caution - Toro
caution - Toro
caution - Toro
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
Procedure for Traction Circuit Reducing Valve (PR)<br />
Pressure Test<br />
1. Make sure hydraulic oil is at normal operating temperature<br />
by operating the machine for approximately 10<br />
minutes. Make sure the hydraulic tank is full.<br />
2. Park machine on a level surface with the cutting deck<br />
lowered and off. Make sure engine is off and the parking<br />
brake is engaged.<br />
C. Recheck reducing valve (PR) pressure setting<br />
and readjust as needed.<br />
9. Disconnect pressure gauge from test port.<br />
1<br />
CAUTION<br />
Prevent personal injury and/or damage to equipment.<br />
Read all WARNINGS, CAUTIONS and Pre<strong>caution</strong>s<br />
for Hydraulic Testing at the beginning<br />
of this section.<br />
3. Connect a 1000 PSI (70 bar) gauge to test port on<br />
4WD control manifold under radiator (Fig. 29).<br />
4. After installing pressure gauge, start engine and run<br />
at idle speed. Check for hydraulic leakage and correct<br />
before proceeding with test.<br />
1<br />
Figure 29<br />
1. 4WD control manifold<br />
2. Pressure test port<br />
2<br />
Hydraulic<br />
System<br />
5. Operate the engine at full engine speed (2870 RPM).<br />
Make sure that transport/4WD switch is in the 4WD position.<br />
6. Sit on seat, apply brakes fully and slowly depress the<br />
traction pedal in the reverse direction. While pushing<br />
traction pedal, look at pressure reading on gauge:<br />
GAUGE READING TO BE 650 PSI (45 bar)<br />
(approximate).<br />
2<br />
Figure 30<br />
1. Manifold: front side 2. Reducing valve (PR)<br />
7. Stop engine and record test results.<br />
8. Pressure reducing valve (PR) is located on the front<br />
side of the 4WD control manifold (Fig. 30). Adjustment<br />
of this valve can be performed as follows:<br />
NOTE: Do not remove the pressure reducing valve<br />
from the hydraulic manifold for adjustment.<br />
A. To increase pressure setting, remove cap on reducing<br />
valve and turn the adjustment socket on the<br />
valveinaclockwisedirection.A1/8turnonthesocket<br />
will make a measurable change in pressure setting.<br />
B. To decrease pressure setting, remove cap on reducing<br />
valve and turn the adjustment socket on the<br />
valve in a counterclockwise direction. A 1/8 turn on<br />
the socket will make a measurable change in pressure<br />
setting.<br />
Groundsmaster 4100--D<br />
Page 4 - 41<br />
Hydraulic System
Change language