New Holland T7030 Service Manual page 68

DISTRIBUTION SYSTEMS - PRIMARY HYDRAULIC POWER SYSTEM
Hydraulic pump - Pressure test
IMPORTANT: Before a pressure test or volume flow measurement, drive the tractor until the transmission oil in the
rear axle is warmed up to operating temperature. 65 °C ( 145 °F).
Low pressure standby
1. The following tests constitute a function test of the
hydraulic pump and the connected high pressure oil
circuits. Unscrew the Load-Sensing line (1) of the
remote control units and screw on the screw plug (2)
297604 .
2. Connect a pressure gauge with display range 0 - 40
bar ( 0 - 600 lbf/in2) 293242 to the remote connec-
tion of the control unit. Use the oil coupling 5101741
or 293449 , adapter 297606 , fast coupling sleeve
297240 , fast coupling 291924 and hose 292246 to
do this.
Set the engine speed to 1500 rev/min.
3. Pull the relevant control unit control lever and hold in
the Raise position.
A pressure of 26±1 bar ( 377±15 lbf.in2) must be
displayed. This is the 'Low pressure standby'.
IMPORTANT: Do not operate the tractor brake, while the
control unit lever is in the Work position, because this
increases the system pressure to the maximum pressure
of 120 - 140 bar ( 1740 - 2031 lbf.in2) and damages the
pressure gauge.
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