Jacobsen LD300 Setup guide

WARNING: If incorrectly used this machine can cause severe injury. Those who use
and maintain this machine should be trained in its proper use, warned of its dangers
and should read the entire manual before attempting to set up, operate, adjust or
service the machine.
OWNER/OPERATOR’S MANUAL
& ILLUSTRATED PARTS LIST
4132502 REV B
MODEL:
73-70605A LOADER FRONT END LD300

CALIFORNIA
Proposition 65 Warning
Diesel engine exhaust and some of
its constituents are known to the State
of California to cause cancer, birth
defects and other reproductive harm.
Californie Proposition 65
Avertissement
Les échappements des moteurs diesel
et certains de leurs composés sont
reconnus par l’Etat de Californie pour
être cancérigènes, provoquer des
défauts congénitaux et d’autres dangers
en matière de reproduction.
ADVERTENCIA
AVERTISSEMENT
WARNING
The engine exhaust from this product
contains chemicals known to the State
of California to cause cancer, birth
defects or other reproductive harm.
California Advertencia
de la Proposicion 65
El estado de California hace saber que
los gases de escape de los motores
diesel y algunos de sus componentes
producen cáncer, defectos de
nacimiento y otros daños en el
proceso de reproducción humana.
L’ é mission du moteur de ce mat é riel
contient des produits chimiques que
l’Etat de Californie consid è re ê tre
canc é rig è nes, provoquer des d é fauts
cong é nitaux et d’autres dangers en
mati è re de reproduction.
El estado de California hace saber
que los gases de escape de este
producto contienen productos
quÍmicos que producen cáncer,
defectos de nacimiento y otros daños
en el proceso de reproducción
humana.
© 2003, TEXTRON INC

1
LOADER
LD300
IMPORTANTMESSAGE
Thank you for purchasing this Jacobsen product. You have purchased a world class product, one of the best
designed and built anywhere.
This product comes with an Owner/Operator's Manual. The useful life and good service you receive from this
product depends to a large extent on how well you read and understand this manual. Treat this product properly
and adjust it as instructed, and it will give you many years of reliable service.
See a Jacobsen dealer for any service or parts needed. Jacobsen service ensures that you continue to receive
the best results possible from Jacobsen products. You can trust Jacobsen replacement parts because they are
manufactured with the same high precision and quality as the original parts.
Jacobsen designs and builds its equipment to serve many years in a safe and productive manner. For longest
life, use this product only as directed in the manual, keep it in good repair and follow safety warnings and
instructions. You'll always be glad you did.
Jacobsen, a Textron Company
One Bob Cat Lane
Johnson Creek, WI 53038-0469
1-2005
TABLE OF CONTENTS FIGURES PAGE
DESCRIPTION / SPECIFICATIONS .............................................................................................................. 2
SAFETY ..................................................................................................................................................... 3, 4
INSTALLATION INSTRUCTIONS .................................................................................................................. 5
OPERATION .................................................................................................................................................. 6
SERVICE ....................................................................................................................................................... 7
FRAME PARTS .................................................. FIGURE 1 ..................................................................... 8, 9
HYDRAULICS .................................................... FIGURE 2 ..................................................................10, 11

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LOADER
LD300
DESCRIPTION / SPECIFICATIONS
SPECIFICATIONS
Lift Height..................................................................................... 73"
Maximum lift capacity .................................................................. 200 lbs.
Break-out Force ........................................................................... 365 lbs.
Clearance with attachment dumped............................................ 53"
Reach at full height...................................................................... 30"
Reach with attachment on ground............................................... 27"
Overall height in carry position .................................................... 49"
Rated pressure at 3600 engine rpm............................................ 750 psi
Pump Flow at 3600 engine rpm .................................................. 7.8 gpm
Oil Capacity.................................................................................. 2-1/2 gal.
Cylinder size ................................................................................ 2 X 20
Bucket rollback ............................................................................ 15o
Bucket volume ............................................................................. 6 cu. ft. (approx.)
Bucket width ................................................................................ 48"
Weight.......................................................................................... 702 lbs.
DESCRIPTION
The front end Loader is designed exclusively for use with the 420 tractor. The quick attach feature is very
desirable for owners who use the tractor for various jobs.
Standard equipment is the 48" bucket. A weight bar with 6 weights is required for use with the loader.
Uses include material handling of bulky materials, manures, gravel, sand etc. with excellent
maneuverability and ease of handling. The 4 wheel-drive allows the small unit to perform tasks surpassing
other small loaders.

3
LOADER
LD300 SAFETY
NOTICE !!!
Unauthorized modifications may present extreme
safety hazards to operators and bystanders and
could also result in product damage.
Jacobsen, a Textron Company strongly warns
against, rejects and disclaims any modifications,
add-on accessories or product alterations that are
not designed, developed, tested and approved by
Jacobsen Engineering Department. Any Jacobsen
product that is altered, modified or changed in any
manner not specifically authorized after original
manufacture–includingtheadditionof“after-market”
accessories or component parts not specifically
approved by Jacobsen–will result in the Jacobsen
Warranty being voided.
Anyandallliabilityforpersonalinjuryand/orproperty
damagecausedbyanyunauthorizedmodifications,
add-on accessories or products not approved by
Jacobsen will be considered the responsibility of
the individual(s) or company designing and/or
making such changes. Jacobsen will vigorously
pursuefull indemnificationand costs fromany party
responsibleforsuchunauthorizedpost-manufacture
modifications and/or accessories should personal
injury and/or property damage result.
This symbol means:
ATTENTION!
BECOME ALERT!
Your safety and the safety of others is involved.
Signal word definitions:
The signal words below are used to identify levels
of hazard seriousness. These words appear in this
manual and on the safety labels attached to
Jacobsenmachines.Foryoursafety and thesafety
ofothers,readandfollowtheinformationgivenwith
thesesignalwordsand/orthesymbolshownabove.
DANGER indicates an imminently hazardous
situationwhich, ifnot avoided,WILL result indeath
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. It may also be used to alert
against unsafe practices or property damage.
CAUTION used without the safety alert symbol
indicates a potentially hazardous situation which, if
not avoided, MAY result in property damage
MODEL NUMBER: This number appears on
sales literature, technical manuals and price
lists.
SERIAL NUMBER: This number appears only
on your mower. It contains the model number
followed consecutively by the serial number.
Use this number when ordering parts or seeking
warranty information.

4
LOADER
LD300
1. Read and understand the Owner’s Manual before attempting to operate this machine.
2. Operate all controls from the operator’s seat. NO RIDERS.
3. Keep all shields in place and safety switches adjusted properly.
4. Do not leave equipment unattended. STOP the engine and remove the key.
5. Do not allow minors or the inexperienced to operate this machine.
6. Keep people and pets a safe distance away from machine using power driven attachments. Injury
could result from flying debris.
GENERALSAFETY
OPERATINGSAFETY
1. DO NOT attempt to work on unit or any
attachments with the engine running. STOP
ENGINE!
2. DO NOT exceed recommended loads.
3. Always carry the load low.
SAFETY
4. Before leaving the operator's seat:
• Disengage PTO drive.
• Set Parking brake.
•Lower bucket.
• Stop Engine.

5
LOADER
LD300 INSTALLATION INSTRUCTIONS
MOUNTING INSTRUCTIONS
1. Install mounting shaft through tractor frame and secure with bolt. Place clamp over each end of shaft.
2. Drive tractor carefully into position until the front lift latches.
3. Raise tractor front lift to tilt loader onto mounting shaft.
4. Place clamps in position and tighten.
5. Install pump drive belt.
6. Install weight bar and 6 weights.
REMOVAL INSTRUCTIONS
1. Raise bucket approximately 20" from the floor.
2. Loosen clamps to mounting shaft.
3. Stop engine and remove pump drive belt.
4. Carefully lower tractor front lift, allowing loader to tip forward until bucket rests on floor.
5. Release quick attach and carefully back tractor away from loader.
6. Block or support frame of loader in case of accidental movement of control levers which will affect the
position of the loader for re-mounting.
7. Remove mounting shaft if desired.
8. Remove weights from weight bar.

6
LOADER
LD300
OPERATION
OPERATING INSTRUCTIONS
1. SAFETY FIRST! Always carry the load low.
2. Drive very carefully over rough terrain.
3. REMEMBER when raising the loader it increases the chances of tipping over due to the weight and its
effect upon the center of gravity.
4. With the tractor engine running, engage PTO to start pump.
5. Operate valve levers carefully. The left lever raises and lowers the loader. This lever has a float
position also. The right lever controls the bucket position.
Always remove weights from weight bar when
loader is removed.

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LOADER
LD300 SERVICE
MAINTENANCEINSTRUCTIONS
1. Check oil level with all cylinders retracted. Oil level should reach the notch on the dipstick.
2. Lubrication:
•Use TRC 6440 oil only.
•Grease every 8 hours of operation.
TROUBLE SHOOTING CHART
POSSIBLE CAUSE REMEDY
SYMPTOM: Loader will not lift.
1. Pump drive belt slipping or missing.
2. Low oil level.
3. Load in bucket is too heavy.
SYMPTOM: Loader leaks down or settles with load.
1. Lift cylinders leaking.
2. Hydraulic valve leaking.
3. Hoses or fittings leaking.
SYMPTOM: Oil sprays or leaks at filler cap.
1. Check pump drive belt for correct size and
adjustment.
2. Fill to proper oil level with cylinders
retracted.
3. Do not exceed maximum recommended
transport loads of 200 pounds.
1. Replace cylinder seals.
2. Replace seals in hydraulic valve or replace
valve assembly.
3. Repair or replace leaking hoses or fittings.
1. Oil reservoir is too full. 1. Do not over-fill. Always check oil level with
loader down and bucket rolled back with all
cylinders retracted.

8
LOADER
LD300
FRAME PARTS
FIGURE 1

9
LOADER
LD300
ITEM PART NO. DESCRIPTION QTY ITEM PART NO. DESCRIPTION QTY
FRAME PARTS
FIGURE 1
1-1 64-116 PIN 12
1-2 23-015 CYL 2
1-3 24-029 DIPSTICK, LOADER 5" 1
1-4 4132518.7 BOOM FRAME 1
1-5 4132514.7 SUB-FRAME 1
1-6 99-C0406 SCREW 12
1-7 64140-15 COTTER PIN 12
1-8 80-122 SHAFT, MOUNTING 1
1-9 64-428.7 CLAMP,LDR MOUNT 2
1-10 64-429 BOLT,LDR CLAMP 2
1-11 4132719.7 BUCKET 1
70-107 CUTTING EDGE REP KIT 1
1-12 23-016 CYL, 2 X 20 SIDE PORT 2
1-13 29-010 S/B GREASE FITTING 4
1-14 4134161 TUBE AND HOSE CLMP 1/4" 2
1-15 64163-84 WSR-1.015X1.75X.12510
1-16 64152-61 8-32 X 1 1/4 MACH SCREW 2
1-17 64025-29 NUT-HEX #8-32 KEPS 2
1-18 64123-50 BOLT-HEX 3/8-16X1 1
1-19 64141-4 NUT-WLF 3/8-16 5
1-20 202525 DECAL, CAUTION RD MAN 1
1-21 00-282 DECAL, CLS CLEAR AREA 2
* 00-031 DECAL-HYDRAULIC OIL 1
* 4116761 LABEL-MADE IN USA 1
* NOT ILLUSTRATED

10
LOADER
LD300
HYDRAULICS
FIGURE 2
32
33

11
LOADER
LD300
ITEM PART NO. DESCRIPTION QTY ITEM PART NO. DESCRIPTION QTY
HYDRAULICS
FIGURE 2
2-1 25-3503-6-6 FITTING-45 4
2-2 4132485 BULKHEAD TEE 2
2-3 20-035 HOSE-3/8 X 40 3
2-4 4132458 HOSE-3/8 X 30 1
2-5 25-06CP-6 FITTING-CAP 1
2-6 25-213T-6-6 FITTING-TEE 3
2-7 23-030 HANDLE, VALVE MPV 2
2-8 20-027 HOSE-1/4 X 22 1
2-9 23-017 VALVE-RELIEF 1
2-10 25-0503-6-8 FITTING-STR 2
2-11 20-033 HOSE, 3/8 X 56 100R2 #8 JIC 1
2-12 4132468 HOSE-1/4 X 33 1
2-13 4132470 HOSE-1/4 X 62 1
2-14 23-016 CYLINDER 2
21-0A001665 SEAL KIT FOR CYL 1
2-15 25-2103-6-6 FITTING-90 5
2-16 20-032 HOSE-3/8 X 48 1
2-17 25-2503-8-8 FITTING-90 1
2-18 21-011 BARNES PUMP .5 CU. IN. 1
2-19 83-BK60H PULLEY, FOR 60" DECK 1
(INCLUDES ITEM 22)
2-20 25-0503-10-10 FITTING-STR 1
2-21 23-H08 BUSHING 1
2-22 85-K0208 KEY 1
2-23 21-093 FILTER-HYDRAULIC 1
2-24 25-2103-12-8 FITTING-90 1
2-25 22-007 HOSE, PUSH LOCK 5/8 X 12 1
2-26 21-057 FILTER HEAD 1
2-27 25-0103-8-10 FITTING-STR 1
2-28 81-A026 BELT, A26 1
2-29 4132463 HOSE-1/4 X 40 1
2-30 4132469 HOSE-1/4 X 44 2
2-31 23-015 CYLINDER, 2 X 20 REGULAR2
21-0A001665 SEAL KIT FOR CYLINDER 1
2-32 64141-4 NUT-WLF 3/8-162 2
2-33 64123-15 BOLT-3/8-16X3/4 HEX 2

BOB-CAT BROUWER BUNTON CUSHMAN RYAN STEINER
Equipment from Jacobsen, a Textron company,
is built to exacting standards ensured by
ISO 9001 and ISO 14001 registration at all our
manufacturing locations.
A worldwide dealer network and factory-trained
technicians backed by Textron Parts Xpress
provide reliable, high-quality product support.