Makita EBH252U, Technical Information

Page 1: ...H Dimensions mm Width W Height H Length L 1 770 69 3 4 490 19 1 4 265 10 3 8 EBH252U EBH253U EBH252L EBH253L EBH252U EBH253U EBH252L EBH253L L W H EBH252U EBH252L EBH253U EBH253L Petrol Brushcutter Th...

Page 2: ...assembling 18 6 6 2 Assembling 18 6 7 Clutch case 19 6 7 1 Disassembling 19 6 7 2 Assembling 20 6 8 Carburetor 21 6 8 1 Disassembling 21 6 8 2 Assembling 22 6 9 Check of Spark plug 22 6 10 Ignition co...

Page 3: ...and how the parts are assembled and what are the parts It is also recommended to have boxes ready to keep disassembled parts by group Handle the disassembled parts carefully Clean and wash them prope...

Page 4: ...g Ball bearings 1R291 Retaining ring S and R pliers removing Retaining ring S 12 1R311 Retaining ring pliers with Long bent nails removing Retaining ring 1R316 Wrench for bearing retainer disassemblin...

Page 5: ...on ring set Crankshaft assembly Sealing lips of Oil seals Rod portions of Intake valve Exhaust valve in Cylinder Lubricant Amount Makita grease FA No 2 a little 4 stroke engine oil a little Fig 5 2 1...

Page 6: ...d then apply ThreeBond 1215 or 1216 as shown below 5 4 M5x40 Hex socket head bolts for securing Muffler Once M5x40 Hex socket head bolts are removed or loosened apply Loctite 271 or 272 on them Fig 5...

Page 7: ...the component of Control cable 3 Remove the cylindrical end of Control cable 2 Push to open the throttle portion of arburetor by a finger Fig 6 1 1 4 Clutch case 5 Loosen three Hex socket head bolts t...

Page 8: ...e disassembling procedure Fig 6 1 2 1 2 Route Control cable over the shaft as shown below Adjust screw of Control cable Cylindrical end of Control cable 4 Insert Adjust screw all the way 3 Bundle Lead...

Page 9: ...tector cover and M5x14 Hex socket head bolt then remove Protector cover from Shaft pipe complete Protector cover Shaft pipe complete Protector M6x30 Hex socket head bolt 2 pcs M5x14 Hex socket head bo...

Page 10: ...28 with 1R311 Ball bearing 6001LLU Cutter shaft set 6 Remove Cutter shaft section by tapping Gear case assembly Note If Cutter shaft section is hard to be removed warm the rear side with a drier Fig...

Page 11: ...1 1 1 Remove two M6x25 Hex socket head bolts then remove Pipe clamp from Pipe shaft Pipe shaft Pipe clamp M6x25 Hex socket head bolt 2 pcs Fig 6 3 2 1 2 When the gear room is cleaned up apply 8g of Ma...

Page 12: ...margin of 25 30mm 3 Assemble Torsion spring 7 to Lock off lever 9 Assemble Switch lever to Switch cover Hang the spring on the rib 6 Assemble Torsion spring 11 to Throttle lever Fig 6 4 1 2 2 10 To pr...

Page 13: ...18 Tapping screws then remove Lever case R Lever case R Note Do not loosen Hex socket head bolts Fig 6 4 2 1 3 3 Remove Control lever assembly as shown below Control cable Lock lever Torsion spring 7...

Page 14: ...on spring 11 to Throttle lever 9 Put the cable nipple of Control cable as shown below 10 Hang the tail of Torsion spring 11 5 Put the end of Control cable as shown below 6 Put Torsion spring 7 of Lock...

Page 15: ...5 5 235 5 85 640 5 435 5 235 5 170 320 640 5 230 EBH253U EBH252U EBH252L EBH253L 100 Control lever assembly Note The hole of Shaft pipe complete must be faced to upward For all models Hanger Cushion M...

Page 16: ...e Clutch section be sure to remove Recoil starter set to prevent it from damage Recoil starter 9 Loosen three M5x16 hex socket head bolts then remove Clutch case Clutch case Fig 6 5 1 1 7 10 Remove M6...

Page 17: ...N m with 1R219 1R220 and Socket bit 13 1R219 1R220 Fasten 1R372 Socket bit 13 Fig 6 5 2 2 4 Thrust Stand in the direction of the arrow and assemble it to Clutch case with two M5x14 Pan head screws The...

Page 18: ...place See 3 4 5 2 Assembling Fig 6 6 1 2 1R364 4 Remove Flywheel with 1R364 Flywheel 3 The center hole is made by tightening M6x16 Hex head bolt Fig 6 6 2 1 2 Assemble Flywheel to Crankshaft assembly...

Page 19: ...Pipe damper 1 together with Pipe bracket 1 and separate each other Pipe damper 1 Pipe bracket 1 5 Set Clutch case on two 1R258 and press down Clutch drum with an arbor press Note Be careful not to pu...

Page 20: ...ween Clutch drum and Ball bearing 6001LLU Clutch case Ball bearing 6001LLU Clutch drum 4 Spacer is directional Fig 6 7 2 2 Clutch case Note Pipe bracket should be removed in advance 5 Press fit Clutch...

Page 21: ...2 Jet Pump gasket Pump diaphragm Metering diaphragm gasket Metering diaphragm Air purge body Primer pump Primer pump cover 3x24 Tapping screw 4 pcs Inlet screen Pump body Conical compression spring 5...

Page 22: ...of 1R366 to the gap of Spark plug and then adjust the gap carefully to 0 7 0 8mm Fig 6 8 2 2 3 Connect Breather pipe to Rocker cover complete Connect Pipe to Cylinder block assembly Fig 6 8 2 1 2 Pas...

Page 23: ...il together with Plug cap spring Plug cap Plug cap spring High voltage cable Lubricant Plug cap Fig 6 10 2 1 1 Temporarily assemble Ignition coil to Cylinder block assembly with two M4x20 Hex socket h...

Page 24: ...of 1R181 Cylinder fin Cable from Ignition coil Note Some products have this projection on the top Spark window Contents of 1R181 Note When you find it difficult to see the sparks in Spark window adjus...

Page 25: ...coil may break Spark window 3 Start Engine and check that the sparks are found out continuously during idling after that while accelerating the rpm of engine to the maximum gradually Note Some models...

Page 26: ...into the groove of Reel and turn Reel clockwise to eliminate the reaction force Reel Starter rope Starter knob Fig 6 14 1 1 1 4 Remove M5x12 Tapping screw and then remove Swing arm and Reel from Start...

Page 27: ...Recoil starter set Fig 6 14 1 2 1 4 Remove M5x12 Tapping screw and then remove Reel from Starter case Reel Fig 6 14 1 2 2 5 Untie the knot of the rope and remove the rope from Starter knob Reel Dampe...

Page 28: ...ok Fig 6 14 2 1 2 2 Fit the other end of Spiral spring into the hook on the center of Starter case Fig 6 14 2 1 3 3 Recover Recoil starter spring force by reversing the disassembly procedure shown in...

Page 29: ...r case then set Spiral spring into the round wire 2 Set Spiral spring into Starter case while releasing Spiral spring from the wire Note Apply Makita grease FANo 2 to the spring in advance Refer to Fi...

Page 30: ...lywheel until Piston touches 1R372 and then fix Pulley with 4 7 N m with a torque wrench 1R183 1R219 and 1R220 1R372 1R219 1R220 1R183 Clockwise Cylinder Fig 6 15 1 1 Remove Pulley by turning it count...

Page 31: ...es 1R372 and then turn Pulley counterclockwise with 1R316 to remove 1R316 Pulley Counterclockwise Pulley Fig 6 16 2 1 Insert 1R372 into Cylinder then gently turn Flywheel until Piston touches 1R372 an...

Page 32: ...ful of the orientation Clamp M5x18 Hex socket head bolt 2 pcs Adjust screw The component of Control cable O ring 10 Insulator Fig 6 17 1 2 3 Remove two M5x40 Hex socket head bolts and Exhaust muffler...

Page 33: ...lete Rocker cover gasket Note The orientation of the gasket does not matter Fig 6 17 1 6 7 Pull out Pin 5 with long nose pliers Remove two Rocker arm assemblies Pin 5 Rocker arm assembly 2 pcs First p...

Page 34: ...Hex socket head bolts that fasten Crankcase to Cylinder block Fig 6 17 1 11 12 Disassemble Cylinder block assembly Cylinder block and Crankcase Pry it off with a slotted screwdriver Cylinder block Th...

Page 35: ...lastic hammer Spring retainer 2 pcs can be removed by pushing and sliding Compression spring 9 2 pcs Intake valve I mark Exhaust valve E mark Cylinder block Note The bottom diameter of Intake valve is...

Page 36: ...finally install Piston ring top 34 It consists of Piston ring top 34 Piston ring second 34 and Piston ring 34 Note All gaps must not be aligned vertically Piston ring top 34 Piston ring second 34 Note...

Page 37: ...n section in place apply lubricants to the specific portions 4 cycle engine oil Makita grease FA No 2 Fig 6 19 1 4 6 Set Flywheel in place temporarily Turn it by hand to align the mark with that of Ig...

Page 38: ...gine oil to the holes for Pin 5 Fig 6 19 1 8 10 Set Lead valve in place Oil gauge Fig 6 19 1 6 8 Assemble Cam gear cover and Cam gear cover gasket to Cylinder block with three M5x14 Hex socket head bo...

Page 39: ...run you check the engine remains warm If yes measure the rpm with 1R070 as follows Idling rpm must be 3 000 min 1 by turning Idle adjusting screw Engine without Shaft and blade is allowed to do the c...

Page 40: ...M5x14 Hex socket head bolt 4 5 6 5 3 Rocker arm assembly Adjust screw M5 Hex nut 5 0 6 5 2 Rocker cover complete Cylinder block assembly M5x16 Hex socket head bolt with WR 4 5 6 5 3 Spark plug Cylinde...