Toro 00075SL, Руководство по обслуживанию

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Reelmaster 5500-D Hydraulic System (Rev. C) Page 4 - 28
TEST NO. 1: Traction Circuit Charge Pressure
1. Make sure hydraulic oil is at normal operating tem-
perature by operating the machine for approximately 10
minutes.
2. Make sure machine is parked on a level surface with
the cutting units lowered and off. Make sure engine is
off.
CAUTION
Prevent personal injury and/or damage to equip-
ment. Read all WARNINGS, CAUTIONS, and Pre-
cautions for Hydraulic Testing at the beginning
of this section.
3. Connect a 1000 PSI (70 Bar) gauge onto charge
pressure test port (Fig. 14).
4. Start the engine and put throttle at full engine speed
(3200 RPM) with no load on the system.
GAUGE READING TO BE 120 to 180 PSI (8.3 to 12.4
bar).
5. If there is no pressure, or pressure is low, check for
restriction in pump intake line. Inspect charge relief
valve and valve seat. Charge pressure can be adjusted
by changing shim thickness behind the spring. Check
for sheared charge pump key. Disassemble charge
pump and check for internal damage or worn parts.
6. Also take a gauge reading while operating the ma-
chine in forward and reverse. Start the engine and put
throttle at full engine speed (3200 RPM). Apply the
brakes and push the traction pedal forward, then re-
verse.
GAUGE READING TO BE 120 to 180 PSI (8.3 to 12.4
bar).
7. If pressure is good under no load, but drops below
specification when under traction load, the piston pump
and motor should be suspected of wear and inefficiency.
When the pump and/or motor is worn or damaged the
charge pump is not able to keep up with the internal leak-
age.
1. Charge pressure test
port 2. Oil filter
Figure 14
1
2