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Honda UMK450T Manual
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62VL510X.book 2 ページ 2019年2月8日 金曜日 午後1時11分
How to use this manual
INTRODUCTION
How to use this manual
This supplement covers the construction, function and
servicing procedures of the Honda UMK450T grass/
weed trimmer.
For service information that is not covered in this
supplement, please refer to the UMR435T base shop
manual (part number 62VL510) and UMK435T shop
manual supplements (part numbers 62VL510Z and
62VL510Y).
All information contained in this manual is based on the
latest product information available at the time of
printing. We reserve the right to make changes at
anytime without notice.
No part of this publication may be reproduced, stored in
a retrieval system, or transmitted, in any form, by any
means, electronic, mechanical, photocopying,
recording, or otherwise, without prior written permission
of the publisher. This includes text, figures, and tables.
As you read this manual, you will find information that is
preceded by a
message is to help prevent damage to this Honda
product, other property, or the environment.
SAFETY MESSAGES
Your safety and the safety of others are very important.
To help you make informed decisions, we have
provided safety messages and other safety information
throughout this manual. Of course, it is not practical or
possible to warn you about all the hazards associated
with servicing these products. You must use your own
good judgement.
You will find important safety information in a variety of
forms, including:
· Safety Labels – on the product.
· Safety Messages – preceded by a safety alert symbol
and one of three signal words, DANGER,
WARNING, or CAUTION.
These signal words mean:
You WILL be KILLED or SERIOUSLY
HURT if you don't follow instructions.
You CAN be KILLED or SERIOUSLY
HURT if you don't follow instructions.
You CAN be HURT if you don't follow
instructions.
· Instructions – how to service these products correctly
and safely.
© Honda Motor Co., Ltd. 2019
0-2
symbol. The purpose of this
OUTLINE OF CHANGES
SPECIFICATIONS
SERVICE INFORMATION
MAINTENANCE
TROUBLESHOOTING
FUEL SYSTEM
IGNITION SYSTEM
STARTING SYSTEM
MUFFLER
CLUTCH
ENGINE REMOVAL/INSTALLATION
CRANKCASE
CYLINDER HEAD
CUTTER/GEAR CASE
FRAME/THROTTLE
INDEX
The marked sections contain no changes.
They are not covered in this supplement.
1
2
3
4
5
6
7
8
9
10
11
12
13
14

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Summary of Contents for Honda UMK450T

  • Page 1 As you read this manual, you will find information that is CRANKCASE preceded by a symbol. The purpose of this message is to help prevent damage to this Honda CYLINDER HEAD product, other property, or the environment. CUTTER/GEAR CASE SAFETY MESSAGES FRAME/THROTTLE Your safety and the safety of others are very important.
  • Page 2 62VL510X.book 3 ページ 2019年2月8日 金曜日 午後1時11分 How to use this manual OUTLINE OF CHANGES Item UMK450T UMK435T PORT LINER [1] STUD BOLT (5 mm) [2] SELF-LOCKING NUT (5 mm) [3] PISTON PIN CLIP [1] GEAR CASE [1] U-NUT [2]...
  • Page 3 62VL510X.book 1 ページ 2019年2月8日 金曜日 午後1時11分 dummytext 1. SPECIFICATIONS SERIAL NUMBER LOCATION ·····················1-2 ENGINE SPECIFICATIONS ·························· 1-3 TYPE CODE ··················································1-2 DIMENSIONAL DRAWINGS························· 1-4 DIMENSIONS AND WEIGHTS SPECIFICATIONS ·········································1-3...
  • Page 4 62VL510X.book 2 ページ 2019年2月8日 金曜日 午後1時11分 SPECIFICATIONS SERIAL NUMBER LOCATION SPECIFICATIONS The engine serial number [1] is stamped on the crankcase lower side, and the frame serial number [2] is located on the frame pipe. Always specify these numbers when inquiring about the engine or when ordering parts in order to obtain the correct parts for the brush cutter being serviced.
  • Page 5 62VL510X.book 3 ページ 2019年2月8日 金曜日 午後1時11分 SPECIFICATIONS DIMENSIONS AND WEIGHTS SPECIFICATIONS Model UMK450T Description code HAPT Type U2TT U2ST U2NT UTNT UEBT UEDT Cutting Type 2-blade cutter Nylon 3-blade Nylon 3-blade Nylon attachment cutter cutter cutter cutter cutter Diameter 350 mm (13.8 in)
  • Page 6 62VL510X.book 4 ページ 2019年2月8日 金曜日 午後1時11分 SPECIFICATIONS DIMENSIONAL DRAWINGS U2TT/U2ST types: 640 mm (25.2 in) 1,950 mm (76.8 in) 440 mm (17.3 in) U2NT type: 640 mm (25.2 in) 1,950 mm (76.8 in) 440 mm (17.3 in)
  • Page 7 62VL510X.book 5 ページ 2019年2月8日 金曜日 午後1時11分 SPECIFICATIONS UTNT/UEDT/UEBT types: Nylon cutter type shown: 640 mm (25.2 in) 3-blade cutter type: 1,905 mm (75.0 in) 470 mm (18.5 in) Nylon cutter type: 1,875 mm (73.8 in) 470 mm (18.5 in)
  • Page 8 62VL510X.book 6 ページ 2019年2月8日 金曜日 午後1時11分 MEMO...
  • Page 9 62VL510X.book 1 ページ 2019年2月8日 金曜日 午後1時11分 dummytext 2. SERVICE INFORMATION MAINTENANCE STANDARDS ·····················2-2 LUBRICATION & SEAL POINT ···················· 2-4 TORQUE VALUES ········································2-3 CABLE/HARNESS ROUTING ······················ 2-5...
  • Page 10 62VL510X.book 2 ページ 2019年2月8日 金曜日 午後1時11分 SERVICE INFORMATION MAINTENANCE STANDARDS SERVICE INFORMATION ENGINE Unit: mm (in) Part Item Standard Service limit Engine Idle speed 3,100 ± 200 min (rpm) – Cylinder compression 1.03 MPa (10.5 kgf/cm , 149 psi) at – 2,000 min (rpm) Carburetor Main jet...
  • Page 11 62VL510X.book 3 ページ 2019年2月8日 金曜日 午後1時11分 SERVICE INFORMATION TORQUE VALUES ENGINE TORQUE VALUES Torque values Item Thread Dia. (mm) N·m kgf·m lbf·ft Spark plug 11.8 Fan cover mounting bolt (*CT bolt) Lower crankcase mounting bolt (*CT bolt) Recoil starter pulley Flywheel nut Ignition coil mounting socket bolt Valve adjusting screw lock nut Top cover socket bolt...
  • Page 12 62VL510X.book 4 ページ 2019年2月8日 金曜日 午後1時11分 SERVICE INFORMATION LUBRICATION & SEAL POINT ENGINE Material Location Remarks Use molybdenum oil Piston outer surface Amount: 0.7 g (0.02 oz) (reference) solution (mixture of engine Piston pin outer surface Amount: 0.7 g (0.02 oz) (reference) oil and molybdenum grease Piston rings Amount: 0.5 g (0.02 oz) (reference)
  • Page 13 62VL510X.book 5 ページ 2019年2月8日 金曜日 午後1時11分 SERVICE INFORMATION CABLE/HARNESS ROUTING THROTTLE CABLE HIGH TENSION CORD ENGINE STOP SWITCH WIRE GROUND TERMINAL FUEL TUBE FUEL RETURN TUBE 84 mm (3.3 in) 105 mm (4.1 in) FUEL RETURN TUBE FUEL TUBE...
  • Page 14 62VL510X.book 6 ページ 2019年2月8日 金曜日 午後1時11分 MEMO...
  • Page 15: Table Of Contents

    62VL510X.book 1 ページ 2019年2月8日 金曜日 午後1時11分 dummytext 3. MAINTENANCE MAINTENANCE SCHEDULE························3-2 CUTTING ATTACHMENT CHECK ··············· 3-7 ENGINE OIL LEVEL CHECK ························3-3 GRASS DEFLECTOR CHECK ····················· 3-7 ENGINE OIL CHANGE··································3-3 GEAR CASE GREASE UP ··························· 3-8 AIR CLEANER ELEMENT IDLE SPEED CHECK/ADJUSTMENT ·········· 3-8 CHECK/CLEANING·······································3-4 VALVE CLEARANCE SPARK PLUG...
  • Page 16: Maintenance Schedule

    62VL510X.book 2 ページ 2019年2月8日 金曜日 午後1時11分 MAINTENANCE MAINTENANCE SCHEDULE MAINTENANCE REGULAR SERVICE PERIOD (2) Perform at every indicated month or operating hour interval, whichever comes first. Every Every Every Every First ITEM year Refer Each month years months months page 10 hrs. 25 hrs.
  • Page 17: Engine Oil Level Check

    62VL510X.book 3 ページ 2019年2月8日 金曜日 午後1時11分 MAINTENANCE ENGINE OIL LEVEL CHECK Check the oil level with the engine stopped and place the engine on a level surface. Remove the oil filler cap [1]. Check the oil level [2]. If the oil level is lower than the bottom of the oil filler neck (upper level), fill to the upper level with the recommended oil.
  • Page 18: Air Cleaner Element

    62VL510X.book 4 ページ 2019年2月8日 金曜日 午後1時11分 MAINTENANCE AIR CLEANER ELEMENT CHECK/CLEANING A dirty air cleaner will restrict air flow to the carburetor, reducing engine performance. If the engine is operated in dusty areas, clean the air cleaner more often than specified in the MAINTENANCE SCHEDULE. Remove the air cleaner cover [1] by loosening the screw [2] on the top of the cover and unhooking its two lower tabs [3].
  • Page 19 62VL510X.book 5 ページ 2019年2月8日 金曜日 午後1時11分 MAINTENANCE Disconnect the spark plug cap and remove the spark plug [1] using a spark plug wrench [2]. Visually inspect the spark plug. Replace the plug if the insulator [1] is cracked or chipped. Remove carbon or other deposits with wire brush. Check the sealing washer [2] for damage.
  • Page 20: Throttle Cable

    62VL510X.book 6 ページ 2019年2月8日 金曜日 午後1時11分 MAINTENANCE THROTTLE CABLE CHECK/ADJUSTMENT Remove the air cleaner cover (page 3-4). Move the throttle lever lightly and check whether the carburetor side throttle cable free play is 0.5 – 2.5 mm (0.02 – 0.10 in) at the end of the cable [1]. FREE PLAY: 0.5 –...
  • Page 21: Cutting Attachment Check

    62VL510X.book 7 ページ 2019年2月8日 金曜日 午後1時11分 MAINTENANCE CUTTING ATTACHMENT CHECK 2/3-BLADE TYPE Turn the engine stop switch to the stop position and 2-BLADE shown: remove the spark plug cap. NORMAL: Check the blade cutter for wear and damage, and check for the dull blade. If the blade is worn, bent, cracked, or has other damage, replace the blade cutter with a new one (page 13-2).
  • Page 22: Gear Case Grease Up

    62VL510X.book 8 ページ 2019年2月8日 金曜日 午後1時11分 MAINTENANCE GEAR CASE GREASE UP Turn the engine stop switch to the stop position and U2TT/U2ST/U2NT type shown: remove the spark plug cap. Remove the bolt [1] from the gear case. Fill the gear case with the grease until it runs out from the bolt hole (about 15 –...
  • Page 23: Valve Clearance

    62VL510X.book 9 ページ 2019年2月8日 金曜日 午後1時11分 MAINTENANCE VALVE CLEARANCE CHECK/ADJUSTMENT Valve clearance inspection and adjustment must be performed with the engine cold. Remove the top cover (page 3-4). Disconnect the spark plug cap from the spark plug. Remove the breather tube [1] from the head cover. Remove the two socket bolts [2] and head cover [3].
  • Page 24: Fuel Tubes Check

    62VL510X.book 10 ページ 2019年2月8日 金曜日 午後1時11分 MAINTENANCE FUEL TUBES CHECK Gasoline is highly flammable and explosive. You can be burned or seriously injured when handling fuel. • Keep heat, sparks, and flame away. • Wipe up spills immediately. • Handle fuel only outdoors. Check the fuel tube [1] and fuel return tube [2] for damage, fuel...
  • Page 25 62VL510X.book 1 ページ 2019年2月8日 金曜日 午後1時11分 dummytext 5. FUEL SYSTEM AIR CLEANER FUEL TANK REMOVAL/INSTALLATION··························5-2 REMOVAL/INSTALLATION ························· 5-4 CARBURETOR CARBURETOR REMOVAL/INSTALLATION··························5-3 DISASSEMBLY/ASSEMBLY ························ 5-5...
  • Page 26: Air Cleaner Removal/Installation

    62VL510X.book 2 ページ 2019年2月8日 金曜日 午後1時11分 FUEL SYSTEM AIR CLEANER FUEL SYSTEM REMOVAL/INSTALLATION If these parts are left out, dirt will enter the intake system damaging the engine. O-RING (14.8 x 2.4 mm) INSTALLATION: Do not interchange with the O-ring on the exhaust side. AIR CLEANER CASE Pay attention to the INSTALLATION:...
  • Page 27: Carburetor Removal/Installation

    62VL510X.book 3 ページ 2019年2月8日 金曜日 午後1時11分 FUEL SYSTEM CARBURETOR REMOVAL/INSTALLATION Gasoline is highly flammable and explosive. You can be burned or seriously injured when handling fuel. • Keep heat, sparks and flame away. • Handle fuel only outdoors. • Wipe up spills immediately. If these parts are left out, dirt will enter the intake system damaging the engine.
  • Page 28: Fuel Tank

    62VL510X.book 4 ページ 2019年2月8日 金曜日 午後1時11分 FUEL SYSTEM FUEL TANK REMOVAL/INSTALLATION Gasoline is highly flammable and explosive. You can be burned or seriously injured when handling fuel. • Keep heat, sparks and flame away. • Handle fuel only outdoors. • Wipe up spills immediately. Remove the following: –...
  • Page 29: Carburetor

    62VL510X.book 5 ページ 2019年2月8日 金曜日 午後1時11分 FUEL SYSTEM CARBURETOR DISASSEMBLY/ASSEMBLY Gasoline is highly flammable and explosive. You can be burned or seriously injured when handling fuel. • Keep heat, sparks and flame away. • Handle fuel only outdoors. • Wipe up spills immediately. Remove the carburetor (page 5-3).
  • Page 30 62VL510X.book 6 ページ 2019年2月8日 金曜日 午後1時11分 MEMO...
  • Page 31 62VL510X.book 1 ページ 2019年2月8日 金曜日 午後1時11分 dummytext 6. IGNITION SYSTEM IGNITION COIL IGNITION COIL INSPECTION ······················ 6-3 REMOVAL/INSTALLATION··························6-2 IGNITION COIL AIR GAP ADJUSTMENT···· 6-4 SPARK TEST ················································6-3...
  • Page 32 62VL510X.book 2 ページ 2019年2月8日 金曜日 午後1時11分 IGNITION SYSTEM IGNITION COIL IGNITION SYSTEM REMOVAL/INSTALLATION Remove the top cover (page 3-4). HIGH TENSION CORD INSTALLATION: Attach the plug cap in the direction as shown in the figure. Attach the high tension cord to the high tension cord clip so that there is no slack.
  • Page 33 62VL510X.book 3 ページ 2019年2月8日 金曜日 午後1時11分 IGNITION SYSTEM SPARK TEST Gasoline is highly flammable and explosive. You can be burned or seriously injured when handling fuel. • Keep heat, sparks and flame away. • Handle fuel only outdoors. • Wipe up spills immediately. Unburnt gas can ignite if it is left in the cylinder.
  • Page 34 62VL510X.book 4 ページ 2019年2月8日 金曜日 午後1時11分 IGNITION SYSTEM IGNITION COIL AIR GAP ADJUSTMENT Remove the top cover (page 3-4). Insert an appropriate feeler gauge [1] between the ignition coil [2] and magnetic part [3] of the rotor. Air gap 0.2 – 0.4 mm (0.008 – 0.016 in) (at flywheel): Push the ignition pulse generator firmly against the rotor and tighten the two bolts [4].
  • Page 35 62VL510X.book 1 ページ 2019年2月8日 金曜日 午後1時11分 dummytext 7. STARTING SYSTEM RECOIL STARTER REMOVAL/INSTALLATION··························7-2...
  • Page 36 62VL510X.book 2 ページ 2019年2月8日 金曜日 午後1時11分 STARTING SYSTEM RECOIL STARTER STARTING SYSTEM REMOVAL/INSTALLATION RECOIL STARTER SOCKET BOLT (CT BOLT; 5 x 16 mm) TANK MOUNTING RUBBER (2) COLLAR (2) FUELTANK PROTECTOR SOCKET BOLT (CT BOLT; 5 x 30 mm) (2) SOCKET BOLT (CT BOLT;...
  • Page 37 62VL510X.book 1 ページ 2019年2月8日 金曜日 午後1時11分 dummytext 8. MUFFLER MUFFLER REMOVAL/INSTALLATION········8-2...
  • Page 38 62VL510X.book 2 ページ 2019年2月8日 金曜日 午後1時11分 MUFFLER MUFFLER REMOVAL/INSTALLATION MUFFLER The muffler becomes very hot during operation and remains hot for a while after stopping the engine. Be careful not to touch the muffler while it is hot. Allow it to cool before proceeding. Remove the top cover (page 3-4).
  • Page 39 62VL510X.book 1 ページ 2019年2月8日 金曜日 午後1時11分 dummytext 9. CLUTCH CLUTCH HOUSING RECOIL STARTER PULLEY REMOVAL/INSTALLATION··························9-2 REMOVAL/INSTALLATION ························· 9-5 CLUTCH SHOE/FLYWHEEL CLUTCH INSPECTION ································· 9-6 REMOVAL/INSTALLATION··························9-3...
  • Page 40: Clutch Housing Removal/Installation

    62VL510X.book 2 ページ 2019年2月8日 金曜日 午後1時11分 CLUTCH CLUTCH HOUSING CLUTCH REMOVAL/INSTALLATION Remove the frame pipe (page 14-2). CLUTCH HOUSING SOCKET BOLT (6 x 20 mm) (4) 6.9 N·m (0.70 kgf·m, 5.1 lbf·ft)
  • Page 41: Clutch Shoe/Flywheel Removal/Installation

    62VL510X.book 3 ページ 2019年2月8日 金曜日 午後1時11分 CLUTCH CLUTCH SHOE/FLYWHEEL REMOVAL/INSTALLATION Remove the clutch housing (page 9-2). CLUTCH INSTALLATION: The side with arrow marks indicating counterclockwise rotation must face the NUT (8 mm) fan cover side. INSTALLATION: FLYWHEEL Apply oil to the threaded area Arrow mark and seating surface.
  • Page 42 62VL510X.book 4 ページ 2019年2月8日 金曜日 午後1時11分 CLUTCH CLUTCH INSTALLATION Install the clutch so that arrow marks indicating counterclockwise rotation [1] are visible, as shown. Be sure to set the clutch washer between the clutch and flywheel. Holding the flywheel with a commercially available strap wrench, tighten the 8 mm clutch bolts and wave washers to the specified torque.
  • Page 43: Recoil Starter Pulley

    62VL510X.book 5 ページ 2019年2月8日 金曜日 午後1時11分 CLUTCH FLYWHEEL INSTALLATION Clean tapered part of dirt, oil, grease and other foreign material before installation. Be sure to woodruff key is set in the key groove properly. Install the flywheel by aligning the key groove of the flywheel with the key on the crankshaft.
  • Page 44: Clutch Inspection

    62VL510X.book 6 ページ 2019年2月8日 金曜日 午後1時11分 CLUTCH Install the recoil starter pulley [1] and hold it with a driver or equivalent tool [2]. Tighten the nut [3] to the specified torque. TORQUE: 6.4 N·m (0.65 kgf·m, 4.7 lbf·ft) Install the following: – Clutch shoe (page 9-2) –...
  • Page 45 62VL510X.book 1 ページ 2019年2月8日 金曜日 午後1時11分 dummytext 11. CRANKCASE LOWER CRANKCASE/SHROUD CRANKSHAFT/PISTON REMOVAL/INSTALLATION························11-2 REMOVAL/INSTALLATION ······················· 11-5 CRANKSHAFT/PISTON INSPECTION ······ 11-6 11-1...
  • Page 46 62VL510X.book 2 ページ 2019年2月8日 金曜日 午後1時11分 CRANKCASE LOWER CRANKCASE/SHROUD CRANKCASE REMOVAL/INSTALLATION Drain the engine oil (page 3-3). Remove the following: – Carburetor (page 5-3) – Fuel tank (page 5-4) – Muffler (page 8-2) – Flywheel (page 9-3) – Recoil starter pulley (page 9-5) Installation is in the reverse order of removal O-RING (14.8 x 2.4 mm) INSTALLATION:...
  • Page 47 62VL510X.book 3 ページ 2019年2月8日 金曜日 午後1時11分 CRANKCASE LOWER CRANKCASE REMOVAL/INSTALLATION Remove the two socket bolts (5 x 20 mm) [1] and four socket bolts (5 x 39 mm) [2]. Insert the screw driver or equivalent tool [3] into the recess [4] as shown, and remove the lower crankcase from the cylinder barrel.
  • Page 48 62VL510X.book 4 ページ 2019年2月8日 金曜日 午後1時11分 CRANKCASE SHROUD INSTALLATION Set the two bolts [1] on the shroud [2]. Take care not to allow the bolt heads to protrude from the shroud when installing on the cylinder barrel. 11-4...
  • Page 49 62VL510X.book 5 ページ 2019年2月8日 金曜日 午後1時11分 CRANKCASE CRANKSHAFT/PISTON REMOVAL/INSTALLATION Remove the lower crankcase (page 11-2). TIMING BELT PISTON RING INSPECTION: Check that the belt is not worn or INSTALLATION: cracked. Do not bend or twist the belt. · Install the top ring and second ring with the "N" mark facing up. ·...
  • Page 50 62VL510X.book 6 ページ 2019年2月8日 金曜日 午後1時11分 CRANKCASE CRANKSHAFT/PISTON INSPECTION CYLINDER SLEEVE I.D. Measure and record the cylinder I.D. at three levels in both the “X” axis (perpendicular to crankshaft) and the “Y” axis (parallel to crankshaft). Take the maximum reading to determine cylinder wear and taper. STANDARD: 43.000 –...
  • Page 51 62VL510X.book 7 ページ 2019年2月8日 金曜日 午後1時11分 CRANKCASE PISTON PIN O.D. Measure and record the piston pin O.D. at three points (both ends and middle). Take the minimum reading to determine piston pin O.D. STANDARD: 8.994 – 9.000 mm (0.3541 – 0.3543 in) SERVICE LIMIT: 8.950 mm (0.3527 in) If the measurement is less than the service limit, replace the piston pin.
  • Page 52 62VL510X.book 8 ページ 2019年2月8日 金曜日 午後1時11分 CRANKCASE CONNECTING ROD SMALL END I.D. Measure the connecting rod small end I.D. STANDARD: 8.983 – 8.994 mm (0.3537 – 0.3541 in) SERVICE LIMIT: Replace if exceeding the standard value. If the measurement is more than the service limit, replace the crankshaft.
  • Page 53 62VL510X.book 1 ページ 2019年2月8日 金曜日 午後1時11分 dummytext 12. CYLINDER HEAD ROCKER ARM/VALVES CYLINDER HEAD/VALVES REMOVAL/INSTALLATION························12-2 INSPECTION··············································· 12-3 12-1...
  • Page 54 62VL510X.book 2 ページ 2019年2月8日 金曜日 午後1時11分 CYLINDER HEAD ROCKER ARM/VALVES CYLINDER HEAD REMOVAL/INSTALLATION Remove the following: – Cam pulley (Base shop manual: page 12-2) – Crankshaft (page 11-5) VALVE SPRING RETAINER (2) REMOVAL: Push down and slide the retainer to the side, so the valve stem slips through the hole at the slide of the retainer.
  • Page 55 62VL510X.book 3 ページ 2019年2月8日 金曜日 午後1時11分 CYLINDER HEAD CYLINDER HEAD/VALVES INSPECTION CYLINDER COMPRESSION CHECK Warm the engine to normal operating temperature. Turn the engine switch to the OFF position. Drain the fuel from the fuel tank. Drain the fuel from the carburetor by pushing the carburetor primer pump.
  • Page 56 62VL510X.book 4 ページ 2019年2月8日 金曜日 午後1時11分 MEMO...
  • Page 57 62VL510X.book 1 ページ 2019年2月8日 金曜日 午後1時11分 dummytext 13. CUTTER/GEAR CASE BLADE CUTTER/GEAR CASE/DEFLECTOR GEAR CASE REMOVAL/INSTALLATION························13-2 DISASSEMBLY/ASSEMBLY ···················· 13-10 NYLON CUTTER/GEAR CASE/DEFLECTOR REMOVAL/INSTALLATION························13-7 13-1...
  • Page 58 62VL510X.book 2 ページ 2019年2月8日 金曜日 午後1時11分 CUTTER/GEAR CASE BLADE CUTTER/GEAR CUTTER/GEAR CASE CASE/DEFLECTOR REMOVAL/INSTALLATION • Turn the engine stop switch to the STOP position and remove the spark plug cap before removing the blade cutter/gear case. • Be sure to remove wear gloves to protect your hands.
  • Page 59 62VL510X.book 3 ページ 2019年2月8日 金曜日 午後1時11分 CUTTER/GEAR CASE UTNT/UEBT/UEDT types: SPECIAL NUT (Left-hand threads; 10 mm) INSPECTION: Inspect for damage before installation and replace with new one if necessary. TORQUE: 24.0 N·m (2.4 kgf·m, 18 lbf·ft) GRASS DEFLECTOR BLADE HOLDER B INSPECTION: Check the grass deflector for 3-BLADE CUTTER cracks and damage, and replace...
  • Page 60 62VL510X.book 4 ページ 2019年2月8日 金曜日 午後1時11分 CUTTER/GEAR CASE Remove the special nut (Left hand threads: 10 mm) [1] 2-blade cutter type shown: while holding the hexagon wrench [2]. And then remove the blade nut cover [3], blade holder B [4] and blade cutter [5]. Install the following as shown: –...
  • Page 61 62VL510X.book 5 ページ 2019年2月8日 金曜日 午後1時11分 CUTTER/GEAR CASE UTNT/UEBT/UEDT types Install the gear case [1] by aligning the screw/washer installation hole [2] with the hole [3] in the frame pipe. Tighten the screw/washer [4] to the specified torque. TORQUE: 4.2 N·m (0.4 kgf·m, 3.1 lbf·ft) After tightening the screw/washer, tighten the socket bolts [5] to the specified torque.
  • Page 62 62VL510X.book 6 ページ 2019年2月8日 金曜日 午後1時11分 CUTTER/GEAR CASE 3-BLADE TYPE (UEDT/UEBT types) Remove the four socket bolts [1], protector holder [2] and grass deflector [3]. UEDT type: Installation is in the reverse order of removal. • When installing the protector holder as shown. TORQUE: DEFLECTOR MOUNTING SOCKET BOLT 5.2 N·m (0.5 kgf·m, 3.8 lbf·ft) UEBT type:...
  • Page 63 62VL510X.book 7 ページ 2019年2月8日 金曜日 午後1時11分 CUTTER/GEAR CASE NYLON CUTTER/GEAR CASE/DEFLECTOR REMOVAL/INSTALLATION • Turn the engine stop switch to the STOP position and remove the spark plug cap before removing the nylon cutter/gear case. • Be sure to remove wear gloves to protect your hands.
  • Page 64 62VL510X.book 8 ページ 2019年2月8日 金曜日 午後1時11分 CUTTER/GEAR CASE NYLON CUTTER REMOVAL/INSTALLATION Align the hole [1] in the grass guard and the groove in the blade holder A [2] as shown, and insert the hexagon wrench [3]. Holding the hexagon wrench, turn the nylon cutter [4] clockwise and remove it.
  • Page 65 62VL510X.book 9 ページ 2019年2月8日 金曜日 午後1時11分 CUTTER/GEAR CASE GRASS DEFLECTOR REMOVAL/INSTALLATION Remove the four socket bolts [1], protector holder [2] and grass deflector [3]. UEDT/UTNT type: Installation is in the reverse order of removal. • When installing the protector holder as shown. TORQUE: DEFLECTOR MOUNTING SOCKET BOLT 5.2 N·m (0.5 kgf·m, 3.8 lbf·ft) UEBT type:...
  • Page 66 62VL510X.book 10 ページ 2019年2月8日 金曜日 午後1時11分 CUTTER/GEAR CASE GEAR CASE DISASSEMBLY/ASSEMBLY Remove the gear case: – Blade cutter type (page 13-2) – Nylon cutter type (page 13-7) Heat the gear case to 100 °C (212 °F) evenly using a heat gun. When the entire of the gear case becomes hot, remove/install each part from/to the gear case quickly. After assembly, pour the grease into the gear case (page 3-8).
  • Page 67 62VL510X.book 11 ページ 2019年2月8日 金曜日 午後1時11分 CUTTER/GEAR CASE GEARSHAFT BEARING REPLACEMENT UPPER SIDE: Remove the ball bearing (6001) [1] from the gearshaft [2] by using a commercially available bearing puller [3] and hydraulic press. Install the new ball bearing (6001) [1] to the gearshaft [2] and loosely tighten the nut [3].
  • Page 68 62VL510X.book 12 ページ 2019年2月8日 金曜日 午後1時11分 MEMO...
  • Page 69 62VL510X.book 1 ページ 2019年2月8日 金曜日 午後1時11分 dummytext 14. FRAME/THROTTLE FRAME PIPE/THROTTLE CABLE/GROUND HANDLE PIPE/THROTTLE LEVER CABLE REMOVAL/INSTALLATION ··········14-2 REMOVAL/INSTALLATION ······················· 14-4 ENGINE STOP SWITCH INSPECTION ······ 14-8 14-1...
  • Page 70 62VL510X.book 2 ページ 2019年2月8日 金曜日 午後1時11分 FRAME/THROTTLE FRAME PIPE/THROTTLE FRAME/THROTTLE CABLE/GROUND CABLE REMOVAL/INSTALLATION REMOVAL Remove the air cleaner cover (page 3-4). Disconnect the engine stop switch connector [1]. Remove the screw/washer [2] and disconnect the ground cable [3]. Loosen the throttle cable lock nut, and disconnect the throttle cable [4] from the swivel [5].
  • Page 71 62VL510X.book 3 ページ 2019年2月8日 金曜日 午後1時11分 FRAME/THROTTLE Set the throttle cable lock nut [1] and adjust nut [2] at the ends of the threads as shown. Install the throttle cable end [1] from the round hole [2] side in the swivel [3] of the carburetor throttle. Set the throttle cable on the cable stay [4].
  • Page 72 62VL510X.book 4 ページ 2019年2月8日 金曜日 午後1時11分 FRAME/THROTTLE HANDLE PIPE/THROTTLE LEVER REMOVAL/INSTALLATION Remove the following: – Frame pipe (page 14-2) – Gear case/grass deflector: – Blade cutter type (page 13-2) – Nylon cutter type (page 13-7) UEDT/UEBT/UTNT/U2NT types: THROTTLE LEVER GRIP HANDLE GRIP SCREW (5 x 30 mm) 2.3 N·m (0.2 kgf·m, 1.7 lbf·ft)
  • Page 73 62VL510X.book 5 ページ 2019年2月8日 金曜日 午後1時11分 FRAME/THROTTLE U2TT/U2ST types: THROTTLE LEVER ASSEMBLY L. HANDLE GRIP NUT (5 mm) SCREW (5 x 30 mm) 2.3 N·m (0.2 kgf·m, 1.7 lbf·ft) SOCKET BOLT (6 x 30 mm) (4) R. HANDLE GRIP 6.1 N·m (0.6 kgf·m, 4.5 lbf·ft) HANDLE HOLDER A HANDLE PIPE FRAME...
  • Page 74 62VL510X.book 6 ページ 2019年2月8日 金曜日 午後1時11分 FRAME/THROTTLE R.HANDLE GRIP INSTALLATION (U2ST/U2TT TYPES) Apply soapy water inside the handle grip [1]. Insert the handle pipe [2] to the handle grip [1] as shown. 25 mm (1.0 in) HANDLE HOLDER B, C INSTALLATION Install the handle holder B [1] and C [2] on the frame pipe [3] and loosely tighten the socket bolts [4].
  • Page 75 62VL510X.book 7 ページ 2019年2月8日 金曜日 午後1時11分 FRAME/THROTTLE Adjust the handle pipe [1] so that it makes a right angle with the center line of the frame pipe [2] by viewing the handle pipe from the gear case side. 90° After adjustment, tighten the socket bolt [3] to the specified torque.
  • Page 76 62VL510X.book 8 ページ 2019年2月8日 金曜日 午後1時11分 FRAME/THROTTLE WIRE HARNESS BAND INSTALLATION Set the wire harness band [1] at the respective positions shown. Make sure you install the wire harness band as shown. Failure to do so may cause the cable to be damaged during operation.
  • Page 77 62VL510X.book 1 ページ 2019年2月8日 金曜日 午後1時11分 INDEX dummytext INDEX AIR CLEANER ELEMENT CHECK/CLEANING ·············3-4 GRASS DEFLECTOR CHECK······································· 3-7 AIR CLEANER REMOVAL/INSTALLATION ···················5-2 HANDLE PIPE/THROTTLE LEVER BLADE CUTTER/GEAR CASE/DEFLECTOR REMOVAL/INSTALLATION·········································· 14-4 REMOVAL/INSTALLATION ··········································13-2 IDLE SPEED CHECK/ADJUSTMENT···························· 3-8 CABLE/HARNESS ROUTING ········································2-5 IGNITION COIL AIR GAP ADJUSTMENT······················ 6-4 CARBURETOR DISASSEMBLY/ASSEMBLY ················5-5 IGNITION COIL INSPECTION ·······································...
  • Page 78 9.3 kg 9.1 kg 9.3 kg 9.1 kg (20.1 lbs) (20.5 lbs) (20.1 lbs) (20.5 lbs) (20.1 lbs) *1: When engine rotation speed is 7,000 min (rpm). *2: Without cutting attachment, engine oil and fuel. Honda Motor Co., Ltd. 2019. 06...
  • Page 79 NOISE AND VIBRATION Model UMK450T Type UEBT Cutter Nylon Metal blade Sound pressure level at operator’s ears 99 dB(A) 94 dB(A) (ISO 22868: 2011) Sound pressure level at operator’s ears 1 dB(A) 1 dB(A) (ISO 22868: 2011) Uncertainty Measured sound power level...