jcb JS300 Service Manual page 918

K Fig 7. ( T E-257)
Key:
W Boom 2
X Pressure (bar)
With max engine rpm's and no service selected
With service fully selected
E-257
Test 005: Checking the Operation of the Main Hydraulic Spool
26
25
W
X
11
3.4
0 2 4
Table 17.
Pressure at spool port which is
41-45 bar* (594 - 652 lb/in
9813/5100-1
Hydraulic System Fault Finding
6 8 10
Z
Fig 7.
K Fig 7. ( T E-257)
Key:
Y All Other Spools
Z Spool Stroke (mm)
being selected
(expected pressure)
0 - 3 bar (43.5 lb/in 2 )
2 )
Section E - Hydraulics
Y
Pressure at spool port at which
is not being selected
(expected pressure)
0 - 3 bar (43.5 lb/in
0 - 3 bar (43.5 lb/in
A409210-C4.eps
2 )
2 )
E-257