Makita HM1214C dimensions Bearing box section, Piston, Crank section

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Repair

[3] DISASSEMBLY/ASSEMBLY

[3]-4. Bearing box section, Piston, Crank section

DISASSEMBLING

(1)Remove Handle section and Controller cover to hold the machine upright. (Fig. 2)

(2)Separate Barrel section from Crank housing complete (the left illustration in Fig. 6)

(3)Disassemble Cylinder section (Fig. 7)

(4)For repairing Piston & Crank section, Motor section has to be separated from Crank housing complete. Separate Motor housing from Crank housing complete in order of Figs. 17 and 18.

Fig. 17

Disassemble Gear cover, and then, remove Flat washer 14 and Gear complete 34-48.

M6x30 Hex socket

head bolt (6pcs.)

Gear cover

Flat washer 14

Gear

complete 34-48

Piston

And then, remove two Needle		Disassemble Rear cover.
gauges and Flat washer 14.		So, Motor housing comes
	Needle gauge	into your sight.
Helical gear 52
	1412 (2pcs.)

	Flat washer 14

Motor housing

Rear cover

M6x30 Hex socket head bolt (6pcs.)

Turn Helical gear 52 until Piston comes out from Crank housing complete.

O rings on Piston can be replaced in this step.

Fig. 18

Disconnection of the Contact of Carbon brush with Commutator

Carbon brush is pressed with Spiral spring to maintain its contact with Armature's commutator.

Detach Spiral spring from Carbon brush.

By pulling Carbon brush, disconnect the contact with Armature's commutator.

Spiral spring Carbon brush

Carbon brush

Spiral spring

Carbon brush

Remove Motor housing by levering it up with 2 pcs. of 1R263 as illustrated below.

1R263

Image 9

Contents Specification Optional accessoriesStandard equipment Repair Tool holder sectionTool holder section Gear and Crank section Hammer sectionBarrel and AVT mechanism Cylinder section Approx g Makita grease N.No.1Chuck section DISASSEMBLY/ASSEMBLYAssembling Barrel sectionRepair DISASSEMBLY/ASSEMBLY 3-2. Barrel section Before Correction Ring Fluoride ring 28 the worn oneCorrection After Correction CorrectedTool holder section Disconnection of the Contact of Carbon brush with Commutator Bearing box section, Piston, Crank sectionBearing box section, Crank housing section Filter case cover Filter caseHousing DISASSEMBLY/ASSEMBLY Wrench Repair DISASSEMBLY/ASSEMBLY 3-5. Motor section Leaf Electrical parts in Handle sectionSpring Pay attention not to lose Leaf spring in this stepFastening Fastening torqueTorque 30 40 N.mMaintenance Program Controller Terminal Block Circuit diagramFig. D-2 Wiring diagram