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Groundsmaster 5900/5910Hydraulic System Page 4 -- 4
Towing Traction Unit
IMPORTANT: If towing limits are exceeded, severe
damage to the piston (traction) pump may occur.
If it becomes necessary to tow or push the machine,
move machine in a forward direction at a speed below
2 mph (3.2 kph), and for a very short distance. If the ma-
chine needs to be moved more than 1/4 mile (0.4 km),
machine should be transported on a trailer. The piston
(traction) pump is equipped with two (2) bypass valves
that must be opened for towing or pushing (Fig. 2).
IMPORTANT: If t he machine must be pushed or
towed in a reverse direction, the check valve in the
4WD control manifold must bebypassed. To bypass
this check valve, connect a hydraulic hose between
the traction pump reverse pressure test port (MA)
and the 4WD control manifold test port (G2) (Fig. 3).
Toro part numbers 95--8843 (hydraulic hose),
95--0985 (coupler fitting) (2 required) and 340--77
(hydraulic fitting) (2 required) are needed for this
connection.
If towing the machine is necessary, use the following
procedure:
1. Locate bypass valves on the traction pump (Fig. 2).
2. Open both bypass valves in traction pump:
A. Loosen the jam nut on bypass valve stem.
B. Thread bypass valve stem in six (6) turns.
C. Tighten the jam nut.
3. Tow or push machine in a forward direction as re-
quired.Makesuretonot exceed speed or distance listed
above.
IMPORTANT: Using the tow option bypasses the
high pressure relief valves. Catastrophic compo-
nent damage can occur if hydraulic traction circuit
empties or overheats.
4. After moving machine, close both bypass valves:
A. Loosen the jam nut on bypass valve stem.
B. Thread bypass valve stem all the way out. Do not
exceed 8 ft--lb (11 N--m) torque to close bypass
valve.
C. Tighten jam nut to secure bypass valve.
1. Forward bypass valve
2. Reverse bypass valve
3. Reverse test port (MA)
Figure 2
2
1
3
1. 4WD manifold reverse test port (G2)
2. Traction pump reverse test port (MA)
3. Hydraulic hose
Figure 3
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2
3