PDF Operation & Maintenance Manual Bobcat 450 Loader - 2 MB
The official Operation & Maintenance Manual for the Bobcat 450 Loader is an essential resource for owners and operators.
It details the correct operating procedures, safety precautions, and routine maintenance schedules.
Following the guidelines within this manual will help you get the most out of your machine while ensuring its longevity and safe operation.
This is a must-read document for anyone working with a Bobcat 450.
PDF Viewer
Viewer loads when you scroll here
SHARE THIS MANUAL
Download the PDF Manual
PDF viewer loading area
Text Preview from This Manual
The text below was extracted from the visible preview pages to help you confirm the manual contents before download.
--- Page 1 ---
Operation
&
Maintenance
Dealer Copy -- Not for Resale
Manual
Doosan purchased Bobcat Company from Ingersoll-Rand Company in
2007. Any reference to Ingersoll-Rand Company or use of trademarks,
service marks, logos, or other proprietary identifying marks belonging
to Ingersoll-Rand Company in this manual is historical or nominative
in nature, and is not meant to suggest a current affiliation between
Ingersoll-Rand Company and Bobcat Company or the products of
either.
EQUIPPED WITH
BOBCAT INTERLOCK
CONTROL SYSTEM (BICSTM) 6724207 (9-98) Revised (5-12) Printed in U.S.A. © Melroe Company 1998
1 of 92
--- Page 3 ---
OPTIONS AND ACCESSORIES
Model 450 Bobcat loaders are equipped with the following standard items:
Spark Arrestor Muffler
Lift Arm Support Device
Operator Cab (with ROPS & FOPS Approval)
Bobcat Interlock Control System (BICS™)
Hourmeter, Fuel Gauge (on tank)
Seat Belt
Seat Bar
Parking Brake
Black Cushion Seat
5.70–12, 4 Ply Rating Tires (Machine Width – 36 inches)
Below is a list of some equipment available as a Factory Installed Option
or as a Field Installed Accessory from your Bobcat
loader dealer. See your Bobcat dealer for other available accessories and attachments.
Tires Hydraulics
23 x 8.5 – 12, 4 Ply Rating Flotation Tires Front Auxiliary Hydraulics . . . . . . . . . . . Opt. & FA
(Machine Width – 44 inches) . . . . . . . Opt. & FA
23 x 8.5 – 12, 6 Ply Rating Bobcat Heavy Duty
(Machine Width – 44 inches) . . . . . . . Opt. & FA Other
Bob–Tach . . . . . . . . . . . . . . . . . . . . . . . . . Opt. & FA
Operator Cab Single Point Lift . . . . . . . . . . . . . . . . . . . . FA
Locking Fuel Cap . . . . . . . . . . . . . . . . . . . FA
Sound Cab (Reduces noise at
Operator’s Ear) . . . . . . . . . . . . . . . . . . Opt.
Operating Lights (Front & Rear) . . . . . . Opt. & FA
Back–up Alarm . . . . . . . . . . . . . . . . . . . . . Opt. & FA
Top Window . . . . . . . . . . . . . . . . . . . . . . . FA
Rear Window . . . . . . . . . . . . . . . . . . . . . . FA
Side Windows . . . . . . . . . . . . . . . . . . . . . FA
Vinyl Cab Enclosure . . . . . . . . . . . . . . . . FA
Fire Extinguisher . . . . . . . . . . . . . . . . . . . FA
Strobe Light . . . . . . . . . . . . . . . . . . . . . . . FA
3 inch Seat Belt . . . . . . . . . . . . . . . . . . . FA
Suspension Seat . . . . . . . . . . . . . . . . . . . FA
Special Applications Kit* . . . . . . . . . . . . . FA
*Includes 1/2 inch Lexan Door,
1/4 inch Lexan Top and Rear Windows
Opt. = Factory Installed Option
FA = Field Accessory
Specifications subject to
change without notice
450 Bobcat Loader
vii Operation & Maintenance Manual
--- Page 4 ---
OPERATING INSTRUCTIONS
ATTACHMENTS & BUCKETS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
...
Installation And Removal (With Bob–Tach) . . . . . . . . . . . . . . . . . . . . . . . . 18
..
Installation And Removal (Without Bob–Tach) . . . . . . . . . . . . . . . . . . . . . . 17..
BOBCAT INTERLOCK CONTROL SYSTEM (BICS™) . . . . . . . . . . . . . . . . . 4.
Lift Arm By–Pass Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4. . .
Seat Sensor Override (If Equipped) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 ...
Traction Lock Override . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5. . . .
DAILY INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
....
OPERATING
ENGINE SPEED CONTROL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3. . . INSTRUCTIONS
ENGINE CHOKE CONTROL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3. . .
GETTING READY FOR OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
..
HYDRAULIC CONTROLS
Auxiliary Hydraulics (Option or Field Accessory) . . . . . . . . . . . . . . . . . . . . . .9.
Auxiliary Hydraulics Continuos Operation . . . . . . . . . . . . . . . . . . . . . . . . . 10 ..
Auxiliary Hydraulics Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 ...
Quick Couplers (Flush Face) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9. . .
Foot Pedals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.....
Lift Arm Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8. . . .
Lift Arm Float Position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 ....
Tilt Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8. . . .
INSTRUMENT PANEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3. . . .
LIFTING THE LOADER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
....
OPERATING PROCEDURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19 ...
Backfilling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
.....
Emptying The Bucket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 ....
Digging Into The Ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21 ...
Filling The Bucket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20 ....
Leveling The Ground (Using Lift Arms in Float Position) . . . . . . . . . . . . . . 22 .
PARKING BRAKE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5. . . .
PARKING THE BOBCAT LOADER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
...
SEAT BAR RESTRAINT SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7. . .
STARTING THE ENGINE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14 ...
Cold Temperature Starting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16 ...
Normal Starting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
....
Warming The Hydraulic/Hydrostatic System . . . . . . . . . . . . . . . . . . . . . . . 16 ..
STEERING LEVERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6. . . .
STOPPING THE BOBCAT LOADER . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6,
. . 23
STOPPING THE ENGINE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
...
TOWING THE LOADER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
....
TRANSPORTING THE BOBCAT LOADER . . . . . . . . . . . . . . . . . . . . . . . . . 23
..
450 Bobcat Loader
–1– Operation & Maintenance Manual
--- Page 5 ---
DAILY INSPECTION
A
The loader must be in good operating condition [A].
Check the following items before starting each day:
• Engine Oil
• Hydraulic/Hydrostatic Fluid
• Air Cleaner Condition Indicator
• Engine Cooling System
• Operator Cab, Seat Belt, Seat Bar & Pedal Interlocks
• Lift Arms & Cylinder Pivot Pins
• Tires & Tire Pressure
• Any Loose or Broken Parts
• Check Fuel Level
• Safety Tread & Safety Signs
• Bobcat Interlock Control System (BICS™) B–06583
Follow the maintenance requirements on the Service
Schedule Decal, located inside the rear door [B].
NOTE: Fluids such as engine oil, hydraulic fluid,
coolants, etc. must be disposed of in an envi-
ronmentally safe manner. Some regulations
require that certain spills and leaks on the Instructions are necessary before operating or
ground must be cleaned in a specific manner. servicing machine. Read Operation &
See local, state and federal regulations for Maintenance Manual, Handbook and signs
correct disposal. (decals) on machine. Follow warnings and
instructions in the manuals when making
repairs, adjustments or servicing. Check for
correct function after adjustments, repairs or
service. Failure to follow instructions can
cause injury or death [A].
W–2003–0797
B
6708212
450 Bobcat Loader
–11– Operation & Maintenance Manual
--- Page 6 ---
OPERATING PROCEDURES (Cont’d)
Digging Into The Ground
A
Put the lift arms all the way down. Push the top of the tilt
pedal until the cutting edge of the bucket is on the
ground.
Drive forward slowly and continue to tilt the bucket down
until it enters the ground [A]. N–15146
B–06720
Push the bottom of the tilt pedal a small amount to B
increase traction and keep an even digging depth [B].
Continue to drive forward until the bucket is full. Whenthe
ground is hard, raise and lower the cutting edge of the
bucket with the tilt pedal while driving forward slowly.
N–15146
B–06721
Push the bottom of the tilt pedal to tilt
the bucket backward
as far as it will go when the bucket is full [C]. C
N–15146
B–06717
450 Bobcat Loader
–21– Operation & Maintenance Manual
--- Page 7 ---
OPERATOR CAB (Cont’d)
Lowering The Operator Cab
A
1
Hold the operator cab. Release the locking mechanism by
pushing the lever (Item 1) [A] inward from the locked
position (Item 2) [A] and turning the lever until it stays in 2
the unlocked position [B].
The cab must be held to prevent falling while P–09823
hand is in access hole.
W–2205–0695
B
REMOVE YOUR HAND BEFORE LOWERING THE
OPERATOR CAB
Stand on the ground and pull down on the operator cab.
Avoid slippery surfaces when lowering the cab.
NOTE: Guide the operator cab over the fastening
bolts to prevent thread damage.
P–09825
Install the cab washers and nuts. Tighten the nuts (Item
1) [C] (both sides) to 40–50 ft.–lbs. (54–68 Nm) torque. C
1
P–09771
450 Bobcat Loader
–31– Operation & Maintenance Manual
--- Page 8 ---
ELECTRICAL SYSTEM (Cont’d)
Using An Extra Battery (Jump Starting) (Cont’d)
A
The key switch must be in the OFF POSITION.
The extra battery must be thesame voltage as the loader
battery.
Connect the end of the first jumper cable to the positive
(+) terminal of the booster battery. Connect the other end
of the same cable to the positive terminal (+) of the loader
battery [A].
Connect the end of the second jumper cable to the
negative (–) terminal of the booster battery. Connect the
other end of the second cable to the engine ground cable P–04396
on the engine [A].
Keep the cables away from moving parts.
Start the engine.
After engine has started, remove the cable connected to
the engine ground cable first.
Batteries contain acid which burns eyes and
Remove the cable connected to the positive (+) terminal skin on contact. Wear goggles, protective
of the loader battery. clothing and rubber gloves to keep acid off
body.
In case of acid contact, wash immediately with
water. In case of eye contact get prompt medical
attention and wash eye with clean, cool water
for at least 15 minutes.
Damage to alternator can occur if: If electrolyte is taken internally drink large
quantities of water or milk! DO NOT induce
• Engine is operated with battery cables vomiting. Get prompt medical attention.
disconnected. W–2065–1296
• Battery cables are connected when using a
fast charger or when welding on the loader
(Remove both cables from the battery).
• Extra battery cables (booster cables) are
connected wrong.
I–2023–1285
Fuse Location
The fuses are located on the inside of the left upright.
450 Bobcat Loader
–41– Operation & Maintenance Manual
--- Page 9 ---
SYSTEMS ANALYSIS
BOBCAT INTERLOCK CONTROL SYSTEM (BICS™)
TROUBLESHOOTING CHART . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
...
TROUBLESHOOTING THE ENGINE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53
..
TROUBLESHOOTING THE HYDRAULIC SYSTEM . . . . . . . . . . . . . . . . . .54
.
TROUBLESHOOTING THE HYDROSTATIC SYSTEM . . . . . . . . . . . . . . . . 55
.
SYSTEMS
ANALYSIS
450 Bobcat Loader
–51– Operation & Maintenance Manual
--- Page 10 ---
ADVERTENCIA (SPANISH) ATTENTION (FRENCH)
EVITE HERIDAS O LA MUERTE EVITER LES BLESSURES OU LA MORT
NO USE NUNCA EL CARGADOR SIN LEER LAS NE JAMAIS SE SER VIR DE LA CHARGEUSE SANS
INSTRUCCIONES. INSTRUCTIONS.
LEA EL MANUAL DEL OPERA TIO, EL MANUAL DE LIRE LE MANUEL DE L’OPERATEUR EL D’ENTRETIEN
SERVICIO Y LA GIA DEL OPERARIO. AINSI QUE LE GUIDE D’UTILISATION.
NO VIAJE O DE LA VUEL TA CON LOS BRAZOS DE NE PAS SE DEPLACER NI VIRER AVEC LE BRAS
ELEVACION ARRIBA. RELEVES.
CARGUE, DESCARGUE Y DE LA VUELTA ESTANDO EN CHARGER, DECHARGER ET VIRER SUR UN SOL PLA
T
UN SITIO PLANO Y NIVELADO. ET HORIZONTAL.
NO EXCEDA LA CAP ACIDAD NOMINAL DE NE PAS DEPASSER LE CAP ACITE NOMINALE
FUNCIONAMIENTO (VEA EL A VISO EN EL (CONSULTER L’AUTOCOLLANT APPOSE SUR LA
CARGADOR). CARGEUSE).
USE LA BARRA DEL ASIENTO. UTILISER L’ARCEAU DE SECURITE.
ASEGURESE BIEN EL CINTURON DE SEGURIDAD. ATTACHER SOIGNEUSEMENT LA CEINTURE DE
SECURITE.
NUNCA MODIFIQUE EL EQUIPO NI USE
ADITAMENTOS QUE NO ESTEN APROBADOS POR LA NE JAMAIS MODIFIER L’EQUIPEMENT NI SE SERVIR
COMPAÑIA MELROE. D’ACCESSOIRES QUE NE SONT P AS APPROUVES
PAR MELROE COMPANY.
MANTENGA LOS PIES EN LOS PEDALES.
MAINTENIR LES PIEDS SUR LES PEDALES.
EN LA PENDIENTES, MANTENGA EL EXTREMO
PESADO DE CARGADOR EN POSICION DANS LES PENTES, T OUJOURS MAINTENIR LA
ASCENDENTE. PARTIE LA PLUS LOURDE DE LA CHARGEUSE VERS
LE HAUT.
ANTES DE BAJARSE DEL CARGADOR
POUR QUITTER LA CHARGEUSE:
1. BAJE LOS BRAZOS DE ELEVACION.
COLOQUE EL ADITAMENTO BEIN EN EL SUELO. 1. ABAISSER LES BRAS DE LEVAGE.
POSER L’EQUIPEMENT A PLATE SUR LE SOL.
2. PARE EL MOTOR. 2. ARRETER LE MOTEUR.
3. PONGA EL FRENO. 3. ENCLENCHER LE FREIN DE STATIONNEMENT.
4. LEVANTE LA BARRA DEL ASIENTO. 4. RELEVER L’ARCEAU DE SECURITE.
MUEVA LOS PEDALES HAST A QUE AMBOS SE DEPLACER LES PEDALES JUSQU’A CE
TRABEN. QU’ELLES SOIENTE T OUTES DEUX
VERROILLEES.
450 Bobcat Loader
–61– Operation & Maintenance Manual