Toro Sand Pro 5040 Service Manual page 59

Procedure for Charge Pump (P2) Flow Test:
1. Make sure hydraulic oil is at normal operating tem-
perature by operating the machine for approximately 10
minutes.
2. Park machine on a level surface with the attachment
lowered. Make sure engine is off and that the parking
brake is applied.
3. Read and follow Precautions for Hydraulic Testing.
4. Make sure that traction pedal is adjusted to the neu-
tral position (see Operator's Manual).
IMPORTANT: Make sure to thoroughly clean around
all hydraulic connections that will be disassembled.
5. Disconnect hydraulic hose from the fitting on the low-
er right side of the hydrostat (Fig. 26 or 27).
6. Install hydraulic tester (flow meter) in series with the
disconnected hose and the fitting on the hydrostat.
Make sure the tester flow arrow points away from the hy-
drostat. Make sure the flow control valve on the test-
er is fully open.
7. Make sure that traction pedal and lift control lever are
in neutral and the parking brake is applied.
8. Start engine and run at low idle speed. Check for hy-
draulic leakage and correct before proceeding with test.
9. Operate engine at full speed (3400 RPM).
10.Slowly close the flow control valve on the tester until
500 PSI (34.5 bar) is obtained.
11. Using a phototac, verify that pump hub speed is 3400
RPM.
12.Flow indication on tester should be a minimum of 2
GPM (7.6 LPM). Record test results.
13.Open the flow control valve on the tester and shut off
engine.
14.If flow is less than 2 GPM (7.6 LPM) or 500 PSI (34.5
bar) can not be obtained, check for restrictions in the
pump circuit. If pump circuit is not restricted, repair or re-
place charge pump (see Sauer–Danfoss (Sundstrand)
15 Series Service Manual at the end of this chapter).
15.Disconnect tester from the hydraulic hose and hy-
drostat fitting. Reconnect hose to fitting (Fig. 26).
16.Make sure hydraulic tank is full (see Operator's
Manual).
Sand Pro & Infield Pro 3040/5040
SP/IP 3040
1
2
1. Hydraulic hose
2. Hydrostat fitting
1
4
3
1. Hydrostat (from below)
2. Hydrostat tee fitting
Page 4 – 31
3
Figure 26
3. Traction rod
SP/IP 5040
2
Figure 27
3. Hydraulic hose
4. Traction rod
Hydraulic System