Service And Repairs; General Precautions For Removing And Installing Hydraulic System Components - Toro Groundsmaster 4500-D Series Service Manual

Service and Repairs

General Precautions for Removing and Installing Hydraulic System
Components
Before Repair or Replacement of Components
After Repair or Replacement of Components
Groundsmaster ® 4500-D/4700-D
19245SL Rev A
1. Before removing any parts from the hydraulic system, park machine on a
level surface, apply parking brake, lower cutting decks or attachments and
stop engine. Remove key from the ignition switch.
2. Clean machine before disconnecting, removing or disassembling any
hydraulic components. Make sure that all hydraulic components, hose
connections and fittings are cleaned thoroughly. Always keep in mind the
need for cleanliness when working on hydraulic equipment.
Before disconnecting or performing any work on the hydraulic
system, all pressure in the system must be relieved. See
Hydraulic System Pressure (page
3. Put caps or plugs on any hydraulic lines, hydraulic fittings and components
left open or exposed to prevent contamination.
4. Put labels on disconnected hydraulic lines and hoses for proper installation
after repairs are completed.
5. Note the position of hydraulic fittings (especially elbow fittings) on hydraulic
components before removal. Mark parts if necessary to make sure they will
be aligned properly when installing hydraulic hoses and tubes.
1. Check oil level in the hydraulic reservoir and add correct oil if necessary.
Drain and refill hydraulic system reservoir and change oil filters if component
failure was severe or system is contaminated (see
(page 5–91)).
Follow all local codes and regulations when recycling or disposing
hydraulic fluid and filters.
2. Lubricate O−rings and seals with clean hydraulic oil before installing hydraulic
components.
3. Make sure caps or plugs are removed from the hydraulic lines, hydraulic
fittings and components before reconnecting.
4. Use proper tightening methods when installing hydraulic lines and fittings
(see Installing the Hydraulic Fittings (SAE Straight Thread O-Ring Fittings)
(page 5–9) and Installing Hydraulic Hoses and Tubes (O-Ring Face Seal)
(page 5–7)).
5. After repairs, check control linkages or cables for proper adjustment, binding
or broken parts.
6. If piston (traction) pump, front wheel motors or rear axle motor was removed
from machine for service, fill housing through case drain with new hydraulic
WARNING
5–4).
IMPORTANT
Page 5–87
Relieving
Flush Hydraulic System
Hydraulic System: Service and Repairs