Procedure for System Flow Test:
Make sure hydraulic oil is at normal operating tem-
2
1.
perature by operating the machine for approximately 10
minutes.
3
2.
hicle engine is off and that the parking brake is applied.
Park machine on a level surface. Make sure tow ve-
3.
Read and follow Precautions for Hydraulic Testing.
IMPORTANT: Make sure to thoroughly clean around
all hydraulic connections that will be disassembled.
1
4.
Disconnect hydraulic hose from 45o hydraulic fitting
on the brush motor to allow hydraulic tester (flow meter)
installation (Fig. 17).
5.
Install hydraulic tester (flow meter) between discon-
Figure 21
3.
nected hose and fitting. Make sure that tester flow arrow
points from the hose and into the fitting. Make sure the
flow control valve on the tester is fully open.
1.
2.
Brush motor
Hydraulic hose
45o hydraulic fitting
6.
Start engine on tow vehicle and tow the Topdresser.
Ground Speed
System Flow
Turn the Topdresser control handle switch to the ON
position. While operating the machine, monitor the ve-
hicle speed and the hydraulic tester flow gauge. System
Flow is dependant on ground speed and should be as
shown in the chart to the right (Fig. 22).
2
3
4
5
MPH (3.2 KPH)
MPH (4.8 KPH)
MPH (6.4 KPH)
MPH (8.0 KPH)
1.8 GPM (6.8 LPM)
2.7 GPM (10.2 LPM)
3.6 GPM (13.6 LPM)
4.5 GPM (17.0 LPM)
7.
If system flow is less than specified, consider that
Figure 22
one or both of the wheel motors are worn or inefficient.
It should be noted that if system flow is low, operation of
both the brush motor and the conveyor motor would be
affected.
8.
(flow meter) and connect hose to brush motor fitting.
Make sure hydraulic tank is full.
When testing is complete, remove hydraulic tester
Topdresser 1800 & 2500
Page 3 – 25
Hydraulic System
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