Dynapac CA 251, Maintenance Manual

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5 CA 251 M251-1EN1
The ROPS bolts are
always to be torque-tightened dry.
Bolt size: M24
Strength class: 8,8
Tightening torque: 640 Nm
ROPS
Tightening torque
Tightening torque in Nm (lbf.ft) for oiled bolts tightened
with a torque wrench.
Hydraulic system
Opening pressure (MPa)
Drive system 35
Supply system 2
Vibration system 35
Steering system 14
Brake release 1,5
Measured acoustic pressure level, LpA, on hard
base and vibration switched OFF:
Cummins: LpA: 92 dB(A)
Cummins with cab: LpA: 84 dB(A)
Noise level – Operator’s station
(ISO 6394)
Measurements taken with vibration ON and on foam-
rubber mat (Limit value 0.5 m/s
2
):
Machine Operator’s Operator’s platform
vibration level seat (m/s 2 )* floor (m/s 2 )**
CA 251Std./D 0,39 0,31
+ ROPS 0,29 0,33
+ cab 0,21 0,17
+ ROPS and cab 0,16 0,21
CA 251A 0,05 0,09
+ ROPS 0,04 0,04
* Sum of acceleration in the operator’s seat.
** Maximum acceleration in floor in z-axis.
Whole body vibration
– Operator’s station (ISO 2631)
(Hand/arm - steering wheel and F/R
lever vibration is less than the limit
value, 2.5 m/s
2
.)
Measured acoustic power level, LpA, on hard base
and vibration switched OFF:
Cummins: LwA: 112 dB(A)
Acoustic power level –
Surroundings
(SS 4591010)
M STRENGTH CATEGORY
thread 8.8 (Grade 5) 10.9 (Grade 8)
M4 2,5 (1.8) 3,4 (2.5)
M5 4,9 (3.6) 7,0 (5.2)
M6 8,4 (6.2) 12 (8.9)
M8 21 (15.5) 28 (20.7)
M10 40 (29.5) 56 (41.3)
M12 70 (51.6) 98 (72.3)
M16 169 (124.7) 240 (177)
M20 330 (243.4) 470 (346.7)
M24 570 (420.4) 800 (590.1)
M30 1130 (833.5) 1580 (1165.4)
M36 1960 (1445.7) 2800 (2065.3)