Tanaka TBC-420PF Service Manual

Grass trimmers / brush cutters

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Owner's manual (18 pages)

Illustrated parts manual (17 pages)

Owner's manual (26 pages)

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See also: Owner's Manual , Illustrated Parts Manual

• TROUBLE SHOOTING

• SERVICE / TORQUE LIMITS

• TECHNICAL DATA

1028 4th Street S.W. • Building B • Auburn, WA 98001 • PH: 253-333-1200 • F: 253-333-1212 • tanakapowerequipment.com

SERVICE MANUAL

GRASS TRIMMERS / BRUSH CUTTERS

Table of Contents

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Summary of Contents for Tanaka TBC-420PF

Page 1 SERVICE MANUAL GRASS TRIMMERS / BRUSH CUTTERS • TROUBLE SHOOTING • SERVICE / TORQUE LIMITS • TECHNICAL DATA 1028 4th Street S.W. • Building B • Auburn, WA 98001 • PH: 253-333-1200 • F: 253-333-1212 • tanakapowerequipment.com...
Page 2: Special Tools
Tools, instruments and parts needed for the job should be gathered before work is started. Interrupting a job to locate tools or parts is a needless delay. Special tools required for a job are listed in this manual. WWW.TANAKAPOWEREQUIPMENT.COM CUSTSVC@NIKKO-TANAKA-USA.COM...
Page 3: Safety Precautions
When unit is tipped to perform service procedures in this Allow engine to cool before storing in any enclosure. manual, remove fuel so that no spillage wi l occur. WWW.TANAKAPOWEREQUIPMENT.COM CUSTSVC@NIKKO-TANAKA-USA.COM...
Page 4: Table Of Contents
6-1 Recoil starter system 6-2 Checking air gap 6-3 Carburetor adjustment and maintenance 6-4 Disassembling and assembling engine Drive side 7-1 Removing and assembling clutch drum 7-2 Removing drive shaft 7-3 Disassembling gear case 7-4 Assembling gear case Trouble Shooting WWW.TANAKAPOWEREQUIPMENT.COM CUSTSVC@NIKKO-TANAKA-USA.COM...
Page 5 1. Special Tool List Ref.# Description Parts# TBC-230/2501 TBC-290 TBC-340 TBC-4200DX TBC-4200D TBC-550DX TBC-550/600 TBC-250PF/260PF TBC-340PF TBC-4200DLV TBC-270 TBC-420PF TBC-430PFLV Fly-wheel remover 006-29326-00 Center bolt 007-29326-00 Step bolt 6 x 42 008-29326-00 Piston pin remover 009-29323-50 Piston pin remover 009-29326-00 Pinion remover 016-29338-00...
Page 6: Technical Data
Air gap (mm) Ignition timing ( K ) Spark plug(maker) CJ-6Y(CHPN) or BPM6A (NGK) or RCY8Y(CHPN) RCY8Y(CHPN) RCJ-6Y(CHPN) RCY8Y(CHPN) Gap (mm) Clutch drum Diameter (mm) Gear Ratio 1.286 : 1 1.25 : 1 1.28 : 1 1.28 : 1 WWW.TANAKAPOWEREQUIPMENT.COM CUSTSVC@NIKKO-TANAKA-USA.COM...
Page 7 2. Technical Data Model TBC-420PF TBC-4200D TBC-550 series TBC-600 430PF series series Displacement (cc) 39.8 39.8 46.5 46.5 Bore x Stroke (mm) 39.8 x 32 39.8 x 32 43 x 32 43 x 32 Compression ratio 7.2 : 1 6.95:1 7.0 : 1...
Page 8: Service Limits
8.96 0.50 0.10 11.90 11.90 55.00 11.95 TBC-340 series 37.03 36.80 9.05 8.96 0.50 0.10 11.90 11.90 79.00 11.95 TBC-420PF 39.84 39.60 10.05 9.96 0.50 0.10 14.90 14.90 79.00 14.95 TBC-430PF series TBC-4200 series 39.84 39.60 10.05 9.96 0.50 0.10 14.90...
Page 9: Torque Limits
M4 Hex hole bolt 25 - 30 21.7 - 26.0 M5 Hex hole bolt 45 - 50 39.1 - 43.4 M6 Hex hole bolt 80 - 100 69.4 - 86.8 M8 Bolt 200 - 250 173.4 - 216 8 WWW.TANAKAPOWEREQUIPMENT.COM CUSTSVC@NIKKO-TANAKA-USA.COM...
Page 10 Sealing is essential. Fig. 1 WWW.TANAKAPOWEREQUIPMENT.COM CUSTSVC@NIKKO-TANAKA-USA.COM...
Page 11 WWW.TANAKAPOWEREQUIPMENT.COM CUSTSVC@NIKKO-TANAKA-USA.COM...
Page 12 WWW.TANAKAPOWEREQUIPMENT.COM CUSTSVC@NIKKO-TANAKA-USA.COM...
Page 13 WWW.TANAKAPOWEREQUIPMENT.COM CUSTSVC@NIKKO-TANAKA-USA.COM...
Page 14 5) When assembling the recoil spring to the recoil body, insert hook of recoil spring into the groove within the recoil starter body. Fig. 17 NOTE: Be sure to install recoil spring so shape spring winding is clockwise from the center to out. WWW.TANAKAPOWEREQUIPMENT.COM CUSTSVC@NIKKO-TANAKA-USA.COM...
Page 15 Needle WWW.TANAKAPOWEREQUIPMENT.COM CUSTSVC@NIKKO-TANAKA-USA.COM...
Page 16: Cylinder
Remove magneto rotor tightening nut and remove magneto rotor from the crankshaft by using the following special tools. Fig 24 1. Fly-Wheel Remover 2. Center Bolt 3. Step Bolts or Remover Bolts 4. Handle Bar 8 X 120 (See section 1. Special Tools List) WWW.TANAKAPOWEREQUIPMENT.COM CUSTSVC@NIKKO-TANAKA-USA.COM...
Page 17: Piston
Fig. 28 CHECK: 1. For any damage to the ball bearing and oil seal. 2. Rod bearing for damage and clearance. NOTE: Use a new crankcase gasket and cut off excess gasket material when assembling. WWW.TANAKAPOWEREQUIPMENT.COM CUSTSVC@NIKKO-TANAKA-USA.COM...
Page 18 WWW.TANAKAPOWEREQUIPMENT.COM CUSTSVC@NIKKO-TANAKA-USA.COM...
Page 19 8) If bearing where it is installed in the bottom of gear case needs to be replaced, heat the bottom of gear case up to 100 degrees to 150 degrees and then tap gear case to wooden base so that bearing will come off. Fig.36 WWW.TANAKAPOWEREQUIPMENT.COM CUSTSVC@NIKKO-TANAKA-USA.COM...
Page 20 NOTE: When installing the stop ring, always use a new stop ring. WWW.TANAKAPOWEREQUIPMENT.COM CUSTSVC@NIKKO-TANAKA-USA.COM...
Page 21: Spark Plug
Incorrect carburetor valve hinge height adjustment Bad fuel-Use proper/fresh fuel Engine ooded-Check carburetor Fuel and spark Mu er gasket partially covering exhaust port reach cylinder of cylinder Excess carbon in mu er/spark arrestor Poor cylinder pressure Worn or damaged internal parts WWW.TANAKAPOWEREQUIPMENT.COM CUSTSVC@NIKKO-TANAKA-USA.COM...
Page 22 Clutch shoes worn out Check clutch Cutting attachment Shoes sticking on clutch step bolts doesn't turn Clutch drum broken or worn out Check gear case Broken pinion/gear Broken gear shaft Check drive shaft Broken drive shaft or rounded o at spline WWW.TANAKAPOWEREQUIPMENT.COM CUSTSVC@NIKKO-TANAKA-USA.COM...

This manual is also suitable for:

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