Makita HP2050F, HP2050, HP2051, HP2051F User Manual

ECHNICAL INFORMATION

Models No.

Description

HP2050, HP2050F, HP2051, HP2051F

2 Speed Hammer Drills 20mm

CONCEPT AND MAIN APPLICATIONS

Makita new 700W class hammer drills with extra low vibration level, yet with superior working performance has just been released. The features and benefits are : * Slim and smart shape hammer drills, yet loaded with torque limiter * Extra-low vibration level for comfortable and less fatigue operation * Model HP2050F and HP2051F are equipped with built-in job light * HP2051 and HP2051F are equipped with keyless drill chucks.

Specification

Model No. Length ( L ) Height ( H )

Width ( W )

Dimensions : mm ( " )

HP2050(F) HP2051(F)

372 (14-1/4)

360 (14-1/8)

220 (8-5/8)

70 (2-3/4)

PRODUCT

P 1 /17

Voltage (V) Cycle (Hz)

110 120 720 220 230

240

Model No. HP2050.

No load speed : (min -1= rpm)

Blows per min. : (min -1= bpm)

Keyless chuck Chuck ability : mm ( " )

Drilling capacity : mm ( " )

LED job light Reverse switch

Protection from electric shock Cord length : m ( ft )

Net weight :Kg (lbs )

Current (A)

6.9

6.6

3.4

3.3

3.2

Concrete

Steel

Wood

50 / 60 50 / 60

50 / 60 50 / 60 50 / 60

(High) (Low)

(High) (Low) (High) (Low) (High)

(Low)

Continuous Rating (W)

Input Output

720

720 720

720

HP2050F HP2051 HP2051F.

0 - 2,900 0 - 1,200

0 - 58,000 0 - 24,000

1.5 - 13.0 (1/16 - 1/2) 20 (3/4)

20 (3/4)

8 (5/16)

13 (1/2) 25 (1) 40 (1-9/16)

Yes Yes

by double insulation

2.5 (8.2)

2.3 (5.1)

Yes YesNo

Yes

360 360

360

Max. Output(W)

660 660

660

Standard equipment

* Chuck key S-13 (only for HP2050 and hP2050F) ................. 1 pc.

* Key holder (only for HP2050 and hP2050F) ........................ 1 pc.

* Depth guide ............................................................................ 1 pc.

* Side grip set ........................................................................... 1 pc.

* Plastic carrying case ............................................................... 1 pc.

< Note > The standard equipment for the tool shown may differ from country to country.

Optional accessories

* TCT. drill bit 5 - 19mm * Drill bit for metal 13mm * Drill bit for wood 40mm * Center drill bit for hole saw 16 - 90mm

* Metal borer 14 - 35mm * Depth guide * Wrench 9 * Blow-out bulb

* Keyless drill chuck * Drill chuck set * Side grip set * Type 43 drill stand

* Chuck key S-13 (for HP2050, HP2050F)

Repair

< 1 > Lubrication

Apply MAKITA grease N No.1 to the following portions marked with black triangle to protect parts and machine from unusual abrasion. See Fig. 1.

Gear housing

P 2 /17

Spindle

Cam

Apply 25g of MAKITA grease N No.1 to the inner part of gear housing.

Fig. 1

< 2 >Assembling and disassembling

( 1 ) Disassembling drill chuck See Fig. 2.

1. Hold the flat portion of spindle with No.1R139 "drill chuck extractor" which is fixed with vise.

2. Insert No.1R298 "hex wrench" into drill chuck and grip it firmly with drill chuck.

3. Turn No.1R298 "hex wrench" anti-clockwise, with No.1R223 "torque wrench" to which No.1R224 "ratchet head" is attached. Then, drill chuck can be disassembled from spindle.

In case of broken drill chuck, it may be impossible to grip hex wrench with drill chuck. If so, firmly grip drill chuck with pipe wrench. And turn the pipe wrench anti-clockwise. So, the drill chuck can be disassembled.

Gear housing

Spur gear 29-37

Change lever B

( 2) Assembling drill chuck See Fig. 2.

1. Preset the torque level of No.1R223 "torque wrench" to 35.7N.m - 45.9N.m (350kgf.cm - 450kgf.cm).

2. Hold the flat portion of spindle with No.1R139 "drill chuck extractor" which is fixed with vise

3. Insert No.1R298 "hex wrench" into drill chuck and grip it firmly with drill chuck.

4. Turn No.1R298 "hex wrench" clockwise, with No.1R223 "torque wrench" to which No.1R224 "ratchet head" is attached. Then, drill chuck can be assembled to spindle.

No.1R298 Hex wrench

Fastening

No.1R139 Drill chuck extractor

No.1R223 Torque wrench

No.1R224 Ratchet head

Loosening

Fig. 2

Repair

( 3) Disassembling gear section See Fig. 3.

1. Separate gear housing cover from gear housing.

2. Pull out lock plate.

3. Then change lever B, pin, rack 12 with change plate B and spur gear 29-37 can be disassembled from gear housing.

P 3 /17

Gear housing

Change lever B

( 4) Assembling gear section

1. Assemble the spindle section to gear housing as illustrated Fig. 4 below.

Bearing retainer 20-36

Spur gear 29-37

Lock plate

Rack 12

Fig. 3

Oil seal 19

Spindle section (including conical compression spring 15-2, cup washer 15, ball bearing 6202LLB and cam A)

Gear housing

Change plate B

Gear housing cover

Ring spring 11

Fig. 4

When assembling bearing retainer 20-36 and oil seal 19, refer to "( 6) Assembling bearing retainer 20-36 and oil seal 19" at page 5.

2. Insert change plate B into rack 12 as illustrated Fig. 5 right.

3. Set the above assembled one to spur gear 29-37 as illustrated Fig. 6 right.

4. Make sure that leaf spring is assembled in gear housing in advance. If not, assemble it. Assemble spur gear 29-37 to spindle and at the same time, assemble rack 12 w/ change plate B to gear housing as illustrated in Fig. 7 right.

Gear housing

Rack 12

Leaf spring

Change plate B

Fig. 5

Spur gear 29-37

Fig. 6

Spur gear 29-37

Spindle

Rack 12 with change plate B

Fig. 7

Repair

4. Insert pin 4 through rack 12 into gear housing. And then, rush rack 12 until it reaches the bottom wall of gear housing. See Fig. 8. Keeping the above position of rack 12, assemble change lever B to gear housing with aligning its "I" mark to the triangle mark of gear housing. See Fig. 8 and Fig. 8A.

Spur gear 29-37

P 4 /17

Spindle

Pin 4

Change lever B

5. Assemble lock plate to gear housing with setting its tail portion between ribs of gear housing.

5. Assemble gear complete to the gear housing as illustrated in Fig. 9.

Lock plate

Rack 12

Rib

Fig. 8

Fig. 8A

Gear complete

Fig. 9

Repair

( 5) Disassembling bearing retainer 20-36 and oil seal 19

1. Remodel the top portion of No.1R292 "wrench for bearing retainer" by grinding, in order to fit it on the spindle head. See Fig. 10.

2. Turn 1R292 "wrench for bearing retainer" clockwise. Then bearing retainer 20-36 can be removed from gear housing. See Fig. 11. And then, take off oil seal 19 with flat head screwdriver.

1R292 Wrench for bearing retainer

Remodel by grinding this portion to fit it on spindle head.

No.1R292 Wrench for bearing retainer

Fig. 10

P 5 /17

Loosening

Fig. 11

( 6) Assembling bearing retainer 20-36 and oil seal 19

1. Apply MAKITA grease N No.1 to oil seal, and assemble oil seal 19 pressing with arbor press. See Fig. 12. <Note in assembling> Oil seal has to be always replaced with fresh one. Because it is easily deformed,when disassembling. Fig. 12

2. Assemble bearing retainer 20-36 with No.1R292 "wrench for bearing retainer" by turning it anti-clockwise. See Fig. 13.

Arbor press

1R030 Bearing setting pipe

Oil seal 19

1R292 Wrench for bearing retainer

Bearing retainer 20-36

Fastening

Fig. 12

Fig. 13

Repair

( 7) Disassembling cam A

1. After removing bearing retainer 20-36 and oil seal 19, disassemble ring spring 11 from spindle. And disassemble spindle section by pulling out from the drill chuck side of gear housing as illustrated in Fig 14.

P 6 /17

Gear housing

Spindle section (including conical compression spring 15-2, cup washer 15, ball bearing 6202LLB and cam A)

Fig. 14

2. Accept ball bearing 6202 LLB with 1R232 "pipe 30", and press spindle with arbor press. So, cam A, ball bearing 6202LLB, cup washer 15 and conical compression spring 15-24 can be separated from spindle as illustrated in Fig. 15.

Spindle

Cam A

Ball bearing 6202 LLB

1R232 Pipe 30

Spindle

Ring spring 11

Cam A Ball bearing 6202 LLB

Cup washer 15

Conical compression spring 15-24

Fig. 15

( 8) Assembling cam A

1. Assemble conical compression spring 15-24 and cup washer 15 to spindle. When assembling, they have to be assembled as illustrated in Fig. 16A.

Cup washer 15

Conical compression spring 15-24

Fig. 16A

Fig. 16B

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