Safety and operating instructions
Problem
Cause
Excessive wear of the piston tip
Spline breakage
Lack of lubrication
Dirt intrusion (specially when drilling
upwards)
Piston breakage
Lack of lubrication
Uneven tension in the side bolts
Worn intermediate part/piston guide (can
be confirmed by the cushion test)
Side bolt breakage
Uneven tension on the bolts
1
Gauge for chuck bushing 22 mm (
2
Use Atlas Copco no. 9090 0550 80 pressure gauge to test the water and air pressure.
Machine data
Type
Part number
RH 656W
8311 0303 45
Air consumption (6 bar)
Type
RH 656W
Noise and vibration declaration statement
Guaranteed sound power level Lw according to EN ISO 3744 in accordance with directive 2000/14/EC.
Sound pressure level Lp according to ISO 11201.
Vibration value A and uncertainty B determined according to EN ISO 20643. See table "Noise and vibration
data" for the values of A, B, etc.
These declared values were obtained by laboratory type testing in accordance with the stated directive or
standards and are suitable for comparison with the declared values of other tools tested in accordance with
the same directive or standards. These declared values are not suitable for use in risk assessments and values
measured in individual work places may be higher. The actual exposure values and risk of harm experienced
by an individual user are unique and depend upon the way the user works, in what material the machine is
used, as well as upon the exposure time and the physical condition of the user, and the condition of the machine.
We, Atlas Copco Construction Tools AB, cannot be held liable for the consequences of using the declared
values, instead of values reflecting the actual exposure, in an individual risk assessment in a work place situation
over which we have no control.
This tool may cause hand-arm vibration syndrome if its use is not adequately managed. An EU guide to managing
hand-arm vibration can be found at http://www.humanvibration.com/EU/VIBGUIDE.htm
We recommend a programme of health surveillance to detect early symptoms which may relate to vibration
exposure, so that management procedures can be modified to help prevent future impairment.
24
7
⁄
") hexagon shank Atlas Copco no. 3091 0038 00.
8
Piston bore
Stroke length
mm
(in.)
65
(2
1
⁄
)
2
l/s
Impact rate (6 bar)
(cfm)
48
(102)
© 2014 Atlas Copco Construction Tools AB | No. 9800 0657 71c | 2014-01-09
Solution
Change piston
2
Lower the water pressure
if it is the same as or greater than the
air pressure
Increase lubrication or change oil
Increase regularity of servicing
Lower the water pressure if it is the same as or greater than the air
pressure
Increase lubrication or change oil
Tighten the bolts correctly
Change the worn part
Tighten the bolts correctly
Overall length
mm
mm
(in.)
(in.)
60
630
(2
2
⁄
)
(24
4
⁄
)
6
5
Hole diameter
mm
Hz
(in.)
34
27-41
(1-1.6)
RH 656W
Weight
Shank dimension
kg
mm
(lb)
(in.)
22.0
22 X 108
(48.5)
(⅞ x 4¼)
Reaming hole diameter
mm
(in.)
≤76
(≤3)
Original instructions