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Makita EBH252U Technical Information
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Makita EBH252U Technical Information

Petrol brushcutter
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T
ECHNICAL INFORMATION
Model No.
Description
C
ONCEPT AND MAIN APPLICATIONS
These four models are 4-stroke petrol brushcutters developed
in compliance with EU Stage 2 exhaust emission regulations.
Their main features are:
• 4-stroke engine for low noise and clean exhaust emission
• Ergonomic handle for higher maneuverability
See "Specification" below for the specification differences
between the four models.
Note: These four products are not in compliance with
the regulations of San Dimas.
S
pecification
Specification
Type
Engine
Displacement: mL
Fuel
: min -ı = rpm
No load speed*
1
Engine oil
Starting system
Fuel tank capacity: L
Standard cutting tool
Handle style
Rapid start
Waist cushion
Net weight*
: kg (lbs)
2
*1 No load speed of the engine when installed on the brushcutter
*2 Dry weight, without universal guard, cutting tool and shoulder harness
S
tandard equipment
4-tooth star blade 230mm (9") (for EBH252U, EBH253U)
Nylon cutting head (for EBH252L, EBH253L)
Universal guard (=Protector)
Shoulder harness with double shoulder straps (for EBH252U, EBH253U)
Shoulder harness with single shoulder strap (for EBH252L, EBH253L)
Socket wrench
Hex wrench (for M5)
Hex wrench (for M6)
Wire clamp (for tying cables) (for EBH252U)
Oil bottle
Note: The standard equipment for the tool shown above may vary by country.
EBH252U, EBH252L
EBH253U, EBH253L
Petrol Brushcutter
Model
EBH252U
Straight gasoline (lead-free gasoline for automobiles)
10,000
diameter
230mm (9")
4-tooth star blade
Bike handle
5.7 (12.6)
EBH252U
EBH253U
EBH252L
4-stroke
24.5
9,000
SAE10W-30 oil
in the Class SF or higher of API Classification
Diaphragm
Recoil starter, with mechanical decompression
0.5
230mm (9")
Nylon cutting head
4-tooth star blade
Loop handle
No
No
5.2 (11.5)
1 / 40
OFFICIAL USE
for ASC & Sales Shop
March 2016
W
H
L
EBH252L
EBH253L
Dimensions: mm (")
EBH252U
EBH253U
Length (L)
1,770 (69-3/4)
Width (W)
620 (24-3/8)
Height (H)
490 (19-1/4) 265 (10-3/8)
EBH253L
EBH253U
10,000
9,000
diameter
Nylon cutting head
Bike handle
Loop handle
Yes
Yes
No
5.9 (13.0)
5.3 (11.7)
O
ptional accessories
Blades, Nylon cutting head
H
W
L
EBH252L
EBH253L
330 (13)

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Summary of Contents for Makita EBH252U

  • Page 1 4-tooth star blade 230mm (9") (for EBH252U, EBH253U) Nylon cutting head (for EBH252L, EBH253L) Universal guard (=Protector) Shoulder harness with double shoulder straps (for EBH252U, EBH253U) Shoulder harness with single shoulder strap (for EBH252L, EBH253L) Socket wrench Hex wrench (for M5)

  • Page 2: Table Of Contents

    Gear case assembly ................................10 6-3-1 Disassembling ................................10 6-3-2 Assembling ................................11 Control lever assembly ............................... 11 6-4-1 For EBH252U and EBH253U........................... 11 6-4-2 For EBH252L and EBH253L ............................ 13 Clutch ....................................16 6-5-1 Disassembling ................................16 6-5-2 Assembling ................................17 Flywheel .....................................

  • Page 3: Caution

    CAUTION Repair the machine in accordance with “Instruction manual” or “Safety instructions. Follow the instructions described below in advance before repairing: Wear gloves. · Remove the cutting tool from the unit, and if it is a saw blade, attach the blade cover to the blade. ·...

  • Page 4: Necessary Repairing Tools

    Crankshaft lock bolt M10 locking Piston LUBRICANT AND ADHESIVE APPLICATION Apply the following lubricants and adhesives. Recoil starter, Gear case assembly, Shaft Lubricant Amount Makita grease FA No.2 a little Fig. 5-1-1 Gear case Reel assembly Starter case Spiral spring...

  • Page 5: Cylinder Block Section

    Cylinder block section Lubricant Amount Makita grease FA No.2 a little 4-stroke engine oil a little Fig. 5-2-1 Outer circumference of Piston ring set Oil seal 12 Needle bearing Oil seal 10 Crankshaft assembly Cam gear section Sealing lips of...

  • Page 6: Cylinder Block Assembly

    Cylinder block assembly Use parts cleaner or the like to remove grease from the mating surface of Crankcase to Cylinder block, and then apply ThreeBond 1215 or 1216 as shown below. Fig. 5-3-1 Oil route Note: Liquid gasket should not be come into here. Surface where ThreeBond 1215 or Crankcase...

  • Page 7: Repair

    REPAIR Engine and Shaft 6-1-1 Disassembling Fig. 6-1-1-2 Fig. 6-1-1-3 Fig. 6-1-1-1 [1] Remove Air cleaner cover. [3] Remove the cylindrical end of Control cable. [4] Loosen Adjust screw* and then remove Control cable. [2] Push to open the throttle portion *the component of Control cable of arburetor by a finger.

  • Page 8: Assembling

    6-1-2 Assembling [1] Assemble by reversing the disassembling procedure. Fig. 6-1-2-1 [2] Route Control cable over the shaft as shown below. Cylindrical end of Control cable Control cable Adjust screw of Control cable [4] Insert Adjust screw all the way. [3] Bundle Lead units with Clamp.

  • Page 9: Shaft Pipe Complete

    Shaft pipe complete 6-2-1 Disassembling Fig. 6-2-1-1 Fig. 6-2-1-2 [1] Loosen two M6x30 Hex socket head bolts, [2] Expand the space between the side wall of Protector cover and then remove Protector. M5x14 Hex socket head bolt, then remove Protector cover from Shaft pipe complete.

  • Page 10: Gear Case Assembly

    Gear case assembly 6-3-1 Disassembling [1] Remove Gear case assembly. (See 6-2-1 Disassembling.) Fig. 6-3-1-1 [3] Remove Retaining ring R-24 with 1R311. [2] Remove M8x10 +Hex bolt with R. Fig. 6-3-1-2 Fig. 6-3-1-3 [4] Remove Spiral bevel Note: If Cutter shaft section is hard to be removed, gear 14 section by warm the rear side with a drier.
  • Page 11 Note: First assemble Cutter shaft, then assemble Spiral bevel gear 14. Fig. 6-3-2-1 [2] When the gear room is cleaned up, apply 8g of Makita grease FA No.2 in either of the following ways: during assembling: apply grease into Gear case assembly ·...
  • Page 12 6-4-1-2 Assembling [3] Assemble Torsion spring 7 to Lock off lever. [1] Assemble by reversing the disassembling procedure. Fig. 6-4-1-2-1 [2] Assemble Lock-off lever to Lever case L. [4] Set [9] Assemble Switch lever to Corrugate Switch cover. tube in the unit.

  • Page 13: For Ebh252L And Ebh253L

    6-4-2 For EBH252L and EBH253L 6-4-2-1 Disassembling Fig. 6-4-2-1-1 Fig. 6-4-2-1-2 [1] Remove four M5x30 Pan [2] Loosen four 4x18 Tapping screws, then remove Lever head screw, then case R. disassemble Loop handle. Loop handle 24 Blade Lever case R side Shaft pipe complete Note: Do not loosen Hex...
  • Page 14 L. Leaf spring Switch lever [8] Fix Torsion [9] Put the cable nipple of [10] Hang the tail of spring 11 to Control cable as shown Torsion spring Throttle lever. below. Apply Makita grease FA No.2. 14 / 40...
  • Page 15 Fig. 6-4-2-2-6 [12] Each part of Pipe shaft and the position where each label is attached are as follows: EBH253U 10±2 10±2 Pipe holder Hanger 235±5 Makita’s logo Pipe shaft Cushion Serial Caution label number label label 435±5 640±5 10±2 10±2...

  • Page 16: Clutch

    Clutch 6-5-1 Disassembling [1] Separate Shaft section from Engine section. (See 6-1 Engine and Shaft.) Fig. 6-5-1-1 Fig. 6-5-1-1-2 Fig. 6-5-1-1-3 [2] Remove two 5x12 Pan [4] Remove Cylinder cover. [5] Remove two M4x25 Pan head head screws. screws. Note: Tank guard, Starter and Spacer are jointly fastened, and make sure not to lose Spacer.

  • Page 17: Assembling

    6-5-2 Assembling [1] Assemble by reversing the disassembling procedure. Fig. 6-5-2-1 [2] Assemble two Washers 6, two Clutch shoes, Tension spring 7, two Washers 8 and two M6x25 Shoulder hex bolts to Flywheel. Washer 8 (2 pcs.) Note: Face each curve [3] Screw 1R372 into the threaded hole for Spark toward Clutch plug.

  • Page 18: Flywheel

    Flywheel 6-6-1 Disassembling [1] Remove Clutch. (See 6-5-1 Disassembling.) Fig. 6-6-1-1 Fig. 6-6-1-2 [2] Remove M6x16 Hex head bolt (right hand thread) with Socket bit 10. [4] Remove Flywheel with 1R364. 1R364 Socket bit 10 [3] The center hole is Flywheel M6x16 Hex made by tightening...

  • Page 19: Clutch Case

    Clutch case 6-7-1 Disassembling [1] Remove Clutch case. (See 6-5-1 Disassembling.) Fig. 6-7-1-1 Fig. 6-7-1-2 [6] Remove Retaining ring S-12 Pipe bracket 2 with 1R291. Clutch case 1R291 [2] Pull out Pipe bracket 1R238 2 together with Pipe damper 2 and Pipe damper 2 Retaining ring S-12 separate each other.
  • Page 20 6-7-2 Assembling [1] Assemble by reversing the disassembling procedure. Fig. 6-7-2-1 Fig. 6-7-2-2 [2] Assemble Clutch drum. [5] Press-fit Clutch case Clutch drum. [4] Spacer is Ball bearing 6001LLU directional. Clutch drum Clutch case Note: Pipe bracket should [3] Be sure to fix retaining be removed in ring R-32 between advance.

  • Page 21: Carburetor

    Carburetor 6-8-1 Disassembling [2] Pull out Fuel hose. Fig. 6-8-1-1 Fig. 6-8-1-3 [5] Component of Carburetor Air cleaner Air cleaner cover element M3x8 Pan head screw (2 pcs.) Swivel Washer Cleaner plate Stop ring E-3 assembly O ring 2 Conical compression spring [1] Loosen two M5x68 Pan head Pump gasket...
  • Page 22 6-8-2 Assembling [1] Assemble by reversing the Disassembling procedure. Fig. 6-8-2-1 Fig. 6-8-2-2 [2] Pass Tube complete through Clamp, and then [3] Connect Breather pipe to Rocker cover complete. connect them to Carburetor. Connect Pipe to Cylinder block assembly. (Also, refer to enlarged view on the connection of Tube complete and Carburetor in Fig.

  • Page 23: Assembling

    6-10-2 Assembling Fig. 6-10-2-1 [1] Temporarily assemble Ignition coil to Cylinder block assembly with two M4x20 Hex socket head bolt. [2] Insert 0.3mm feeler gauge of 1R366 into the gap of Flywheel and Ignition coil and then loosen two M4x20 Hex socket head bolts slightly.

  • Page 24: Checking Of Ignition Coil

    6-12 Checking of Ignition coil For checking troubles in Ignition System of Gasoline engines. Set it between Plug cap and Plug to check the state of ignition. Note: Do not remove Spark plug. · It is necessary to check the sparks generate certainly by pulling Starter rope against the compressed air in Cylinder for normal ·...
  • Page 25 6-13 Checking of Ignition coil (cont.) Next, check the behavior during engine’s run as the following order. Fig. 6-13-1 Purpose: Clarify the cause of stall and poor acceleration resulting from; vanishment of sparks or the other reasons. [1] Attach Alligator clip to Spark [2] Turn Spark distance adjusting knob so that the spark plug.

  • Page 26: Recoil Starter Assembly

    6-14 Recoil starter Assembly 6-14-1 Disassembling [1] Remove Recoil starter. (See 6-5-1 Disassembling.) Fig. 6-14-1-1 [2] Pull Starter knob to wind the Starter rope twice around Reel and hold Reel by hand so as not to return. [3] Pull the loose rope from Starter case. Set the rope into the groove of Reel and turn Reel clockwise to eliminate the reaction force.
  • Page 27 6-14-1-2 For EBH253 series; with Rapid start function Fig. 6-14-1-2-1 Fig. 6-14-1-2-2 [5] Untie the knot of the rope and remove the rope from [4] Remove M5x12 Tapping screw and then remove Reel Starter knob. from Starter case. Reel How to reel Knot of the rope Starter...
  • Page 28 Set the one end of Spiral spring to the hook of Reel. · Rewind the spring counterclockwise toward the center of · circle and fit the spring into Reel. Note: Apply Makita grease FA No.2 to the spring in advance. Spiral spring Reel Hook Fig.

  • Page 29: Assembling

    [2] Set Spiral spring into Starter case while Touching releasing Spiral spring from the wire. Separate Note: Apply Makita grease FA No.2 to the spring in advance. (Refer to Fig. 5-1-1 in page 4.) Round wire Center boss Spiral spring...

  • Page 30: Pulley (Plate) (Ebh252 Series)

    6-15 Pulley (plate) (EBH252 series) 6-15-1 Disassembling Fig. 6-15-1-1 Remove Pulley by turning it counterclockwise with 1R183, Socket bit 19 and an impact driver. Counterclockwise Impact driver Pulley 1R183 Socket bit 19 6-15-2 Assembling Fig. 6-15-2-1 Insert 1R372 into Cylinder, then gently turn Flywheel until Piston touches 1R372, and then fix Pulley with 4-7 N·m with a torque wrench, 1R183, 1R219 and 1R220.

  • Page 31: Pulley (Aluminum Diecast) (Ebh253 Series)

    6-16 Pulley (aluminum diecast) (EBH253 series) 6-16-1 Disassembling Fig. 6-16-1-1 Insert 1R372 into Cylinder, then gently turn Flywheel until Piston touches 1R372, and then turn Pulley counterclockwise with 1R316 to remove. Counterclockwise Pulley 1R316 6-16-2 Assembling Fig. 6-16-2-1 Insert 1R372 into Cylinder, then gently turn Flywheel until Piston touches 1R372, and then fix Pulley with 4-7 N·m with a torque wrench, 1R183 (not fitted exactly, but available without any problem), 1R219 and 1R220.

  • Page 32: Engine Block

    6-17 Engine block 6-17-1 Disassembling [1] Remove Clutch and Cylinder cover (6-5-1), Flywheel (6-6-1), Carburetor (6-8-1), Recoil starter Assembly (6-5-1), Pulley (6-15-1, 6-16-1), Fuel tank, Ignition coil (6-10-1). Fig. 6-17-1-1 [2] Remove Insulator. Insulator gasket Intake pipe Note: Be careful of the orientation. Note: Be careful of the orientation.
  • Page 33 Fig. 6-17-1-3 Fig. 6-17-1-4 [4] Remove three M5x14 Hex socket head bolts and Cam [5] Pull out Pin 4 and then remove two Cam lifters. gear cove. Cam gear cover gasket is removed. Pull out Pin 5 and then remove Cam gear assembly and two Rods 2.5.
  • Page 34 Fig. 6-17-1-9 Fig. 6-17-1-10 [10] Remove Oil tube by loosening Hose clamp with 1R311. [11] Loosen eight M5x14 Hex socket head bolts that fasten Crankcase to Cylinder block. 1R311 Oil tube Hose clamp M5x14 Hex socket head bolt (8 pcs.) Fig.
  • Page 35 Fig. 6-17-1-12 Fig. 6-17-1-13 [13] Insert the grip of a plastic hammer into Cylinder block to support Exhaust valve, and [14] Remove Spacer with then remove Spring retainer on Compression spring 9 by pushing and sliding it. 1R311 or the like. Exhaust valve section can be disassembled.
  • Page 36 6-18 Engine block (cont. - Piston section) 6-18-1 Replacing Fig. 6-18-1-1 Fig. 6-18-1-2 [1] Pinch one end of Clip (2 pcs.) with thin long nose [2] Push out Piston pin with a bit of Cordless impact driver or a rod. pliers, and slide it out of the groove of Piston.
  • Page 37 Fig. 6-18-1-4 [4] When you set Crankshaft assembly and Piston section in place, apply lubricants to the specific portions. 4 cycle engine oil Makita grease FA No.2 6-19 Engine block (cont. ) 6-19-1 Assembling [1] Assemble by reversing the Disassembling procedure.
  • Page 38 Fig. 6-19-1-5 Fig. 6-19-1-6 [7] Align the markings of Cam gear assembly and [8] Assemble Cam gear cover and Cam gear cover gasket to Crankcase, and then insert Pin 5 into Cam gear Cylinder block with three M5x14 Hex socket head assembly.

  • Page 39: Final Check

    Fig. 6-19-1-9 Fig. 6-19-1-10 [11] Fix Case gasket with Retainer plate and M4x10 Hex [12] Assemble Oil case with four M5x14 Hex socket head socket head bolt. bolts. M4x10 Hex M5x14 Hex socket socket head bolt head bolt (4 pcs.) Oil case Case gasket Retainer plate...

  • Page 40: Tightening Torque Specifications

    TIGHTENING TORQUE SPECIFICATIONS *W: Spring washer R: Flat washer Tightening torque Parts to fasten Fastener Q’ty (N･m) Flywheel Crankshaft assembly M6x16 Hex head bolt 9.0 - 11.0  M5x14 Hex socket head bolt with 5.0 - 8.0 Gear case assembly Shaft pipe complete ...

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