Adjusting The Caster Pivot Bearing; Servicing The Hydraulic System - Toro Z555 74245 Operator's Manual

6. If more than two threads are showing remove nut and
install washer between hub and nut (Fig. 48).
7. Torque the slotted nut to 125 ft–lb. (170 N⋅m)
(Fig. 48).
8. Tighten nut until the next set of slots line up with the
hole in the shaft (Fig. 48).
9. Replace cotter pin.
Adjusting the Caster Pivot
Bearing
Check after every 500 operating hours or at storage, which
ever comes first.
1. Disengage the PTO, move the motion control levers to
the neutral locked position and set the parking brake.
2. Stop the engine, remove the key, and wait for all
moving parts to stop before leaving the operating
position.
3. Remove dust cap from caster and tighten lock nut
(Fig. 49).
4. Tighten until spring washers are flat and then back off
a 1/4 turn to properly set the pre–load on the bearings
(Fig. 49).
Important
Make sure spring washers are installed
correctly as shown in figure 49.
5. Install the dust cap (Fig. 49).
Figure 49
1. Spring Washers
2. Lock Nut
Servicing the Hydraulic
System
Checking the Hydraulic Fluid
Check the hydraulic fluid level:
3
2
1
M–4640
3. Dust Cap
37
• Before the engine is first started.
• After the first 8 operating hours.
• After every 25 operating hours.
Fluid Type: Mobil 1 15W-50 synthetic motor oil or
equivalent synthetic oil.
Important Use oil specified or equivalent. Other
fluids could cause system damage.
Hydraulic System Oil Capacity: 67 oz. (2.0 l)
Note: There are two ways of checking the hydraulic oil.
One is when the oil is warm and one is when the oil is
cold. The baffle inside the tank has two levels depending
if the oil is warm or cold.
1. Position machine on a level surface and set the parking
brake.
2. Clean area around filler neck of hydraulic tank
(Fig. 50).
1
2
4
Figure 50
1. Cap
2. Baffle
3. Remove the cap from the filler neck. Look inside to
check if there is fluid in the reservoir (Fig. 50).
4. If there is no fluid, add fluid to the reservoir until it
reaches the cold level of the baffle.
5. Run the machine at low idle for 15 minutes to allow
any air to purge out of the system and warm the fluid.
Refer to Starting and Stopping the Engine on page 18.
6. Recheck the fluid level while the fluid is warm. The
fluid should be between cold and hot.
7. If required, add fluid to the hydraulic tank.
Note: The fluid level should be to the top of the hot level
of the baffle, when the fluid is hot (Fig. 50).
8. Install the cap onto the filler neck.
3
m–5615
3. Cold fluid level—full
4. Hot fluid level—full