Service And Repairs; General Precautions For Removing And Installing The Hydraulic System Components - Toro Greensmaster 3120 Service Manual

Service and Repairs

General Precautions for Removing and Installing the Hydraulic
System Components
Before Repairing or Replacing the Components
After Repairing or Replacing the Components
Greensmaster 3120
17230SL Rev C
1. Before removing any parts from the hydraulic system, park the machine on a
level surface, lower the cutting units, turn the engine OFF, set the parking
brake, and remove the key from the key switch.
2. Clean the machine before you disconnect, remove, or disassemble the
hydraulic components.
Note: Cleanliness is necessary whenever you work on the hydraulic
equipment. Ensure that you clean the hydraulic components, hoses,
connections, and fittings.
3. Label all the disconnected hydraulic lines and hoses for proper installation
after repairs are completed.
4. Note the position of the hydraulic fittings (especially elbow fittings) on the
hydraulic components before removal.
Note: Mark the parts, if necessary before removal and ensure that they are
aligned properly when installing the hydraulic fittings, hoses, and tubes.
Before disconnecting or doing any work on the hydraulic system,
release all the pressure in the system; refer to
from the Hydraulic System (page
5. The hydraulic fluid may be hot. Be careful when you loosen and remove
the hydraulic system components.
6. Install clean caps or plugs on the hydraulic lines, hydraulic fittings, and
components that are left open or exposed to prevent hydraulic system
contamination. Cap the opening as soon as the line or port is exposed.
1. Check the hydraulic-fluid level in the hydraulic tank and add correct quantity
of fluid if necessary. Use the hydraulic fluids that are specified in the traction
unit Operator's Manual.
Drain and fill the hydraulic-system tank and change the hydraulic
fluid filters if the component failure is severe or the system is
contaminated; refer to the traction unit Operator's Manual.
2. Lubricate the O-rings and seals with clean hydraulic fluid before installing
the hydraulic components.
3. Remove all the caps or plugs from the hydraulic tubes, hydraulic fittings, and
components before connecting them again.
4. Use proper tightening procedures when installing the hydraulic hoses and
fittings; refer to Installing Hydraulic Hoses and Tubes (O-Ring Face Seal)
WARNING
4–4).
IMPORTANT
Page 4–71
Relieving Pressure
Hydraulic System: Service and Repairs