Checking Hydraulic Lines And Hoses; Hydraulic System Test Ports; Rear Wheel Toe-In - Toro 03706 Operator's Manual

Checking Hydraulic Lines And
Hoses
Check hydraulic lines and hoses daily for leaks, kinked
lines, loose mounting supports, wear, loose fittings, weather
deterioration and chemical deterioration. Make all
necessary repairs before operating.

Hydraulic System Test Ports

The test ports (Fig. 45 & 46) are used to test the hydraulic
circuits. Check all pressures when engine is at full speed
and hydraulic oil is at normal operating temperature.
Contact your local Toro distributor for assistance.
1. Traction Forward and Reverse (Fig. 45) (behind wheel
motors) has a normal relief setting of approximately
5300 psi and 50 – 150 psi charge pressure. Use a gauge
with 7500 – 10,000 psi full scale rating.
Figure 45
1. Traction forward
2. Cutting unit Counterbalance has adjustable pressure.
Normal Setting
Maximum Hill Climbing Setting
Maximum Quality of Cut Setting
Lift circuit relief pressure is approximately 2650 psi
when counterbalance setting is 550 psi.
Note: Changes in counterbalance setting will effect the lift
circuit relief pressure.
1
2
2. Traction reverse
Hot Oil: 500–550 psi
Cold Oil: 600–650 psi
Hot Oil: 550+ psi
Cold Oil: 650+ psi
Hot Oil: 500 psi
Cold Oil: 600 psi
35
2
5
Figure 46
1. Lift relief circuit
2. Charge pressure circuit
3. Cutting unit
counterbalance
3. Cutting Unit Circuit has a normal relief setting of
approximately 2700–3000 psi.
4. Steering Circuit has a normal relief setting of
approximately 1500 psi.
5. Lift/relief Circuit has a normal relief setting of
approximately 2650–2750 psi.
6. Charge Pressure Circuit has a normal relief setting of
approximately 100–150 psi.
Rear Wheel Toe–in
After every 800 operating hours or annually, check rear
wheel toe–in.
1. Measure center–to–center distance (at axle height) at
front and rear of steering tires (Fig. 47). Front
measurement must be 1/8 in. less than rear
measurement.
1
4
3
4. Cutting unit circuit
5. Steering circuit