Procedure for Charge Pressure Test:
Make sure hydraulic oil is at normal operating tem-
perature by operating the machine for approximately 10
minutes.
C. While machine is moving, monitor the charge
pressure reading on the pressure gauge (do not acti-
vate the lift control while monitoring pressure).
1.
D. The charge pressure should drop no more than
15%
from initial test reading (Step 8 above). A pres-
2.
Park machine on a level surface with the coring head
sure drop of more than 15% indicates a traction cir-
cuit problem (e.g. damaged or leaking proportional
valve (PV), worn or damaged piston pump (P1)).
fully raised. Make sure engine is off and the parking
brake is engaged. Secure coring head with service
latch.
11.
Shut off engine.
3.
Read Precautions For Hydraulic Testing in this sec-
tion.
12.Disconnect pressure gauge from hydraulic control
manifold port G2.
CAUTION
2
Operate all hydraulic controls to relieve system
pressure and avoid injury from pressurized hy-
draulic oil.
1
4.
manifold G2 port quick fitting (Fig. 14).
Connect pressure gauge to the hydraulic control
CAUTION
If using pressure gauge with hose, make sure
that hose is free of the left, rear wheel after
installation.
Figure 14
1.
Hydraulic manifold
2.
G2 port quick fitting
5.
Make sure that traction lever is in neutral and the
parking brake is engaged.
6.
+
Start engine and operate engine at full speed (3400
50 RPM).
7.
(2.8
Pressure gauge should read approximately 40 PSI
Bar). Record pressure reading.
8.
Turn off engine.
9.
If specification is not met, inspect proportional valve
PV in control manifold.
10.A
dynamic charge pressure test can be performed as
follows:
A. Leave pressure gauge connected to hydraulic
control manifold G2 port.
B. Disengage parking brake. Start engine and oper-
ate at full speed (3400 + 50 RPM). Move the traction
lever fully forward.
ProCore 648
Page 4 – 19
Hydraulic System
| Categories | Lawn Mower Manual, Sprinkler and Irrigation Manuals, Toro Sprinkler and Irrigation Manuals |
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