Toro Groundsmaster 3280-D Service Manual page 212

Removing the Lift Control Valve
Hydraulic System: Service and Repairs
g230841
1. Lift control valve
2. Hydraulic adapter
3. Hydraulic tube
Note: Early machines came fitted with a lift control valve that incorporated
the counterbalance valve
numbers below 311000000) or early machines that have been updated), the
counterbalance valve is located in a separate manifold
lift valve configuration used before servicing the lift valve.
1. Park the machine on a level surface, engage the parking brake, lower the
cutting deck (or implement), and shut off the engine. Remove the key from
the key switch.
2. Read the General Precautions for Removing and Installing the Hydraulic
System Components (page
3. Remove fuel tank from machine; refer to
3–10) or Removing the Fuel Tank (page
4. Label all hydraulic connections for assembly purposes. Clean hydraulic hose
ends prior to disconnecting the hoses.
Operate all hydraulic controls to relieve system pressure and avoid
injury from pressurized hydraulic fluid.
5. Disconnect hose connections from hydraulic fittings on lift control valve.
Allow hoses to drain into a suitable container.
6. Put caps or plugs on disconnected hoses and fittings to prevent
contamination.
7. Remove cotter pin (item 14 in
control valve.
8. Remove 2 bolts (item 11 in
that secure lift control valve to machine
9. Remove control valve from the machine.
10. Remove hydraulic fittings as necessary from the control valve. Discard all
removed O-rings
Figure 103
4. Counterbalance manifold
5. Hydraulic fitting
6. Bolt (2 each)
(Figure 102). On later machines (machine serial
5–77).
Removing the Fuel Tank (page
4–16).
CAUTION
Figure 102) and pin that secure link tube to
Figure 102), 2 lock washers, and 2 flat washers
Page 5–128
7. Lock washer (2 each)
8. Flat washer (2 each)
(Figure 103). Check the
Groundsmaster ® 3280-D/3320
05138SL Rev B