Toro Multi Pro 5800 Service Manual page 71

The traction circuit relief pressure test should be per-
formed to make sure that forward and reverse traction
circuit relief pressures are correct.
Procedure for Traction Circuit 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. Clean and disconnect hydraulic pressure hose from
piston pump fitting on right side of pump for function to
be checked (Fig. 26):
Forward pressure hose is upper hose
Reverse pressure hose is lower hose
4. Install T--connector with 10000 PSI (700 bar) pres-
sure gauge between the piston pump fitting and the dis-
connected hose.
5. After installing pressure gauge, start engine and run
at low idle speed. Check for hydraulic leakage and cor-
rect before proceeding with test.
6. Increase engine speed to high idle (3050 to 3150
RPM).
CAUTION
When testing traction circuit relief pressure,
move machine to an open area, away from people
and obstructions.
7. Drive machine to an open area.
8. With seat occupied, apply brakes fully and slowly de-
press the traction pedal in the appropriate direction (for-
ward or reverse). While pushing traction pedal, look at
pressure reading on gauge.
GAUGE READING TO BE:
Forward: maximum of 4000 PSI (276 bar)
Reverse: maximum of 4000 PSI (276 bar)
Multi Pro 5800
9. Release traction pedal and stop engine. Record test
results.
10.If traction pressure is too low, inspect traction pump
relief valves (Fig. 27) (see Piston (Traction) Pump Ser-
vice in the Service and Repairs section of this chapter).
Clean or replace valves as necessary. These cartridge
type valves are factory set and are not adjustable. If re-
lief valves are in good condition, traction pump or rear
wheel motors should be suspected of wear and ineffi-
ciency.
11. After testing is completed, disconnect pressure
gauge from machine and connect hydraulic hose to
pump fitting.
1. Forward fitting (upper)
1. Forward relief valve
Page 4 - - 33
1
2
Figure 26
2. Reverse fitting (lower)
2
Figure 27
2. Reverse relief valve
Hydraulic System
1