Toro Reelmaster 2000-D, Руководство по обслуживанию

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Reelmaster 2000–D Hydraulic System Page 4 – 29
Procedure for Charge Pump Relief Pressure Test:
1. Make sure hydraulic oil is at normal operating tem-
perature by operating the machine for approximately 10
minutes.
2. Park machine on a level surface with the cutting units
lowered. Make sure engine is off and the parking brake
is engaged.
3. Read Precautions For Hydraulic Testing.
CAUTION
Operate all hydraulic controls to relieve system
pressure and avoid injury from pressurized hy-
draulic oil.
4. Disconnect hose from the front fitting of the charge
pump returning from the control valve (Fig. 23). Connect
T–connector and pressure gauge to the pump and hose
fitting.
CAUTION
Make sure that all hoses are free of the flywheel
after installation.
5. Make sure that traction pedal and lift valve are in neu-
tral and the parking brake is engaged.
6. Operate engine at full speed ( 3200 + 50 RPM ).
7. Pressure gauge should read from 100 to 150 PSI . If
specification is not met, inspect charge relief valve in
traction pump.
8. A dynamic charge pressure test can be performed as
follows:
A. With T–connector and pressure gauge still con-
nected, sit in the operator seat and press the traction
pedal to forward.
B. While machine is moving, monitor the charge
pressure reading on the pressure gauge (do not acti-
vate the lift control while monitoring charge pres-
sure).
C. The charge pressure should drop no more than
15% from initial test reading (Step 7 above). A pres-
sure drop of more than 15% indicates a traction cir-
cuit leak (e.g. a worn or damaged piston pump
and/or wheel motor).
9. Shut off engine.
10.Disconnect gauge and T–connection from the pump
and hose. Reconnect hose to the pump.
1. Traction pump 2. Hose from lift control
Figure 23
2
1
FRONT
Hydraulic System