HYDRAULIC BREAKERS
Photo may include optional equipment.
JTHB SERIES FROM 90 ~ 6.800 kg.
TECHNOLOGY AND HIGH IMPACT DESIGN, JTHB SERIES »»JTHB breakers of Komatsu provides unique benefits due to an innovated combination of efficient design and advanced technology that guaranteed maximum reliability and lower operating costs. »»JTHB breakers are ideal for applications from construction, quarryng, demolition, recycling, mining and excavation.
STANDARD FEATURES Short side bolt
with portected threads boost lifetime and reliability FEATURES
BENEFITS
· Daul power source combines hydraulic and gas energy. · Recoil energy is absorbed and recycled for the next blow.
High impact and productivity.
· Up to 30% fewer parts. · More durable components . · No rubber bladder-type accumulator. · Overhaul every 600 hours.(*)
Reduces operating cost and maintenance.
· Only 2 moving parts (piston and control valve). · Buil-in dust protection system.
Maximun reliability.
absorbs piston recoil and recycles the energy for the next blow.
Large piston mass
for optimal alignment energy transfer and efficiency.
Simple control valve
· Short tie with vibration-reducing vulcanised rubber sleeves. · Protected threads.
Less vibration and noise.
minimize oil flow interruptions and hydraulic pulsations
· Nitrogen gas cushion.
Less stress on the machine and operator.
Weight ratio
· Extensive range of breaker chisel. · Kit for special applications.
Versatility.
· Noise-reducing breaker brackets.
Environmentally friendly.
· Fast service and repair through Komatsu’s worldwide network.
Rediced downtime.
(*) Performance under normal operations.
2
Nitrogen gas cushion
HYDRAULIC BREAKERS JTHB SERIES
for greater energy transfer and less recoil.
Dual retainer pins ensure correct alignment and easy replacement of tool.
Types of chisel DESCRIPTION Flat (Phillips / Palette) Moil point (Cross) Flat end (Impact breaking)
PURPOSE
APLICATION
General demolition through cutting action. e.g.trenching and slope finishing.
Penetration breaking
General demolition. e.g. concrete, rock bed.
Penetration breaking
Demolition e.g. secondary rock breacking, scaling in mines and tunnels, reinforced concrete floors.
Impact breaking
Komatsu hydraulic breaker advantage
Automatic oil flow change With Komatsu Excavator it is possible to change hydraulic oil flow and hydraulic circuit through the screen monitoor in cabin from breaker mode to attachment mode (HM800 screen monitor).
Oil performance
Based on Komatsu in-house data comparison.
Komatsu recommended hydraulic oil High-performance hydraulic oils that have passed Komatsu’s unique stringent quality requirements.
Commercial hydraulic oil
Komatsu genuine hydraulic oil
Low-pressure hydraulic oil for industrial machinery (Vane pump, gear pump)
Low
Load-carrying capacity
High
Komatsu recommended hyper white grease Extreme-pressure grease suited even for high load construction machinery. MAIN FEATURES
Hardened allow
increases durability and range of applications
Product name
High load bearing capacity
Antiwear property
Heat resistance
Water resistance
Anticorrosion
Remarks
Hyper white grease
Multipurpose white grease
Lithium EP grease
General grease
Do not use Molybdenum content grease. It will cause the hydraulic components to fail on excavator. Optimum Adapted
3
PRECAUTIONS FOR HYDRAULIC BREAKER Maintenance 01
Greasing every 2 hours, chisel must be pushed-in position.
Excessive grease causes contamination into oil, seal damage.
02
Filters Elements, Hydraulic Oil, Consumable Parts.
Hydraulic oil tank
Main filter
Check tighness of bolt, nut and hose
MODEL
Grease pump
JTHB08 ~ 20
2~3
JTHB30 ~ 40
4~5
JTHB50 ~ 60
5~6
JTHB120
6~7
JTHB160~210
7~8
JTHB350
8~9
JTHB450
9~10
JTHB650
10~11
JTHB850
11~12
Check wear of retainer pin, chisel and bushing
Retainer pin
Additional filter Chisel and bushing Crevice
Extension filter
Hydraulic oil tank
Komatsu Filter: Every 250 hours (Main/additional)
03
Acording manual
Repair excess bulge or burr
Komatsu Oil: every 1.000 hours.
Before Operation.
Set B-mode
Open stop valve
Open
Breaker seal recovery
04
Control hydraulic oil temperature
Start without recovery causes seal and piston damage.
40~60º
Operate breaker under temperature ranging from 40~ 60°C.
Storage
Chisel side must be lower than cylinder side. Apply anti-rust spry.
Cover by sheet to prevent from rain and dew.
See Operation & Maintenance manual. 4
Use only genuine oil.
Close
10~20 min
Other modes may cause damage to breaker / excavator
Replace before wear limit
HYDRAULIC BREAKERS JTHB SERIES
Plug hose end to keep dust and dirt away.
OIL & FILTER REPLACEMENT CYCLE ITEM
REPLACE HOURS (e.g.: PC200-8)
Hydraulic oil
1.000
Hydraulic oil filter element
250
Pilot filter element
250
Additional filter for breaker
250
Operation 01
Stop operating if hose swings irregularly.
02
Accumulator may be broken.
04
Keep 90° angle to object.
Do NOT dip chisel bush into water or mud.
03
It causes damage to breaker and excavator.
05
NO more than 1 minute continuous hammering.
It causes damage to work equipment.
06
It cause oil seal damage.
07
Stop hammering when object is broken.
08
Idle blow causes damage to breaker.
10
Do NOT swipe with breaker.
It causes damage to breaker and excavator.
Do NOT juggle by chisel.
It causes damage to breaker and excavator.
11
Do NOT move rock with braker.
It causes damage to breaker and excavator.
Do NOT operate excavator cylinder at full stroke
Break from end edge for large and hard rock.
For efficient breakage.
09
Do NOT hit by using equipment force.
It causes damage to breaker and excavator.
12
Do NOT lift objects with breaker.
Breaker is not a crane.
5
15 MODELS TO CHOOSE FROM MEDIUM RANGE
MINI RANGE
LARGE RANGE
SPECIFICATION / DESCRIPTION
SIZE
JTHB08-3
JTHB10-3
JTHB20-3
JTHB30-3
JTHB40-3
JTHB50-3 / JTHB50-3 (BHL)
Side mount bracket
kg
75
85
105
175
235
300
Top mount box bracket
kg
85
125
170
250
340
400
Oil flow
l/min
18 ~ 25
20 ~ 30
20 ~ 35
25 ~ 45
30 ~ 55
35 ~ 60
Operating pressure
MPa
6 ~ 13
7 ~ 14
8 ~ 15
10 ~ 15
10 ~ 16
10 ~ 16
Impact rate
bmp
930 ~ 1.300
700 ~ 1.200
600 ~ 1.150
550 ~ 1.000
580 ~ 1.060
550 ~ 1.000
Chisel diameter
mm
40
45
50
58
64
75
Chisel weight
kg
4.0
5.5
7.4
11.9
15.2
23.2 1/2"
Hose size
inch
3/8"
1/2"
1/2"
1/2"
1/2"
Gas pressure
MPa
0,8
0,8
0,8
0,8
0,8
0,8
Base machine weight range
Ton
0.7 ~ 1.5
1~2
1.5 ~ 2.5
2.4 ~ 4
3 ~ 4.5
3.8 ~ 6
PC10MR
PC18MR
PC20MR
PC30MR / PC35MR
PC45MR
PC55MR / 56 / WB9X
Excavator model
Specifications are subject to change without notice. 6
HYDRAULIC BREAKERS JTHB SERIES
1,5 m.
With a range of 15 hydraulic breakers from 90 ~ 6.800 kg. You’re guaranteed to find the right tool for the job.
1,0 m.
0,5 m.
3,0 m.
2,5 m.
2,0 m.
1,5 m.
1,0 m.
0,5 m.
SPECIFICATION / DESCRIPTION
SIZE
JTHB60-3
JTHB120-3
JTHB160-3
JTHB210-3
JTHB350-3
JTHB450-3
JTHB650-3
JTHB850-3
Side mount bracket
kg
430
820
1.010
1.710
2.530
3.100
4.550
6.800
Top mount box bracket
kg
585
950
1.240
1.780
2.790
3.600
4.750
7.000
Oil flow
l/min
45 ~ 80
80 ~ 120
100 ~ 140
160 ~ 200
180 ~ 230
240 ~ 300
280 ~ 390
320 ~ 400
Operating pressure
MPa
10 ~ 16
14 ~ 18
12 ~ 17
14 ~ 18
13 ~ 18
14 ~ 18
14 ~ 18
14 ~ 18
Impact rate
bmp
550 ~ 1000
450 ~ 720
430 ~ 600
450 ~ 630
380 ~ 450
340 ~ 470
370 ~ 470
375 ~ 500
Chisel diameter
mm
95 (75)
105
115
135
146
160
176
210
Chisel weight
kg
42,6 (23,2)
63,5
91,5
133
185
236
287
340
Hose size
inch
3/4"
3/4"
3/4"
1"
1"
1,25"
1,25"
1,25"
Gas pressure
MPa
1
1,1
0,8
1,1
0,8
0,8
0,8
0,8
Base machine weight range
Ton
6~11 (5.5 ~ 8)
8 ~ 14
14 ~ 20
18 ~ 25
27 ~ 40
38 ~ 50
45 ~ 70
70 ~ 100
PC200 / 270
Clase PC300
Clase PC400
Clase PC600
Clase PC850
Excavator model
PC60 / 88 / 78US PC128US / 138US / 100 / 120 PC160 / 180 / PW200
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Product designs, specifications and/or data in this document are provided for informational purposes only and are not warranties of any kind. Product designs and/or specifications may be changed at any time without notice. The only warranties that apply to sales of products and services are standard written warranties, which will be furnished upon request. Komatsu, and related logo are trademarks of Komatsu Ltd. or one of its affiliates. © 2017 Komatsu Ltd. or one of its affiliates. All rights reserved.
For further information, contact your distributor or visit our website www.komatsulatinoamerica.com KLAT-AM002/01-2017ENG