Technical Data; Troubleshooting; Machine Data - Atlas Copco LH 11 Instrucciones De Seguridad Y De Funcionamiento

LH 11, 180, 190, 220, 230, 270, 280, 390, 400

Technical data

Troubleshooting

Problem
Breaker does not work. Pressure is not built
up when trigger is activated
Breaker does not work. Pressure is built up
when trigger is activated
Breaker runs weakly or irregularly
Hoses pulsate
Oil leaking from breaker
Working tool falls out

Machine data

Shank
dimension
(mm)
LH 11 22 x 82.5
LH 180 25 x 108
28 x 152
28 x 160
32 x 152
32 x 160
LH 190 E 25 x 108
28 x 152
28 x 160
32 x 152
32 x 160
LH 220 25 x 108
28 x 152
© 2011 Atlas Copco Construction Tools AB | No. 3392 5206 90b | 2011-01-27
Original instructions
Cause
No or incorrect flow/pressure
P and T hoses interchanged
Insufficient activation of trigger valve
Diaphragm failed
Back pressure too high
Quick-release coupling in return line
defective
Striking piston sticks, possibly due to
thickening of cylinder
Spool/reversing spool or auxiliary spool
sticking
Seals defective
Insufficient flow
Seals defective
Wear, internal leakage
Accumulator defective
Seals defective
Worn latch
Worn chisel bushing or tool
*Weight Length
(kg) (mm)
12.6 600
17.5 650
19.1 697
19.1 697
19.1 697
19.1 697
22.1 650
23.7 697
23.7 697
23.7 697
23.7 697
20.5 689
22.1 736
Safety and operating instructions
Solution
Check flow/pressure by means of test
equipment
Check connection. Standard connection has
oil flowing from male quick-release coupling
(i.e. the tail-hose of the breaker P connection
is fitted with female coupling)
Adjust trigger lever (if adjustable) or replace
defective parts
Dismount, check and replace seals
Make direct tank connection. Max. back
pressure 10-15 bar (150-200 psi) measured
at breaker
Locate and replace defective coupling
● Push the breaker hard against the
● Chamfer/polish the edge slightly at the
● Check oil viscosity. Thin oil increases the
Dismount and check that all parts move
easily. Polish slightly if necessary
Dismount, check and replace
Check flow/pressure
Replace seals
● Dismantle, check and replace defective
● Check oil for impurities and oil viscosity
● Thin oil = increased internal leakage
Replace accumulator diaphragm and charge
with nitrogen
Replace seals
Replace latch and roll pins
Replace bushing or tool
Impact Accumulator Operating
freq. pressure pressure
(Hz) (bar)
40 40
27 40
27 40
27 40
27 40
27 40
27 40
27 40
27 40
27 40
27 40
25-33 50
25-33 50
working tool
cylinder dashpot (where the cylinder bore
changes size)
risk of thickening
or worn parts
at working temperature
Flow rate EHTMA
(bar) (l/m) Category
70-90 18-22
95-115 18-22
95-115 18-22
95-115 18-22
95-115 18-22
95-115 18-22
95-115 18-22
95-115 18-22
95-115 18-22
95-115 18-22
95-115 18-22
110-125 18-30
110-125 18-30
C
C
C
C
C
C
C
C
C
C
C
D (C)
D (C)
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