Toro Multi Pro 5800 Service Manual page 77

The charge pump flow test should be performed to make
sure that the traction charge circuit has adequate hy-
draulic flow.
Procedure for Charge Pump Flow 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 tee fitting and hydraulic hose at
front of charge circuit oil filter under the hydraulic reser-
voir.
IMPORTANT: Make sure that the oil flow indicator
arrow on the flow meter is showing that the oil will
flow from the pump (disconnected hose), through
the tester and into the oil filter (tee fitting).
4. Install tester with pressure gauge and flow meter in
series with the tee fitting and the disconnected hose.
Make sure the tester flow control valve is fully open.
5. Start engine and run at low idle speed. Check for any
hydraulic leakage from tester and hose connection. Cor-
rect any leaks before proceeding.
6. Move throttle so engine is running at high idle speed
(3050 to 3150 RPM).
Multi Pro 5800
7. Have second person carefully watch pressure gauge
on tester while slowly closing the flow control valve until
400 PSI (28 bar) is obtained. Verify with a phototac that
the engine speed is still 3050 to 3150 RPM.
NOTE: If engine speed drops below 3050 RPM, pump
flow will decrease.
8. Observe flow gauge. Flow indication should be
approximately 4.5 GPM (17 LPM).
9. Release traction pedal to the neutral position, open
flow control valve on tester and shut off engine. Record
test results.
10.If flow is less than 4 GPM (15 LPM), check for restric-
tion in pump suction line. If suction line is not restricted,
the charge pump in the piston (traction) pump assembly
needs to be repaired or replaced as necessary (see Pis-
ton (Traction) Pump Service in the Service and Repairs
section of this chapter).
11. When testing is complete, disconnect tester from tee
fitting and machine hydraulic hose. Reconnect machine
hydraulic hose to tee fitting.
1
1. Charge circuit oil filter
2. Tee fitting
Page 4 - - 39
3
2
Figure 31
3. Hydraulic hose
Hydraulic System