Toro 4045 Installation Instructions Manual page 8

Figure 19
1. T40, T30, and T20 orifices
8. Remove the spring (T30) and supply orifice (T20) from
the control (Figure
9. Clean the sealing surfaces of the pump housing and
control housing
10. Install the control housing onto the pump using the
new gasket.
Important: The control linkage pin on the control
must be inserted into the swash-plate link in the
pump.
Note: Use petroleum jelly to help hold the swash-plate
link in place while the control is installed.
Note: There will be resistance when the front edge
of the control is tilted away from the pump housing if
the control linkage pin is inserted into the swash-plate
link correctly.
Note: If the control linkage pin is not properly
inserted into the swash-plate link, the pump will not
return to neutral and the rotary motor will spin upon
engine startup.
11. Install the 6 retaining bolts; torque the bolts to 16 N-m
(12 lb-ft).
12. Connect the case drain line and check they hydraulic
fluid level; refer to the Operator's Manual for the machine.
13. Connect the wiring harness to the rotary pump control.
14. Wipe up any spilled oil.
15. Start the machine to test the rotary pump.
Note: If the rotary output spins when the machine
is started but the rotation command is not given, the
control linkage pin is not properly inserted into the
swash-plate link. Remove and cap the case drain line
and repeat the above steps.
19).
Checking the Neutral Adjustment
1. Install a 1000 psi gauge in each of the displacement
control ports (M4 and M5).
1. M72 port (adjusting screw) 3. M5 port (displacement
2. M90 port (locknut)
2. Disconnect the electrical connector from the rotary
pump control, start the machine, and bring it to high
idle.
3. Loosen the locknut (M90) with a 10 mm and 13 mm
hex wrench.
4. Using a 3 mm or 4 mm internal hex wrench, rotate
the adjusting screw (M72) clockwise until the pressure
increases in 1 of the pressure gauges.
Note: Note the angular position of the wrench.
5. Rotate the neutral-adjusting screw counterclockwise
until the pressure increases by an equal amount as the
other gauge.
Note: Note the position of the wrench.
6. Rotate the adjusting screw (M72) clockwise half the
distance between the location noted in step (4 or 5).
Note: The gauges should read the same pressure (case
pressure), indicating that the control is in its
position.
7. Hold the neutral-adjusting screw stationary and tighten
the neutral-adjusting locknut to 7 N-m (62 lb-in) for the
6 mm screw or 13 N-m (120 lb-in) for the 8 mm screw.
8. Once the
NEUTRAL
remove the gauges, and remove the gauge ports.
9. Connect the electrical connector to the rotary pump
control.
8
Figure 20
control port)
4. M4 port (displacement
control port)
position is set, stop the engine,
NEUTRAL