Shindaiwa T2510 Service Manual
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Shindaiwa T2510 Service Manual

Trimmer/brushcutter with c4 technology four-stroke engine
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See also: Operator's Manual , Owner's/operator's Manual
$7.50
SERVICE
MANUAL
T2500/T2510/T3410
Trimmer/Brushcutter
4
™
with C
Four-Stroke Engine
Edition 2 • September 2007
Technology

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Sylvester
May 9, 2025

Starter rope hard to pull

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1 comments:
Mr. Anderson
May 19, 2025

The starter rope is hard to pull on a Shindaiwa T2510 because the decompression valve may not be working properly. This can increase engine compression, making the rope harder to pull.

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Summary of Contents for Shindaiwa T2510

  • Page 1 $7.50 SERVICE MANUAL T2500/T2510/T3410 Trimmer/Brushcutter ™ with C Technology Four-Stroke Engine Edition 2 • September 2007...

  • Page 2: Table Of Contents

    Service Manual Shindaiwa T2500 Trimmer/Brushcutter 4™ With C Technology Four-Stroke Engine Edition 2 • September 2007 Contents Section Page 1 Engine Design & Theory......3 2 Unique Components ....... 5 3 Getting Started ........7 4 Valve Clearance Adjustment ....8 5 Pushrods/Followers/Cam .....

  • Page 3: Engine Design & Theory

    Because of its many two-stroke similarities, many of the C4's service functions are the same as Shindaiwa two-strokes. And, wherever possible, Shindaiwa used the same components and/or construction methods found on Shindaiwa two-strokes. Thus, for many service functions, such as carburetor...

  • Page 4: Unique Components

    2 Unique Components Section A. Crankcase: Parts That Distinguish The T2500 has a horizontally-split crankcase with upper half also comprising cylinder. The T2500 Bottom half contains boost port, reed valve, Powerhead and boost chamber cover. B. Cylinder: In addition to incorporating the upper crankcase half, the cylinder also has compartments for cam/gear assembly and overhead valve components (rocker arms,...
  • Page 5 Unique Components Section C. Crankshaft/Connecting Rod, Piston: Parts That Distinguish Forged three-piece crankshaft and connecting rod resemble two-stroke assemblies, but with The T2500 these key differences: (1) A metal timing gear Powerhead is pressed onto the recoil side, between main bearing and shaft end, and (2) the piston rings are not pinned.

  • Page 6: Getting Started

    D. Special Tools Some of the repair procedures described in this manual involve special Shindaiwa tools. These tools are identified by name and part number in the step-by-step explanations. A complete listing of all the special tools required for this product can be found in the "Special Tools"...

  • Page 7: Valve Clearance Adjustment

    Valve Clearance Adjustment Section A. When To Adjust Tools/Specs Valve clearance should be checked and adjusted after 135 hours of operation, or as a possible remedy for low compression. Normal compression range for this engine is 90-125 PSI. (See master repair manual for test procedure and other causes of low compression.) B.

  • Page 8: Valve Clearance Adjustment

    4 Valve Clearance Adjustment Section Pushrod Inspection (cont.) Inspecting Pushrod & Check for straightness by rolling pushrods across a flat surface, such as glass plate. If Cam Lobe any wobble is detected, replace. Check overall length with caliper or micrometer. Length should be 2.453" (62.3 mm).
  • Page 9 Valve Clearance Adjustment Section I. Adjustment Procedure Adjustment Procedure STEP 1. Remove cylinder cover, rocker arm cover, and set piston at TDC-compression (see point "H" above). STEP 2. (Optional.) To lock crankshaft/cam position at TDC-compression stroke, activate timing screw (see pg. 12). STEP 3.

  • Page 10: Pushrods/Followers/Cam

    5 Servicing Pushrods/Followers/Cam Section A. Remove Pushrods Removing & Installing STEP 1. Remove rocker arm cover. Pushrods, STEP 2. Rotate crankshaft so that piston is at Rocker Arms top-dead-center (TDC) of compression stroke (cam lobe facing down). & Followers NOTE: To identify TDC-compression vs.
  • Page 11 Servicing Pushrods/Followers/Cam Servicing Pushrods/Followers/Cam Section Section F. Install Cam Followers Reverse steps above to in stall followers. IMPORTANT! Install left-hand (intake valve) follower first. G. Remove Cam Gear Removing & Installing STEP 1. Remove pushrods and followers. Cam Gear STEP 2. Remove cam axle pin. STEP 3.
  • Page 12 6 Reed Valve Inspection/Replacement Section A. Reed Valve Locations Inspecting & Replacing The T2500 engine relies on two steel reed valves as a key element of its C4 technology. Reed Valves The intake reed valve is mounted on the back (engine) side of the insulator block.

  • Page 13: Crankcase & Intake Sealing

    Crankcase & Intake Sealing Section A. C4 Crankcase Principles Crankcase Sealing Shindaiwa C4 engine technology relies on a sealed crankcase, just like a two-stroke. That Principles means air leaks can lead to serious operational problems, just like they do in two-strokes.
  • Page 14 7 Crankcase & Intake Sealing Section When pressure testing, always use a new Testing For plug, properly torqued. Air Leaks STEP 9. To check crankcase seals and gasket areas for leakage, maintain pressure in crankcase and spray soapy water on suspect surfaces.

  • Page 15: Inspecting Impulse Passage

    Inspecting Impulse Passage Section A. Impulse Function Critical Checking Impulse Like a two-stroke, the T2500 C4 engine relies on crankcase impulses (positive/negative Passage pressure) to operate the carburetor's fuel pump diaphragm. Impulses are delivered to the carburetor through a passage in the insulator block/reed valve component.
  • Page 16 9 T2500/T2510 General Specifications Section COMPONENT: SPECIFICATION: ENGINE T2500/T2510 Displacement 24.5 cc / 1.48 cu. in. Bore/stroke 34 mm X 27 mm Horsepower 1.1 HP RPM @ maximum HP 8000 HP Maximum no-load RPM 10,500 RPM Weight (less accessories) 11.3 lb. / 5.1kg Specific output (cc per hp) 22.3 cc per HP...

  • Page 17: General Specifications

    T2500 General Specifications Section RECOIL Housing material Nylon Attachment points Cord diameter 3 mm Cord length 700 mm / 27.5 in. IGNITION Ignition t ype STCI (2510: PCI with rev limiter) Components Minimum output voltage 18 kV Coil wire Replaceable: 6 mm x 75 mm Coil/flywheel air gap 0.012"-0.014"...
  • Page 18 9 T3410 General Specifications Section COMPONENT: SPECIFICATION: ENGINE T3410 Displacement 34cc/ 2.1 cu. in. Bore/stroke 38 mm X 30 mm Horsepower 1.4 HP RPM @ maximum HP 8000 HP Maximum no-load RPM 10,500 RPM Weight (less accessories) 12.9 lb. / 5.8 kg Specific output (cc per hp) 24.3 cc per HP Idle RPM...
  • Page 19 T3410 General Specifications Section RECOIL Housing material Nylon Attachment points Cord diameter 3 mm Cord length 700 mm / 27.5 in. IGNITION Ignition t ype STCI (2510: PCI with rev limiter) Components Minimum output voltage 18 kV Coil wire Replaceable: 6 mm x 75 mm Coil/flywheel air gap 0.012"-0.014"...
  • Page 20 10 T2500/T2510 Tolerances & Wear Limits Section SPECIFICATION: STANDARD DIMENSION: LIMIT: UNIT OF MEASUREMENT: inches inches Spark plug gap; .026" .023~.028” 0.6~0.7 Coil/flywheel gap: .014" .012~.016” 0.3~0.4 Valve adjustment (cold): Intake: .003" 0.08 0.002" 0.008 Exhaust: .004" 0.10 0.002" 0.008 Piston diameter: 1.334"...

  • Page 21: Tolerances & Wear Limits

    T2500/T2510 Tolerances & Wear Limits SPECIFICATION: STANDARD DIMENSION: LIMIT: inches inches Follower bore diameter: .196~.197" 5.005~5.025 0.198" 5.05 (+.025) Cam cover shaft bore diameter .196~.197" 5.005~5.025 0.199" 5.057 (+.032) Cylinder Block: Cam gear shaft bore diameter: .1971~.1976" 5.000~5.012 0.199" 5.05 (+.038 Follower shaft bore diameter: .1966~.1971"...
  • Page 22 10 T3410 Tolerances & Wear Limits Section SPECIFICATION: STANDARD DIMENSION: LIMIT: UNIT OF MEASUREMENT: inches inches Spark plug gap; .026" .023~.028” .06~.07 Coil/flywheel gap: .014" .012~016” .3~.4 Valve adjustment (cold): Intake: .003" 0.08 0.002" 0.008 Exhaust: .004" 0.10 0.002" 0.008 Piston diameter: 1.492"...
  • Page 23 T3410 Tolerances & Wear Limits Section SPECIFICATION: STANDARD DIMENSION: LIMIT: inches inches Follower bore diameter: .196~.197" 5.005~5.025 0.198" 5.05 (+.025) Cam cover shaft bore diameter .196~.197" 5.005~5.025 0.199" 5.057 (+.032) Cylinder Block: Cam gear shaft bore diameter: .1971~.1976" 5.000~5.012 0.199" 5.05 (+.038 Follower shaft bore diameter: .1966~.1971"...
  • Page 24 11 T2500/2510/3410 Torque Values Section PART (THREADS INTO) PART NO. DESCRIPTION DIMENSION QTY. IN/LB (KGF.CM) Crankcase (cylinder) 01020-05160 Allen screw M5X16 50~70 60-80 Intake reed valve (cylinder) 11206-05220 Phillips screw M5X22 25-35 30-40 Muffler (cylinder) 62901-15310 Allen screw M5X25 60~80 70-90 Muffler (crankcase) 01020-05160...

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T2500T3410

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