Section E - Hydraulics
Fault Finding
Power Management System (P.M.S.)
E - 50 E - 50
9803-9450-2
Power Management System (P.M.S.)
Warning Light Indications
Fig 38.
When the ignition is turned on the warning light G should
come on to indicate that the PMS is live. When the engine
is started the light should go off.
Blink Codes
If a PMS fault occurs, light G may flash one of the following
blink codes:
K
Fault Tracing ( T E-51)
System Check
1 Make sure that the hydraulic fluid is at correct working
temperature (50 °C, 122 °F).
2 Remove the seat and seat base.
3 Connect a 0 - 40 bar (0 - 600 lb/in
2
) pressure gauge
to test connector A.
Fig 39.
4 Set up a tachometer to read engine speed from either
the crankshaft pulley or the fan pulley. If a tachometer
is not available, the speeds can be approximated.
Note: The tachometer reading on the fan pulley will be
higher than crankshaft speed K
Table 11. ( T E-50).
5 On machines fitted with control F, turn the control fully
anti-clockwise.
6 Start engine. Gradually increase engine speed from
idle to maximum speed. The pressure gauge reading
should rise with engine speed and show the
pressures given in the table K
Table 11. ( T E-50). If
the readings are not correct K
Calibration
Procedure ( T E-63).
Table 11.
7 On machines fitted with control F, keep the engine
running at maximum speed and turn control F
clockwise slowly. The pressure should fall from 20 bar
Blink Code Fault
1 One long flash followed
by one short flash
Signal from alternator W
terminal absent or
incorrect.
2 One long flash followed
by two short flashes
Sensitivity control F not
working (if fitted)
3 One long flash followed
by three short flashes
Dump valve solenoid
short circuit
4 One long flash followed
by four short flashes
Dump valve solenoid
open circuit
/
.
Crankshaft
Speed
Fan Speed Pressure
Idle to 1800 Idle to 1980 10 bar
(145 lb/in
2
)
2400 to
maximum
2680 to
maximum
20 bar
(290 lb/in
2
)
A
H
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