Testing; Precautions For Hydraulic Testing - Toro Groundsmaster 4500-D Series Service Manual

Testing

Precautions for Hydraulic Testing

Groundsmaster ® 4500-D/4700-D
19245SL Rev A
The most effective method for isolating problems in the hydraulic system is by
using hydraulic test equipment such as pressure gauges and flow meters in the
circuits during various operational checks (see the
All obvious areas such as hydraulic oil supply, oil filters, binding
components, loose fasteners or improper adjustments must be
checked before assuming that a hydraulic component is the source
of the problem.
Failure to use gauges with recommended pressure (bar/PSI) rating
as listed in test procedures could result in damage to the gauge and
possible personal injury from leaking hot oil.
Keep body and hands away from pin hole leaks or nozzles that eject
hydraulic fluid under high pressure. Do not use hands to search
for leaks; use paper or cardboard. Hydraulic fluid escaping under
pressure can have sufficient force to penetrate the skin and cause
serious injury. If fluid is injected into the skin, it must be surgically
removed within a few hours by a doctor familiar with this type of
injury. Gangrene may result from such an injury.
Before disconnecting or performing any work on the hydraulic
system, all pressure in the system must be relieved. See
Hydraulic System Pressure (page
All testing should be performed by two (2) people. One person
should be in the seat to operate the machine, and the second person
should read test instruments and record test results.
1. Clean machine thoroughly before disconnecting or disassembling any
hydraulic components. Always keep in mind the need for cleanliness when
working on hydraulic equipment. Contamination will cause excessive wear
of components.
2. Before conducting a hydraulic test, make sure hydraulic oil is at normal
operating temperature by operating the machine under load for approximately
ten (10) minutes.
3. Check control linkages for improper adjustment, binding or broken parts.
IMPORTANT
CAUTION
WARNING
5–4).
CAUTION
Page 5–43
Special Tools (page 2–16)).
Relieving
Hydraulic System: Testing