Groundsmaster 4500 --D/4700--DHydraulic System Page 4 -- 4
Towing Traction Unit
IMPORTANT: If towing limits are exceeded, severe
damage to the piston pump may occur.
If it becomes necessary to tow (or push) the machine,
tow (or push) in a forward direction only, at a speed
below 3 mph (4.8 kph) and for a distance less than 1/4
mile (0.4 km). The piston (traction) pump is equipped
with two (2) bypass valves that need to be turned three
(3) turns counterclockwise before towing or pushing the
machine. The bypass valves are on the top of the piston
pump (Fig. 2). Do not turn bypass valves when engine
is running.
After the machine has been moved, torque the bypass
valves to 52 ft--lb (70 N--m).
See Traction Unit Operator ’s Manual for additional tow-
ing procedures.
IMPORTANT: If the machine must be pushed or
towed in a reverse direction, the check valve in the
rear traction control manifold must be bypassed. To
bypass this check valve, connect a hydraulic hose
between the piston (traction) pump reverse traction
pressure test port and the port located between
ports M8 and P2 on the rear traction control mani-
fold. 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.
1. Bypass valve location
Figure 2
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