Toro Groundsmaster 4500-D Series Service Manual page 157

Procedure for Reverse Traction Circuit Reducing Valve (PR) Pressure Test (continued)
Groundsmaster ® 4500-D/4700-D
19245SL Rev A
7. Release traction pedal to neutral, stop engine and record test results.
g308370
1. Rear traction manifold
2. #6 zero leak plug
8. The pressure reducing valve (PR) is located on the bottom of the rear traction
manifold (Figure 66). If test pressure is incorrect, adjust pressure reducing
valve (PR) (see Adjust Control Manifold Relief Valves in the Adjustments
section of this chapter). Recheck pressure reducing valve pressure after
any adjustment.
Note: The rear traction circuit relief valve (RV) pressure test uses the
same pressure gauge position as used to measure traction circuit pressure
reducing valve (PR) pressure. If necessary, conduct the rear traction circuit
relief valve (RV) pressure test before removing pressure gauge from rear
traction manifold.
9. When testing is completed, disconnect pressure gauge from the installed
diagnostic fitting. Remove diagnostic fitting from manifold and install removed
plug into manifold. Torque plug to 34 N·m (25 ft-lb).
Figure 66
3. Relief (RV) valve
4. Reducing (PR) valve
Page 5–55 Hydraulic System: Testing