Makita EK7650H, EK7651H dimensions Clutch, Ratchet

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Repair

[4]DISASSEMBLY/ASSEMBLY

[4]-3. Clutch, Ratchet

DISASSEMBLING

(1)Remove Cutting device. Refer to the clause of [4]-1.

(2)Loosen three M5x12 Hexalobular socket head bolts, then remove Clutch cover together with Starter assembly. (Fig. 16)

(3)Loosen three M5x16 Hexalobular socket head bolts with 1R290 and Cordless impact driver, and remove Ratchet complete. (Fig. 17)

(4)Remove M10-17 Hex lock nut by turning it counterclockwise by using Cordless impact driver with Socket bit.

(5)Turn the hexagonal portion of Clutch holder clockwise by using Cordless impact driver with Socket bit.

Clutch complete is removed.

Note: Clutch holder has a left hand thread.

(6)Remove Clutch drum assembly by hand. No tools are required. Remove Retaining ring R-35 from Clutch drum with 1R005. Press down Ball bearing 6003LLU in Clutch drum.

Fig. 16

Clutch cover

Starter assembly

U-shaped notch of Reel

M5x12 Hexalobular socket head bolt (3 pcs.)

Fig. 17

Fig. 18

Fig. 19

Ratchet complete

M10-17

Hexagonal

 

Hex lock

portion (M16-24)

 

nut

of Clutch holder

 

M5x16 Hexalobular

17mm flats width

24mm flats width

 

socket head bolt (3 pcs.)

Socket bit

 

Socket bit

ASSEMBLING

 

 

 

(1)

Put Spacer 17 and Clutch drum assembly to Crankshaft, then put

Fig. 20

 

 

the other Spacer 17 on Clutch drum assembly. (Fig. 20)

Crankshaft

 

(2)

Remove Spark plug and assemble 1R372 carefully to Cylinder

Spacer 17

 

 

block by hand to prevents Crankshaft from being rotated. (Fig. 21)

 

 

Clutch drum

 

(3)

Turn Flywheel slowly and carefully by hand until the top of

 

 

1R372 contacts Piston.

 

assembly

 

 

Note: Do not damage Piston.

 

Spacer 17

 

(4)

Turn the hexagonal portion of Clutch holder counterclockwise

 

 

 

with 1R223, 1R224 and 17mm flat width Socket in order to

 

 

 

tighten Clutch complete to the fastening torque 38N.m. (Fig. 20)

 

 

 

Note: • Do not use Cordless impact driver.

 

 

Clutch complete

 

• Do not turn the hexagonal portion with 1R372 taken

 

24mm flats width Socket

 

apart from Piston.

 

 

 

 

 

(Square drive: 12.7mm)

(5)

Assemble M10-17 Hex lock nut to Crankshaft by reversing

 

 

 

 

the disassembling procedure shown in Fig. 18.

 

1R224 1R223

 

(6)

Set Ratchet complete and three M5x16 Hexalobular socket head

 

 

bolts in place by reversing the disassembling procedure shown in

Fig. 21

 

 

Fig. 17.

 

Cylinder block

(7)

Assemble the rest in accordance with the clause of [4]-1.

 

 

 

 

 

1R372

 

 

 

 

 

Piston

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Contents Optional accessories SpecificationStandard equipment Repair Necessary Repairing ToolsLUBRICANT/ Adhesive Application EpairDisassembling Belt 5-800, Cutting deviceAssembling Starter assembly Clutch, Ratchet Flywheel, Ignition coil Adjustment the GAP Between Ignition Coil and FlywheelDisassembling Flywheel Complete Disassembling Ignition Coil Carburetor Adjustment of Carburetor After Replacement Engine block Throttle leverDISASSEMBLY/ASSEMBLY 4-7. Engine block Engine Arm has to be close to Repair Assembling Engine Block Oil ringLead unit DISASSEMBLY/ASSEMBLY 4-8. EngineIgnition system Tightening torque specificationsChecking Spark Plug

EK7650H, EK7651H specifications

The Makita EK7650H and EK7651H are robust and powerful cut-off saws designed for professional contractors and construction workers. These models are ideal for cutting through concrete, masonry, asphalt, and other tough materials with precision and efficiency. Their advanced engineering and innovative features set them apart in the competitive landscape of power tools.

One of the standout features of both models is the 4-stroke engine technology, which provides a significant reduction in emissions and noise compared to traditional 2-stroke engines. This makes them environmentally friendly while also allowing for longer operating times without the need for frequent fuel refills. The powerful 6.6 HP engine delivers exceptional cutting performance, enabling users to tackle even the most challenging jobs.

The EK7650H and EK7651H are equipped with a “Fast Start” technology that allows for easy starting, reducing the effort required to get the saw up and running. This is especially useful for users who need to work quickly and efficiently on-site. Additionally, the saws feature an automatic choke that enhances starting reliability in various weather conditions.

Comfort and usability are central to the design of these models. The dual anti-vibration technology minimizes vibrations during operation, significantly reducing user fatigue. The ergonomic handle provides a secure grip, allowing for greater control during cutting tasks. This is particularly beneficial for prolonged use in demanding work environments.

Another key characteristic of the Makita EK7650H and EK7651H is their versatility. They are designed to accommodate various blade sizes, which gives users flexibility in choosing the right blade for specific applications. The saws also feature an integrated dust management system that helps keep the work area clean, enhancing visibility and safety.

Both models come with an adjustable cutting depth feature, enabling users to achieve precise cuts for various materials. The easy-to-access air filter and fuel system ensure simple maintenance, extending the life of the saws.

In summary, the Makita EK7650H and EK7651H are powerful, efficient, and user-friendly cut-off saws that cater to the needs of professional users. With their advanced features, including a 4-stroke engine, ergonomic design, and versatility in blade sizes, these saws are indispensable tools for anyone looking to perform cutting tasks with precision and ease.
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