KUBOTA Loader LA271 LA301 LA351 LA401 Workshop Service Manual

SAFETY INSTRUCTIONS LA271 • LA301 • LA351 • LA401 WSM. 17020 A SAFETY FIRST This symbol, the industry's "Safety Alert Symbol" I is used throughout this manual and decals on the machine Itself to warn of the possibility of personal injury. Read these instructions carefully. It is essential that you read the instructions and safety regulations before you attempt to repair or use this unit. A DANGER : Indicates an imminently hazardous situation which, if not avoided, will result In death or serious Injury. A WARNING: Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury. A CAUTION : Indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury. • IMPORTANT : Indicates that equipment or property damage could result if instructions are not followed. : Gives helpful information. I_NOTE I OOOOOZOOO10 00000F00010 BEFORE SERVICING AND REPAIRING (1) Read all instructions and safety instructions in this manual and on your machine safety decals. (2) Clean the work area and machine. (3) Park the machine on a firm and level ground, and set the parking brake. (4) Lower the implement to the ground. (5) Stop the engine, and remove the key. (6) Disconnect the battery negative cable. (7) Hang a "DO NOT OPERATE" tag in operator station. OOOOOZOO020

lA271 • LA301 • LA351 • LA401 WSM, 17020 SAFETY INSTRUCTIONS OOOOOFOOO20 OOOOOFOO030 OOOOOFOO050 SAFETY STARTING (1) Do not start the engine by shorting across starter terminals or bypassing the safety start switch. (2) Do not alter or remove any part of machine safety system. (3) Before starting the engine, make sure that all shift levers are in neutral positions or in disengaged positions. (4) Never start the engine while standing on ground. Start the engine only from operator's seat. 00000Z00030 SAFETY WORKING (1) Do not work on the machine while under the influence of alcohol, medication, or other substances or while fatigued. (2) Wear close fitting clothing and safety equipment appropriate to the job. (3) Use tools appropriate to the work. Makeshift tools, parts, and procedures are not recommended. (4) When servicing is performed together by two or more persons, take care to perform all work safely. (5) Do not work under the machine that is supported solely by a jack. Always support the machine by safety stands. (6) Do not touch the rotating or hot parts while the engine is running. (7) Never remove the radiator cap while the engine is running, or immediately after stopping. Otherwise, hot water will spout out from radiator. Only remove radiator cap when cool enough to touch with bare hands. Slowly loosen the cap to first stop to relieve pressure before removing completely. (8) Escaping fluid (fuel or hydraulic oil) under pressure can penetrate the skin causing serious injury. Relieve pressure before disconnecting hydraulic or fuel lines. Tighten all connections before applying pressure. 00000Zoo040 AVOID FIRES (1) Fuel is extremely flammable and explosive under certain conditions. Do not smoke or allow flames or • + - sparks in your working area. (2) To avoid sparks from an accidental short circuit, always disconnect the battery negative cable first and connect it last. (3) Battery gas can explode. Keep sparks and open flame away from the top of battery, especially when charging the battery. (4) Make sure that no fuel has been spilled on the engine. 00000Z00050 2

SAFETY INSTRUCTIONS 1..A271 • LA301 • LA351 • LA401 WSM. 17020 OOOOOFOO090 VENTILATE WORK AREA (1) If the engine must be running to do some work, make sure the area is well ventilated. Never run the engine in a closed area. The exhaust gas contains poisonous carbon monoxide. OOOOOZ00060 PREVENT ACID BURNS (1) Sulfuric acid in battery electrolyte is poisonous. It is strong enough to burn skin, clothing and cause blindness if splashed into eyes. Keep electrolyte away from eyes, hands and clothing. If you spill electrolyte on yourself, flush with water, and get medical attention immediately. OOOOOZOOO70 DISPOSE OF FLUIDS PROPERLY (1) Do not pour fluids into the ground, down a drain, or into a stream, pond, or lake. Observe relevant environmental protection regulations when disposing of oil. fuel. coolant. electrolyte and other harmful waste. OOOOOZOO080 PREPARE FOR EMERGENCIES (1) Keep a first aid kit and fire extinguisher handy at all times. (2) Keep emergency numbers for doctors, ambulance service. hospital and fire department near your telephone. OOOOOZOO090 3

lA271 -lA301 -LA351 -LA401 WSM, 17020 SAFETY INSTRUCTIONS SAFETY DECALS • The following safety decals are installed on the machine. If a decal becomes damaged, Illegible or is not on the machine, replace it. The decal part number is listed in the parts list. (1 )Part No. 75546-56441 (AWARNING' TO AVO! 0 !NJ URY FROM FALLS OR BEING CRUSHED ; J. 00 t{l1 stand or work tJnder r a I sed loader Of bucket, 1, DO NOT use I cade. as a "'Oflo: pIaU arll. NEVER connect chaIn. cable r¥ rope 10 loader bucket whd4. operat Ins loader, (4)Part No. 75546-56431 (A DANGERI TO AVOID SERIOUS INJURY OR DEATH CAUSED BY FALL I NG LOADS L Load on raISed buckt'L or fork can rail or rol! back onto- operator causln9 ser IOUS Injury or death. l, Use 3;Jpro'yed clampln9 and I Of Suard attachments fOf handling lar'3e. looo;;e or sniflable such as bales, poSlS. sheets ot plY'tlooO etc· Carr';! leeds as I!IV as: PGs'Slble, (2)Part No. 75546-56451 ACAUTIONl TO AVOID PERSONAL INJURY : I, Observe safety precaution'S In leader and tractor OCieralo,'s Manual· 2, ODe(ale the loader from traCtor seat 3. Keep cnJldrel'l, others and I t."enock ali3y when optrat- 1"9 loader and lraclor, 4. Avoid holes. loost ground. and rocks which /lay cause lraclcr I loader to tip. S, 'When parking or storing. choose rIal and hard gr OU'ld. Lowtr the bucket to the ground, set brakes and rel'lO\ie ke\J before lea\iing tractor. 6, Br(ore hydrau- liC IIt'lts. relINe all '"Pauli, pr essur e, (5)Part No. 75567-56422 (3) Part No. 75546-56415 TO AVOID SERIOUS INJURY OR DEAT H CAUSE D BY ROLLovERS L RCf'S and a fastened seat be!r are recOfI"lIIIended In allWlscall aP9lm:liOtlS rol:2ble RefS shaulc be :0 IIpr I gilt and IodiN j)JJ.ltIOtilf Z. Adju\l rear whtels Hi the ViceS! selling tr..at IS suitable for the vork, t Add recOtMlended wheel ballut or rear lo.Ielghi for s:taiH I It':!' 4. 00 NlT drive on slopes or S. Carry loader at \01.1 posH :00 dur lAg tranSPOrt, Move and :torn tractor at slav speeds, CARE OF DANGER, WARNING AND CAUTION LABELS 1. Keep danger, warning and caution labels clean and free from obstructing material. 2. Clean danger, warning and caution labels with soap and water. dry with a soft cloth. 3. Replace damaged or missing danger, warning and caution labels with new labels from your local KUBOTA Dealer. 4. If a component with danger, warning and caution label (5) affixed is replaced with new part, make sure new label (s) is (are) attached in the same location (s) as the replaced component. 5. Mount new danger, warning and caution labels by applying on a clean dry surface and pressing any bubbles to outside edge. 17020FOOO10 17020Z00020 4

TERMINOLOGY lA271 • LA301 • LA351 • LA401 WSM, 17020 TERMINOLOGY 17020F00020 (1) Bucket Cylinder (4) Side Frame (6) Main Frame (8) Boom Cylinder (2) Boom (5) Mounting Pin (7) Bucket (9) Brace (3) Hydraulic Control Valve 17020Z00030 5

LA271 • LA301· LA351· LA401 WSM, 17020 SPECIFICATIONS SPECIFICATIONS LOADER SPECIFICATIONS Model LA271 LA301 LA351 LA401 ASAE Rated Lift Capacity 270 kg (595 Ibs) 300 kg (660 Ibs) 350 kg (770 Ibs) 400 kg (882Ibs) ASAE Rated Brakeout Force 450 kg (1000 Ibs) 520 kg (1150 Ibs) 605 kg (1335 Ibs) 720 kg (1586 Ibs) Boom Cylinder Bore 38 mm (1.50 in.) 45 mm (1.75 in.) Stroke 307 mm (12.10 in.) 289 mm (11.40 in.) 435 mm (17.14 in.) Bucket Cylinder Bore 38 mm (1.50 in.) 45 mm (1.75 in.) Stroke 330 mm (13.00 in.) 450 mm (17.72 in.) Control Valve 3 Position Bucket Control Valve Type - One Detent Float Position, Power Beyond Circuit 4 Position Bucket Control Valve Type One Detent Float Position, Two Stage Bucket Dump, Power Beyond Circuit Relief Valve Setting Pressure 133.5 to 140 kgf/cm 2 (1900 to 2000 psi) 147.5 to 154.6 kgf/cm 2 (2100 to 2200 psi) 133.5 to 140.5 kgf/cm 2 (1900 to 2000 psi) Net Weight (Approx.) 208 kg (460 Ibs) 216 kg (475 Ibs) 226 kg (500 Ibs) 280 kg (617 Ibs) BUCKET SPECIFICATIONS Model LA271, LA301 LA351 LA401 Type Square 48 Square 50 Square 54 Square 60LM Width 1220 mm (48.0 in.) 1270 mm (50.0 in.) 1372 mm (54.0 in.) 1524 mm (60.0 in.) Length 465 mm (18.3 in.) 490 mm (19.3 in.) 478 mm (18.8 in.) 518 mm (20.4 in.) Height 490 mm (19.2 in.) 516 mm (20.3 in.) 530 mm (20.9 in.) Capacity Struck 0.15 m 3 (5.2 cu.ft.) 0.16 m 3 (5.5 cu.ft.) 0.19 m 3 (6.7 cu.ft.) 0.23 m 3 (8.1 cu. ft) Heaped 0.17 m 3 (6.2 cu.ft.) I 0.18 m 3 (6.5 cu.ft.) 0.23 m 3 (8.1 cu.ft.) 0.28 m 3 (9.9 cu.ft) Weight 54 kg (120 Ibs) I 62 kg (137Ibs) 79 kg (174Ibs) 82 kg (181 Ibs) 17020Z00040 6

I DIMENSIONS lA271 • LA301 • LA351 • LA401 WSM, 17020 OPERATING DIMENSIONS Item LA271 LA301 LA351 LA401 B7300 B1700, B2100. B2400GEAR B2400HST B2710 i Maximum Lifting Height (A) 1780 mm (70.1 in.) 1790 mm (70.5 in.) 2130 mm (83.9 in.) Clearance with Bucket Dumped (B) 1310 mm (51.6 in.) 1320 mm (52.0 in.) 1310 mm (51.6 in.) 1664 mm (65.5 in.) Reach at Maximum Height (C) 680mm (26.8 in.) 645mm (25.4 in.) 635mm (25.0 in.) 660mm (26.0 in.) Maximum Dump Angle (D) 45 deg. 40 deg. Reach with Bucket on Ground (E) 1280 mm (50.4 in.) 1295 mm (51.0 in.) 1320 mm (52.0 in.) 1376 mm (54.2 in.) Bucket Roll-back Angle (F) 24 deg. 26 deg. Digging Depth (G) 110 mm (4.3 in.) 95 mm (3,7 in.) 185 mm (7.3 in.) Overall Height in Carrying Position (H) 1150 mm (45.3 in.) 1160 mm (45.7 in.) 1195 mm (47.0 in.) B7300 (4WD) with 6 12 Front Tires and 8.3 16 Rear Tires. B1700 (4WD) with 6 12 Front Tires and 8.3 16 Rear Tires. B2100 (4WD) with 6 12 Front Tires and 9.5 16 Rear Tires. B2400 (4WD) with 7 - 12 Front Tires and 11.2 - 16 Rear Tires. B271 0 (4WD) with 7 - 12 Front Tires and 12.4 - 16 Rear Tires. A B H 12210FOO030 17020Z00050 PERFORMANCE RATINGS {NO LOAD} I Item LA271 LA301 LA351 LA401 Raise to Full Height 3.9 sec. 2.9 sec. 3.3 sec. 3.2 sec. Lowering Time 3.0 sec. 2.3 sec. 2.6 sec. 2.4 sec. Attachment Roll-back Time 2.5 sec. 2.0 sec. 2.7 sec. 2.4 sec. Attachment Dump Time 2.1 sec. 1.6 sec. 2.0 sec. 1.9 sec. 17020Z00060 7

MECHANISM CONTENTS [1] FEATURES ...................................................................................................... M-1 [2] HYDRAULIC CIRCUIT .................................................................................... M-2 [3] CONTROL VALVE ASSEMBLY .................................................................... M·3 (1) LA271 • L.A301 • LA351 (Old Type Valve) .................................................. M-3 (2) LA271 • LA301 • LA351 (New Type Valve) and LA401 (4 Position Bucket Control) ............................................................ M·11 (3) LA401 (3 Position Bucket ContrOl) ............................................................ M-19 [4] RELIEF VALVE ............................................................................................. M-23 [5] BOOM CYLINDER AND BUCKET CYLINDER ......................................... M-25

LA211 • LA301 • LA351 • LA401 WSM, 11020 MECHANISM [1] FEATURES 11020F00030 (1) Huge HOisting and Scooping Power (2) Fast Cycle Time (3) One-Lever Operation (4) Heavy-Duty Bucket (5) Long Arm Reach (6) Series Circuit Hydraulic Control Valve 17020MOOO10 M-1

KUBOTA Loader LA271 LA301 LA351 LA401 Workshop Service Manual

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