Procedure for Traction Pump (P1) Flow Test:
Make sure hydraulic oil is at normal operating tem-
perature by operating the machine for approximately 10
minutes.
11.While holding the traction pedal in full forward, slowly
close flow control valve on tester until pressure gauge
on tester reads 1300 PSI (89.6 bar). As the flow control
valve is being closed, engine speed should decrease to
approximately 2800 RPM (verify engine speed with a
phototac).
1.
2.
Park machine on a level surface with the attachment
removed. Make sure engine is off.
12.Observe
flow gauge. Tester reading should be
approximately 10 GPM (37.9 LPM). Record test results.
3.
4.
tral position and that traction pedal allows full stroke of
the pump lever (see Operator’s Manual).
Read and follow Precautions for Hydraulic Testing.
Make sure that traction pedal is adjusted to the neu-
13.Release
traction pedal, open flow control valve on
tester and turn engine off.
14.If
1300 PSI (tester pressure), 2800 RPM (engine
speed) or 10 GPM flow cannot be achieved, consider
the following:
WARNING
A. The traction pedal and traction speed may need
adjustment (see Operator’s Manual).
Before jacking up the machine, review and follow
Jacking Instructions in Chapter 1 – Safety.
B. If the engine speed drops excessively (below
2800
engine performance should be evaluated (see
Chapter 3 – Gasoline Engine).
RPM) as the tester flow control valve is closed,
5.
Jack up and support machine with blocks or jack
stands so that all three wheels are off the ground. In this
test, the wheels need to spin freely to allow hydraulic
flow through the traction circuit. Make sure that the park-
ing brake is not applied.
C. If engine speed does not drop and pressure and
flow specifications are not met, the hydrostat needs
to be repaired or replaced as necessary.
IMPORTANT: Make sure to thoroughly clean around
all hydraulic connections that will be disassembled.
15.If specifications are met and a traction circuit prob-
lem exists, check wheel motor efficiency (see Wheel
Motor Efficiency Test in this section).
6.
Disconnect hydraulic hose from hydraulic tube lead-
ing to the front wheel motor lower port to allow hydraulic
tester (flow meter) installation (Fig. 22).
16.When testing is complete, lower wheels to the
ground. Remove hydraulic tester and reconnect hydrau-
lic hose to hydraulic tube.
7.
Install hydraulic tester (flow meter) between discon-
nected hose and tube. Make sure that tester flow arrow
points from the hose and into the tube. Make sure the
flow control valve on the tester is fully open.
17.Make sure hydraulic tank is full (see Operator’s
Manual).
8.
at low idle speed. Check for hydraulic leakage and cor-
rect before proceeding with test.
After installing hydraulic tester, start engine and run
9.
Operate engine at full speed (3400 RPM).
CAUTION
1
Use extreme caution when taking gauge read-
ings. The wheels off the ground will be spinning.
2
10.Sit
in the operator seat and slowly push traction ped-
al to the full forward position.
Figure 22
1.
Tube to lower motor port
2.
Hydraulic hose
Sand Pro & Infield Pro 3040/5040
Page 4 – 27
Hydraulic System
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