jcb 3CX - Example - Boom Ram 110 X 60

24 - 4
EXAMPLE - Boom Ram110 x 60
1 Using the figures given in the table on page 3, plot a
graph for the ram to be tested.
2 Check the pressure in the ram (induced by the applied
load). In this example the pressure on the gauge reads
107 bar; 1500 lb/in
2
.
3 Draw a vertical line from the pressure reading to the
plotted graph line. Where the vertical line intercepts the
graph line, draw a horizontal line and read the permitted
ram displacement. In this example the permitted
maximum displacement is 18 mm.
Note: A blank graph is provided on the next page,
photocopy and use as required.
Section E
Hydraulics
9803/3280
Section E
24 - 4
Issue 1
Service Procedures
0
50 100 150 200 250
20
40
60
80
100
120
8mm
18mm
26mm
52mm
MAXIMUM RAM MOVEMENT PERMITTED (mm)
PRESSURE (BAR)
380210
Boom Ram 110:60
69bar 138bar107bar 207bar
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