Procedure for Charge Pump (P2) Flow Test:
Make sure hydraulic oil is at normal operating tem-
SP/IP 3040
1.
perature by operating the machine for approximately 10
minutes.
2.
lowered. Make sure engine is off and that the parking
brake is applied.
Park machine on a level surface with the attachment
1
3
3.
4.
Read and follow Precautions for Hydraulic Testing.
Make sure that traction pedal is adjusted to the neu-
tral position (see Operator’s Manual).
2
IMPORTANT: Make sure to thoroughly clean around
all hydraulic connections that will be disassembled.
Figure 26
1.
2.
Hydraulic hose
Hydrostat fitting
3.
Traction rod
5.
er right side of the hydrostat (Fig. 26 or 27).
Disconnect hydraulic hose from the fitting on the low-
6.
Install hydraulic tester (flow meter) in series with the
1
SP/IP 5040
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.
4
8.
draulic leakage and correct before proceeding with test.
Start engine and run at low idle speed. Check for hy-
3
2
9.
Operate engine at full speed (3400 RPM).
close the flow control valve on the tester until
Figure 27
10.Slowly
500
1.
2.
Hydrostat (from below)
Hydrostat tee fitting
3.
4.
Hydraulic hose
Traction rod
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
engine.
the flow control valve on the tester and shut off
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
Manual).
sure hydraulic tank is full (see Operator’s
Sand Pro & Infield Pro 3040/5040
Page 4 – 31
Hydraulic System
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