Toro Multi Pro 5800 Service Manual page 81

The steering and boom lift circuits relief pressure test
should be performed to make sure that the relief pres-
sure for the steering and boom lift circuits is correct.
Procedure for Steering/Boom Lift Circuits Relief
Pressure Test:
1. Make sure hydraulic oil is at normal operating tem-
perature by operating the machine for approximately ten
(10) minutes. Make sure the hydraulic tank is full.
2. Park machine on a level surface, stop engine, en-
gage parking brake and remove key from the ignition
switch. After turning engine off, operate all hydraulic
controls to relieve hydraulic system pressure.
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. Thoroughly clean test port on tee fitting on left side
of rear gear pump section (Fig. 35). Install 5000 PSI (350
bar) pressure gauge to test port fitting.
4. After installing pressure gauge, start engine and run
at low idle speed. Check for hydraulic leakage and cor-
rect before proceeding with test.
5. Adjust engine speed to high idle (3050 to 3150
RPM).
IMPORTANT: Hold steering wheel at full lock only
long enough to get a system pressure reading.
Holding the steering wheel against the stop for an
extended period may damage system components.
Multi Pro 5800
6. Watch pressure gauge carefully while turning the
steering wheel completely in one direction (full steering
lock) and holding momentarily.
7. System pressure should be approximately 1000 PSI
(69 bar) as the relief valve lifts. Return steering wheel to
the neutral position.
8. Slow engine speed and shut off engine. Record test
results.
9. If relief pressure is incorrect, inspect for worn, stuck
or damaged relief valve in gear pump (see Gear Pump
Service in the Service and Repairs section of this chap-
ter). After servicing the valve, retest relief valve pres-
sure.
10.After testing is completed, disconnect pressure
gauge from test port.
3
2
1. Gear pump
2. Steering/boom lift circuit pressure hose
3. Tee fitting
Page 4 - - 43
1
Figure 35
Hydraulic System