport ................. 0 - 8.5 mph (13.7 kph)
Reverse .................... 0 - 2.3 mph (3.7 kph)
Hydraulic System:
Capacity.......................... 5.5 U.S. gal. (20.8 liters) System
Fluid Type ....................... GreensCare 68 Biodegradable
Charge Filter................... 10 micron
Return Line Filter ............ 10 micron
Steering ......................... Hydrostatic power steering
2.5 WEIGHTS AND DIMENSIONS ________________________________________________
Dimensions: Inches (mm)
Length ............................................................. 99 (2519)
Height........................................................... 51.5 (1308)
Width - Wheel .............................................. 64.5 (1638)
Weights:...................................................... Lbs. (kg)
67042 1800G (Base Tractor, No Reels) ..... 1266 (574)
67043 1900D (Base Tractor, No Reels)...... 1365 (619)
2.6 ACCESSORIES & SUPPORT LITERATURE _____________________________________
Contact your area Jacobsen Dealer for a complete listing of accessories and attachments.
Accesories
Air Blow Gun ...........................................................JAC5098
Orange Touch-up Paint (12 oz. spray)...................... 554598
2-Post ROPS with Seat Belt ................................... 2500007
Light Kit ....................................................................... 69149
Arm Rest ..................................................................... 66156
Grass Catchers for 26 in. Reel.................................... 69151
Grass Catchers for 30 in. Reel.................................... 69150
600 RPM Reel Kit (1800G Units) ............................ 5003061
600 RPM Reel Kit (1900D Units) ............................ 5003062
Down Pressure Kit .................................................. 1002588
Reels
7 Blade, 26 in. Left Hand Reel .................................... 67114
7 Blade, 26 in. Right Hand Reel.................................. 67115
7 Blade, 26 in. Center Reel......................................... 67116
7 Blade, 30 in. Left Hand Reel .................................... 67123
7 Blade, 30 in. Right Hand Reel.................................. 67124
7 Blade, 30 in. Center Reel......................................... 67125
Rollers
Grooved Front Roller (Steel) for 26 in. Reel ................67731
Grooved Front Roller (Steel) for 30 in. Reel ................67729
Solid Roller for 26 in. Reel.........................................132639
Solid Roller for 30 in. Reel.........................................132640
Grooved Front Roller Scraper for 26 in. Reel ..............69147
Grooved Front Roller Scraper for 30 in. Reel ..............69148
Rear Roller Scraper for 26 in. Reel..............................67909
Rear Roller Scraper for 30 in. Reel..............................67910
Support Literature
Safety & Operation Manual......................................2810631
Parts & Maintenance Manual...................................2810632
Diesel Engine Parts Catalog....................................3004386
Operator Training Video ..........................................2810628
Service & Repair Manual
CAUTION
Use of other than Jacobsen authorized parts and accessories may cause personal injury or damage to the
equipment and will void the warranty
!

3 ADJUSTMENTS
8
3 ADJUSTMENTS
3.1 GENERAL________________________________________________________________
1. Adjustments and maintenance should always be
performed by a qualified technician. If proper
adjustment cannot be made, contact an authorized
Jacobsen Dealer.
2. Replace, do not adjust, worn or damaged
components.
3. Long hair, jewelry or loose fitting clothing may get
tangled in moving parts.
4. Do not change governor settings or overspeed the
engine.
3.2 FAN BELT (DIESEL ENGINES) _______________________________________________
Inspect and adjust new belt after first ten hours of
operation. Adjust every 100 hours thereafter.
1. Adjust alternator pulley so belt (B) deflects 9/32 to
11/32 in. (7 to 9 mm) with a 22 lb. (10 kgf) push at
midspan between pulleys.
2. If tension is incorrect, loosen alternator mounting
bolts (A) and adjust alternator until proper belt
tension is achieved. Tighten hardware (A)
Figure 3A
3.3 PUMP DRIVE BELT ________________________________________________________
Adjust reel pump belt (C) to deflect 1/4 in. (6 mm) with a
force of 5-7 lb. (2-3 kgf) applied at midspan.
1. Loosen hardware (D and E).
2. Move pump/clutch assembly down to increase
tension on belt (C) then tighten hardware (D and E).
3. Torque hardware (D and E) to 27 - 33 ft-lb. (37-45
Nm).
Figure 3B
WARNING
To prevent injury, lower implements to the ground,
disengage all drives, engage parking brake, stop engine
and remove key from ignition switch before making any
adjustments or performing maintenance.
Make sure the tractor is parked on a solid and level
surface. Never work on a tractor that is supported only
by the jack. Always use jack stands.
If only the front or rear of the tractor is raised, place
chocks in front of and behind the wheels that are not
raised.
!
CAUTION
Be careful to prevent entrapment of the hands and
fingers between moving and fixed components of the
machine.
!
A
B
D
D
EE
CC
Diesel Engine Gasoline Engine

ADJUSTMENTS 3
9
3.4 NEUTRAL AND 3WD SWITCHES _____________________________________________
1. Check traction pedal adjustment.
2. Use a volt/ohm meter to determine when switch
opens or closes.
a. Adjust switch (G) so “finger” of actuating arm (F)
is centered over sensing portion of switch.
Switch contacts should be closed with traction
pedal in neutral and open with minimal pedal
travel in forward or reverse direction.
b. Adjust 3WD switch (H) so contacts are open with
traction pedal in neutral, and contacts close with
minimal pedal travel in forward direction.
Figure 3C
3.5 PARKING BRAKE SWITCHES________________________________________________
Loosen screws (K) and adjust both switches so contacts
just close as the brake lever is moved to the engaged
position then tighten screws.
Figure 3D
3.6 LIFT LIMIT SWITCH ________________________________________________________
The lift limit switch must be adjusted so the reels stop
turning before the cutting plane between the reel and
ground reach 15-3/4 in. (400 mm). To adjust, loosen
screw (L) and adjust arm (M).
Figure 3E
G
H
F
K
L
M

3 ADJUSTMENTS
10
3.7 TRACTION PEDAL NEUTRAL _______________________________________________
1. If the tractor “creeps” in either direction when the
engine is running but the traction pedal is not
depressed, adjust spring tension so that the pedal
always returns to neutral when released.
Note: The tractor may “creep” when the hydraulic oil
is cold. Operate the tractor for 15 minutes before
determining if adjustment is required.
2. Use extreme caution when making this adjustment
as the wheels will be off the ground and the engine
will be running.
3. Engage parking brake, stop the engine, open hoods
then lubricate all linkage pivot points.
4. Chock the rear wheel, and place the front of the
tractor on jackstands.
5. Loosen all nuts (N) and adjust rear spring to
position traction arm in neutral.
a. Lock rear nuts and adjust front nuts (N) to
maintain 3/8 in. (9 mm) of extension in spring
(O).
b. Start the engine and check for “creep” then
repeat the process if necessary.
Figure 3F
3.8 TRACTION PEDAL FORWARD STOP _________________________________________
Loosen nuts (P) move the traction pedal to its maximum
forward position. Adjust screw (Q) until the head just
touches the traction pedal arm. Return traction pedal to
neutral and turn screw (Q) out one full turn. Tighten nuts
(P).
Important: Screw (Q) must stop traction pedal before the
internal stops in the hydrostatic transmission are
contacted.
Figure 3G
3.9 LIFT / LOWER PEDAL STOP ________________________________________________
Adjust bolts (Rand S) to stop spool valve from hitting the
internal stops, while maintaining the full stroke of the
spool.
Figure 3H
O
NN
Front
P
P
Q
S
R

ADJUSTMENTS 3
11
3.10 PARKING BRAKE__________________________________________________________
1. Check linkage cables and pivots to ensure they are
operating smoothly.
2. Park the tractor on a 30% slope (16.7°) near the
bottom of the hill, with the front of the tractor facing
downhill. Engage the parking brake and stop the
engine.
a. The tractor should stay on the hill without
creeping.
b. If the brakes do not hold, start the engine,
disengage the brake and drive to the bottom of
the hill.
3. With parking brake disengaged, turn adjusting knob
in a clockwise direction, applying and releasing
brake every quarter turn until a definite “snap over
center” action is achieved.
4. Repeat the test on the hill if required.
Note: Over adjustment causes hard lever action, but
does not increase brake efficiency.
3.11 REAR LIFT ARM ___________________________________________________________
1. Rear lift arm position is properly adjusted when the
rear mower bumpers are putting slight pressure
against the underside of the foot rests.
2. Disconnect lift chain (T) from crank and adjust ball
joint (U) as required.
Figure 3I
3.12 DOWN PRESSURE_________________________________________________________
1. Place mowers in the “fixed” mode (Section 3.18) and
lower the mowers onto a scale, capable of weighing
250 lb. (113 kg). The rear roller of the mower must
rest on the scale.
2. To adjust pressure on rear mower loosen nuts (V)
and adjust to obtain the desired pressure.
3. To adjust pressure on front mowers, loosen nut (W)
and adjust bolt (X). Minimum thread engagement
should be 1/2 in. (13 mm).
4. To maintain a consistent height of cut, the down
pressure should be adjusted evenly on all three
mowers.
5. Jacobsen, recommends the mower weight for
“Floating” mode at 60 lb. (27 kg), and for “Fixed”
mode at 90 lb. (41 kg).
Figure 3J
Figure 3K
CAUTION
DO NOT disengage the brakes with the engine off.
!
T
U
V
X
W

3 ADJUSTMENTS
12
3.13 REEL TO BEDKNIFE _______________________________________________________
(Pre-adjustment Check)
1. Check the reel bearings for end play or radial play. If
there is any abnormal movement of the reel, up and
down or side to side, adjust or replace components as
needed.
2. Inspect the reel blades and bedknife to insure good
sharp edges without bends or nicks.
a. The cutting edges of the reel blades and bedknife
must be sharp, free of burrs and show no signs of
rounding off.
b. The bedknife and bedknife backing must be
securely tightened. The bedknife must be straight
and sharp.
c. A flat surface of 5/32 in. (4 mm) minimum must be
maintained on the front face of the bedknife. Use a
standard flat file to dress the bedknife.
3. If wear or damage is beyond the point where the reel
or bedknife can be corrected by the lapping process,
they must be reground.
4. Proper reel-to-bedknife adjustment is critical. A gap of
0.001 to 0.003” (0.025 to 0.076 mm) must be
maintained across the entire length of the reel and
bedknife.
5. The reel must be parallel to the bedknife. An
improperly adjusted reel will lose its sharp edges
prematurely and may result in serious damage to the
reel and bedknife.
6. Grass conditions will also affect the adjustment.
a. Dry, sparse conditions will require a wider gap to
prevent heat buildup and damage to the reel and
bedknife.
b. High quality grass with a good moisture content
requires a closer gap (near zero).
Figure 3L
3.14 REEL TO BEDKNIFE ADJUSTMENT __________________________________________
1. Read Section 3.13 before making the adjustment.
2. Start adjustment at the leading edge of the reel,
followed by the trailing end. The leading end of the
blade is the end that passes over the bedknife first
during normal rotation.
3. Loosen nut (C) 1/4 turn on both ends of the cutting
unit.
a. Turn adjuster (A) in 1/16 to 1/8 turn increments.
b. Slide a feeler gauge or shim stock.001 in. (.025
mm) between the reel blade and the bedknife.
Do not turn reel.
c. Adjust the trailing end of the reel in the same
manner then recheck the adjustment at the
leading end.
d. Tighten all hardware and recheck the adjustment
e. When properly adjusted, the reel will spin freely
and you should be able to cut a piece of
newspaper, along the full length of the reel, when
the paper is held at 90°.
Figure 3N
CAUTION
To prevent personal injury and damage to the cutting
edges, handle the reel with extreme care.
!
5 -6
93
5/32 in.
°
°
Leading
Edge of Reel
Normal
Rotation
A
B
C
E
D
F
G

ADJUSTMENTS 3
13
3.15 CUTTING MODES__________________________________________________________
1. The mower may be operated in the fixed mode or
the floating mode.
2. Fixed mode is generally used for cutting heights
greater than 1 in. (25 mm) and the mower does not
require a front roller unless the terrain is rough and
uneven.
If a front roller is required, the roller should be raised
1/4 in. (6 mm) higher than the rear roller and used for
anti-scalp purposes only.
3. Floating mode is generally used for cutting heights
less than one inch (25 mm) and a front roller is
required.
If a 2-1/2 in. (63 mm) solid front roller is used, the
cutting height will range from 3/8 to 2-1/8 in. (9 to
54 mm).
If a 3 in. (76 mm) grooved front roller is used, the
cutting height will range from 3/8 to 2-1/4 in. (9 to
57 mm).
4. To convert the mower from fixed to floating mode,
remove hardware (H) from each side of the three
mower frames.
Install a front roller and store hardware (H) for future
conversion to fixed mode.
5. To convert the mower from floating to fixed mode,
assemble hardware (H) as shown and remove the
front roller or raise the roller.
Figure 3O
3.16 CUTTING HEIGHT ADJUSTMENT_____________________________________________
1. Raise and lock the lift arms in transport mode.
2. For easier access to the height adjusters on the
motor end of the front reels, Jacobsen recommends
raising the front end of the tractor just a few inches
off the ground then, being careful not to damage the
hydraulic hoses, tilt the front mowers 90 degrees
and tether the mowers together.
3. On the rear mower (center) remove the pin and
collar on the shaft and slide the mower backwards.
4. Always make the reel-to bedknife adjustment
(Sections 3.13 and 3.14) before making the cutting
height adjustment.
5. Select fixed or floating mode and convert the
mower accordingly.
6. Loosen skid mounting hardware (D- Figure 3N)
then adjust the cutting height. (A special tool is
provided with the mowers. A 5/8 in. socket and
ratchet are required).
Figure 3P
H
HH
Tether

3 ADJUSTMENTS
14
3.17 REMOVING THE CUTTING UNIT _____________________________________________
1. To prevent contamination of the hydraulic system, as
well as loss of oil, do not disconnect the hoses from
the motor.
2. Raise and lock the lift arms in transport mode
(Section 3.4) and disconnect the down pressure
springs.
3. Remove transport pin then lower the lift arms to the
ground.
4. Remove hardware securing motor to drive housing
and carefully pull the motor away.
5. Place motor in a clean plastic bag and cover the
opening in the gear box.
6. Remove pin and collar from center (rear) lift arm
and pull the center cutting unit away from the
tractor.
7. Remove the hardware securing the front lift arms to
the cutting units, and slide the mowers out of the
way.
3.18 CUTTING HEIGHT - FIXED MODE ____________________________________________
Follow the procedures outlined in Section 3.16.
1. Reposition the rear roller adjuster.
a. For cutting heights from 3/8 to 1-3/4 in. (9 to
44 mm) use holes (M) on the mower frame and
two holes (shown in black) of the height adjuster
(F) as shown.
b. For cutting heights greater than 1-3/4 inches
(44 mm) disassemble adjuster (F) and turn the
mounting bracket upside down; then use holes
(N) of the frame and the two holes (shown in
black) of the adjuster (F).
2. Remove the tether, and lower the cutting units to
the ground.
3. Place spacers of the desired height (J) under each
end of the reel, adjacent to the front edge of the
bedknife.
4. Loosen nut (G) and lower rear roller to the ground.
Tighten nut (E) against the adjuster then recheck
the setting on both side of the reel. Readjust if
necessary.
5. Assemble the front roller adjuster (B) (If a roller is
required) to holes number 2 and 4 only of the
mower frame. Do not use holes number 1 and 3.
Set roller to 1/4 in. (6 mm) above rear roller.
Figure 3Q
Figure 3R
CAUTION
Disconnect lift springs before removing mowers.
!
1
2
3
4
5
6
7
8
N
M
N
M
U
T
S
R
B
E
F
G
G
J
F
E
A
B

ADJUSTMENTS 3
15
3.19 CUTTING HEIGHT - FLOATING MODE _________________________________________
Follow the procedures outlined in Section 3.16.
1. Assemble the front roller adjuster (B) to holes num-
ber 2 and 4 only of the mower frame. Do not use hole
numbers 1 and 3. Refer to the chart below for correct
hole of front roller adjuster to use.
2. Reposition the rear roller adjusters (F).
a. For cutting heights from 3/8 to 1-3/4 in. (9 to
44 mm) use holes (M) on the mower frame and
two holes (shown in black) of adjuster (F) as
shown.
b. For cutting heights greater than 1-3/4 in.
(44 mm), disassemble adjuster (F) and turn the
mounting bracket upside down; then use holes
(N) of the frame and the two holes (shown in
black) of adjuster (F).
3. Loosen nut (L) and adjust screw (K) to obtain
desired cutting height (X) then lock nut (L) against
gauge (P).
4. Place one end of the gauge under the front roller at
either end of the reel, and slide the head of screw
(K) over the bedknife.
a. Adjust nut (G) to lower the rear roller to the
gauge, then tighten nut (E) against the adjuster.
b. Move the gauge to the other end of the reel and
repeat Steps 4a and 4b.
Figure 3S
Figure 3T
Range of Cut
Grooved Roller
Inches Millimeters
Solid Roller
Inches Millimeters
Front Rear
3/8 - 3/4 10 - 19 3/8 - 5/8 10 - 16 R M
3/4 - 1-1/4 19 - 32 5/8 - 1-1/8 16 - 29 S M
1-1/4 - 1-3/4 32 - 44 1-1/8 - 1-5/8 29 - 41 T M
1-3/4 - 2-1/4 44 - 57 1-5/8 - 2-1/8 41 - 54 U N
1
2
3
4
5
6
7
8
N
M
N
M
U
T
S
R
B
E
F
G
Front Roller
P
Rear Roller
X-Cutting Height
KL

3 ADJUSTMENTS
16
3.20 TORQUE SPECIFICATION __________________________________________________
Jacobsen uses Grade 5 Plated bolts as standard, unless otherwise noted. For tightening plated bolts, use the value
given for lubricated.
3.21 SPECIFIC TORQUE ________________________________________________________
1. Tie rod ball joints: (2) 30 - 35 ft. lb. (41 - 47 Nm).
2. Engine drain plugs: 22 ft. lb. (30 Nm).
3. Steering ball joints: 50 - 55 ft. lb. (68 - 75 Nm).
4. Steering wheel nut 30-40 ft-lb (41 - 51 Nm)
5. Wheel hardware:65 - 85 ft. lb. (88 - 116 Nm).
CAUTION
All torque values included in these charts are approximate and are for reference only. Use of these torque values is
at your sole risk. Jacobsen is not responsible for any loss, claim, or damage arising from the use of these charts.
Extreme caution should always be used when using any torque value.
AMERICAN NATIONAL STANDARD FASTENERS
SIZE UNITS GRADE 5 GRADE 8 SIZE UNITS GRADE 5 GRADE 8
Lubricated Dry Lubricated Dry Lubri-
cated
Dry Lubri-
cated
Dry
#6-32 in-lb (Nm) – 20 (2.3) – – 7/16-14 ft-lb (Nm) 37 (50.1) 50 (67.8) 53 (71.8) 70 (94.9)
#8-32 in-lb (Nm) – 24 (2.7) – 30 (3.4) 7/16-20 ft-lb (Nm) 42 (56.9) 55 (74.6) 59 (80.0) 78 (105)
#10-24 in-lb (Nm) – 35 (4.0) – 45 (5.1) 1/2-13 ft-lb (Nm) 57 (77.2) 75 (101) 80 (108) 107 (145)
#10-32 in-lb (Nm) – 40 (4.5) – 50 (5.7) 1/2-20 ft-lb (Nm) 64 (86.7) 85 (115) 90 (122) 120 (162)
#12-24 in-lb (Nm) – 50 (5.7) – 65 (7.3) 9/16-12 ft-lb (Nm) 82 (111) 109 (148) 115 (156) 154 (209)
1/4-20 in-lb (Nm) 75 (8.4) 100 (11.3) 107 (12.1) 143 (16.1) 9/16-18 ft-lb (Nm) 92 (124) 122 (165) 129 (174) 172 (233)
1/4-28 in-lb (Nm) 85 (9.6) 115 (13.0) 120 (13.5) 163 (18.4) 5/8-11 ft-lb (Nm) 113 (153) 151 (204) 159 (215) 211 (286)
5/16-18 in-lb (Nm) 157 (17.7) 210 (23.7) 220 (24.8) 305 (34.4) 5/8-18 ft-lb (Nm) 128 (173) 170 (230) 180 (244) 240 (325)
5/16-24 in-lb (Nm) 173 (19.5) 230 (26.0) 245 (27.6) 325 (36.7) 3/4-10 ft-lb (Nm) 200 (271) 266 (360) 282 (382) 376 (509)
3/8-16 ft-lb (Nm) 23 (31.1) 31 (42.0) 32 (43.3) 44 (59.6) 3/4-16 ft-lb (Nm) 223 (302) 298 404 315 (427) 420 (569)
3/8-24 ft-lb (Nm) 26 (35.2) 35 (47.4) 37 (50.1) 50 (67.8) 7/8-14 ft-lb (Nm) 355 (481) 473 (641) 500 (678) 668 (905)
METRIC FASTENERS
SIZE UNITS
Non Critical
Fasteners
into
Aluminum
Lubricated Dry Lubricated Dry Lubricated Dry Lubricated Dry
M4 Nm(in-lb)––––––3.83(34)5.11(45)2.0(18)
M5 Nm (in-lb) 1.80 (16) 2.40 (21) 4.63 (41) 6.18 (54) 6.63 (59) 8.84 (78) 7.75 (68) 10.3 (910 4.0 (35)
M6 Nm (in-lb) 3.05 (27) 4.07 (36) 7.87 (69) 10.5 (93) 11.3 (102) 15.0 (133) 13.2 (117) 17.6 (156) 6.8 (60)
M8 Nm (in-lb) 7.41 (65) 9.98 (88) 19.1 (69) 25.5 (226) 27.3 (241) 36.5 (323) 32.0 (283) 42.6 (377) 17.0 (150)
M10 Nm (ft-lb) 14.7 (11) 19.6 (14) 37.8 (29) 50.5 (37) 54.1 (40) 72.2 (53) 63.3 (46) 84.4 (62) 33.9 (25)
M12 Nm (ft-lb) 25.6 (19) 34.1 (25) 66.0 (48) 88.0 (65) 94.5 (70) 125 (92) 110 (81) 147 (108) 61.0 (45)
M14 Nm (ft-lb) 40.8 (30) 54.3 (40) 105 (77) 140 (103) 150 (110) 200 (147) 175 (129) 234 (172) 94.9 (70)
4.6 8.8 10.9 12.9

MAINTENANCE 4
17
4 MAINTENANCE
4.1 GENERAL ________________________________________________________________
1. Adjustment and maintenance should always be per-
formed by a qualified technician. If proper adjustments
cannot be made, contact an Authorized Jacobsen
Dealer.
2. Inspect the equipment on a regular basis, establish a
maintenance schedule and keep detailed records.
a. Keep the equipment clean.
b. Keep all moving parts properly adjusted and lubri-
cated.
c. Replace worn or damaged parts before operating
the machine.
d. Keep all fluids at their proper levels.
e. Keep shields in place and all hardware securely
fastened.
f. Keep tires properly inflated.
3. Long hair, jewelry or loose fitting clothing may get
tangled in moving parts.
4. Use the illustrations in the Parts Catalog as reference
for the disassembly and reassembly of components.
5. Recycle or dispose of all hazardous materials
(batteries, fuel, lubricants, anti-freeze, etc.) according
to local, state or federal regulations.
4.2 ENGINE _________________________________________________________________
IMPORTANT: A separate Engine Manual, prepared by
the engine manufacturer, is supplied with this tractor.
Read the engine manual carefully until you are familiar
with the operation and maintenance of the engine.
Proper attention to the engine manufacturer’s
directions will assure maximum service life of the
engine. To order replacement engine manuals contact
the engine manufacturer.
The proper break-in of a new engine can make a
considerable difference to the performance and life of the
engine.
Note: The tractor is designed to operate and cut most
efficiently at the preset governor setting. Do not change the
engine governor settings or overspeed the engine.
During the break-in period, Jacobsen recommends the
following:
Diesel Engine:
1. During the first 50 hours of operation, a new engine
should be allowed to reach an operating temperature of
at least 140°F (60°C) prior to operation at full load.
2. Check the engine oil level twice daily during the first 50
hours of operation. Higher than normal oil consumption
is not uncommon during the initial break-in period.
3. Change engine oil and oil filter element after first 50
hours of operation.
4. Check and adjust fan and alternator belts.
5. Refer to Section 6.3 and Engine Manual for specific
maintenance intervals.
If the injection pump, injectors or the fuel system require
service, contact an authorized Jacobsen Dealer.
Gasoline Engine:
1. Drive modestly for the first 25 hours at reduced engine
speed.
2. Avoid full throttle starts and rapid acceleration.
3. Allow the engine to reach operating temperature before
operating at full load.
4. Change the oil and filter after the first 8 hours of
operation.
5. Refer to Section 6.3 and Engine Manual for specific
maintenance intervals.
WARNING
Before you clean, adjust, or repair this equipment,
disengage all drives, lower implements to the ground,
engage parking brake, stop engine and remove key from
ignition switch to prevent injuries
Make sure the tractor is parked on a solid and level
surface. Never work on a tractor that is supported only by
the jack. Always use jack stands.
!

4 MAINTENANCE
18
4.3 ENGINE OIL ______________________________________________________________
Check the engine oil at the start of each day, before starting
the engine. If the oil level is low, remove oil filler cap and add
oil as required.
Diesel Engine:
Perform initial oil change after first 50 hours of operation and
every 100 hours thereafter. See Engine Manual.
Use only engine oils with API classification CD/CE.
Gas Engine:
Perform initial oil change after the first 8 hours of operation.
Change oil every 50 hours thereafter.
See the engine manufacturer’s Owners’s Manual for
detailed service information.
After adding or changing oil, start and run engine at idle with
all drives disengaged for 30 seconds. Shut engine off. Wait
30 seconds and check oil level. Add oil to bring up to FULL
mark on dipstick.
Use only engine oils with API classification SF, SG,SH.
Figure 4A
Figure 4B
4.4 GAS ENGINE AIR FILTER ___________________________________________________
1. Remove and service the foam pre-cleaner (A) every 25
hours. Replace if dirty or damaged.
To service pre-cleaner, wash in a liquid detergent and
water. Squeeze dry in a clean cloth. Saturate in clean
engine oil and squeeze out excess oil in a clean,
absorbent cloth.
2. Replace the air cleaner cartridge (B) every 100 hours,
more often when operating in dusty conditions.
Note: Do not use petroleum solvents such as kerosene
to clean cartridge. Do not use pressurized air to clean
cartridge.
See the engine manufacturer’s Owners’s Manual for
detailed service information.
Figure 4C
Above 77°F (25°C) SAE 30W or SAE10W30/10W40
32 to 77°F (0 to 25°C) SAE 20W or SAE 10W30/10W40
Below 32° (0°C) SAE10W or SAE 10W30/10W40
Above 40° F (5° C) SAE 30W
0 to 40° F (-18 to 5° C) SAE 5W30 or SAE 10W30
Safe Operating Range
⎧ ⎨ ⎪ ⎪ ⎪ ⎪ ⎩
Diesel Engine Dipstick
ADD
FULL
Gas Engine Dipstick
A
B

MAINTENANCE 4
19
4.5 DIESEL AIR FILTER ________________________________________________________
Check the service indicator daily. If red band appears in the
window (C) replace the element.
Do not remove the element for inspection or cleaning.
Unnecessary removal of the filter increases the risk of
injecting dust and other impurities into the engine.
When service is required, first clean the outside of the filter
housing; then remove the old element as gently as possible
and discard.
1. Carefully clean the inside of the filter housing without
allowing dust into the air intake.
2. Inspect the new element. Do not use a damaged
element and never use an incorrect element.
3. Assemble the new element and make sure it seats
properly. Reset the indicator by depressing button (D).
4. Reassemble cap making sure it seals completely
around the filter housing. Dust evacuator (E) must be
facing down.
5. Check all hoses and air ducts. Tighten hose clamps.
Figure 4D
4.6 FUEL ____________________________________________________________________
Handle fuel with care - it is highly flammable. Use an
approved container, the spout must fit inside the fuel filler
neck. Avoid using cans and funnels to transfer fuel.
• Fill the fuel tank to within 1 in. (25 mm) of the bottom of
the filler neck.
• Store fuel according to local, state or federal ordinances
and recommendations from your fuel supplier.
• Never overfill or allow the tank to become empty.
• Check fuel lines and clamps every 50 hours. Replace fuel
lines and clamps at the first sign of damage.
Diesel Engine:
• Use clean, fresh, #2 Diesel fuel. Minimum Cetane rating
45. Refer to Engine Manual for additional information.
Gas Engine:
• Use clean, fresh, regular grade, unleaded gasoline
minimum 85 Octane.
• Do not use hi-test gasoline or an oil-gasoline mixture.
When using blended fuel, do not use a blend with more
than 10% ethanol. Under no circumstances should you
use a blend with methanol.
4.7 FUEL SYSTEM ____________________________________________________________
Refer to Section 6.3 for specific maintenance intervals.
Before replacing any filter, thoroughly clean the filter
housing and the area around the filter. Dirt must not be
allowed to enter into fuel system.
For diesel engines, bleed the fuel system after the fuel filter
and lines have been removed, or the fuel tank has become
empty. See Engine Manual.
C
D
E
WARNING
Never remove the fuel cap from the fuel tank, or add fuel,
when the engine is running or while the engine is hot.
Do not smoke when handling fuel. Never fill or drain the
fuel tank indoors.
Do not spill fuel and clean spilled fuel immediately.
Never handle or store fuel containers near an open flame
or any device that may create sparks and ignite the fuel
or fuel vapors.
Be sure to reinstall and tighten fuel cap securely.
!

4 MAINTENANCE
20
4.8 BATTERY ________________________________________________________________
Make absolutely certain the ignition switch is “Off” and the
key has been removed before servicing the battery.
Tighten cables securely to battery terminals and apply a
light coat of silicone dielectric grease to terminals and cable
ends to prevent corrosion. Keep vent caps and terminal
covers in place
Check the electrolyte level every 100 hours. Keep the cable
ends, battery and battery posts clean.
Verify battery polarity before connecting or disconnecting
the battery cables.
1. When installing the battery, always assemble the RED,
positive (+) battery cable first and the ground, BLACK,
negative (-) cable last.
2. When removing the battery, always remove the
ground, BLACK, negative (-) cable first and the RED,
positive (+) cable last.
3. Make sure battery is properly installed and secured to
the battery tray.
4.9 JUMP STARTING __________________________________________________________
Before attempting to “jump start” the tractor, check the
condition of the discharged battery. Section 4.8
When connecting jumper cables:
1. Stop the engine on the vehicle with a good battery.
2. Connect RED jumper cable to the positive (+) terminal
on the good battery and to the positive (+) terminal on
the “discharged” battery.
3. Connect the BLACK jumper cable from the negative
(-) terminal on the good battery to the frame of the
tractor with the discharged battery.
After cables have been connected, start the engine on the
vehicle with the good battery then start the tractor.
4.10 CHARGING BATTERY _____________________________________________________
1. Refer to Section 4.8. Read the Battery and Charger’s
manual for specific instructions.
2. Whenever possible, remove the battery from the tractor
before charging. If battery is not sealed, check that the
electrolyte covers the plates in all the cells.
3. Make sure the charger is “Off”. Then connect the
charger to the battery terminals as specified in the
charger’s manual.
4. Always turn the charger “Off” before disconnecting
charger from the battery terminals.
CAUTION
Always use insulated tools, wear protective glasses or
goggles and protective clothing when working with
batteries. You must read and obey all battery
manufaturer’s instructions.
!
WARNING
Battery posts, terminals and related accessories
contain lead and lead compounds, chemicals known
to the State of California to cause cancer and
reproductive harm. Wash your hands after
handling.
!
WARNING
Batteries generate explosive hydrogen gas. To reduce
the chance of an explosion, avoid creating sparks near
battery. Always connect the negative jumper cable to the
frame of the tractor with the discharged battery, away
from the battery.
!
WARNING
Charge battery in a well ventilated area. Batteries
generate explosive gases. To prevent an explosion, keep
any device that may create sparks or flames away from
the battery.
To prevent injury, stand away from battery when the
charger is turned on. A damaged battery could explode.
!