Schwing SP 305, Operation Manual

Page: 71 / 104

Appendix
SP 305
Startup 250:Users:Danny:Desktop:Operation manuals:line pumps:maverick
(P305):Appendix.fm
Operation Manual -
71
Now plot the readings on the output chart. Take a clean
output chart and proceed as follows:
• Lay a straight edge horizontally across the
page at the pressure point you are plotting.
Draw a light line across the chart. In the exam-
ple below, we use the rod side scales and curve
(you could use the piston side scale and curve
instead). The ruler is shown ready to draw a
line at 250 bar hydraulic pressure.
• Turn the ruler vertically, and draw a light line
up the page from the liters/minute reading you
took at that pressure (remember to multiply the
reading by 2). In our example, we measured
276 liters at 250 bar.
• Put a dot at the point where the two lines inter-
sect.
• Do the same thing with each pressure reading.
You should end up with six dots.
13
CONCRETE OUTPUT (cu yd / h)
NUMBER OF STROKES
(stroke / min.)
OIL VOLUME
(liter / min.)
NUMBER OF STROKES
(stroke / min.)
OIL VOLUME
(liter / min.)
26 39 52 65 78 92 105 118 131 144 0
103
157 170 183
ROD SIDE
HYDRAULIC RELIEF VALVE IS SET AT
300 BAR MAX. PRESSURE (4350 PSI).
PUMP SPEED
2100 RPM
PERFORMANCE CHARACTERISTICS OF
THE AXIAL PISTON HYDRAULIC PUMP
PISTON SIDE
PISTON
SIDE
ROD
SIDE
100 200 300 400
350
100 200 300 400 50 150 250
500
5 10 15 20 25
5 10 15 20 25 30
15.5
PIST
ON SIDE
(bar)
ROD SIDE
(bar)
CONCRETE
PRESSURE
(BAR)
7
14
21
28
34
41
48
55
62
70
76
83
90
97
103
110
117
124
131
138
CONCRETE
PRESSURE
(PSI)
100
200
300
400
500
600
700
800
900
1000
1100
1200
1300
1400
1500
1600
1700
1800
1900
2000
1285 88.6
52 758
350
50
100
150
200
250
300
50
100
150
200
250
300
350
OIL
PRESSURE
(BAR)
30
196
170.5
26
breakpoint
178 bar
1 2 3 4 5 6 7 8 9 10 11
000454.eps
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