Toro Reelmaster 7000-D Service Manual page 143

Steering/Lift Circuit − Steering Cylinder Test
Unit steering performance will be affected by incorrect
rear tire pressure, binding in the hydraulic steering cylin-
der, extra weight on the vehicle, and/or binding of the
steering fork assembly. Make sure that these conditions
are checked and functioning properly before proceeding
with any steering system hydraulic testing.
Special Equipment Required:
S Hydraulic Plug − 11/16 − 16
1. Make sure hydraulic oil is at normal operating tem-
perature by operating the machine under load for
approximately ten (10) minutes. Make sure the hydrau-
lic tank is full.
2. Park machine on a level surface with the cutting units
lowered and the reel enable/disable switch in the DIS-
ABLE position. Turn the steering wheel to the right
(clockwise) until the steering cylinder is fully extended.
Turn engine off and apply the parking brake.
CAUTION
Prevent personal injury and/or damage to equip-
ment. Read all WARNINGS, CAUTIONS and Pre-
cautions for Hydraulic Testing at the beginning
of this section.
3. Thoroughly clean the area around the hydraulic hose
at the rod end of the steering cylinder.
4. Place a drain pan under the steering cylinder. Re-
move hydraulic hose from the fitting on the rod end of the
steering cylinder (Fig. 41). Install a hydraulic plug in the
disconnected hose.
5. Remove all hydraulic oil from drain pan. Make sure
that empty drain pan remains under the open fitting of
the steering cylinder.
6. With the engine off, continue turning the steering
wheel to the right (clockwise) with the steering cylinder
fully extended. Observe the open fitting on the steering
cylinder as the wheel is turned. If hydraulic fluid comes
out of the fitting while turning the steering wheel to the
right, the steering cylinder has internal leakage and
must be repaired or replaced (see Steering Cylinder in
this chapter).
Reelmaster 7000−D
1. Steering cylinder
7. After testing is completed, remove plug from the hy-
draulic hose. Connect hose to the steering cylinder fit-
ting.
8. If a steering problem exists and the steering cylinder
tested acceptably, consider the following:
A. Gear pump section P4 (steering, lift, and charge
circuits) is worn or damaged (see Gear Pump Flow
Test in this chapter).
NOTE: If gear pump P4 is worn or damaged,
charge, steering and lift circuits will all be affected.
B. The flow divider in the fan control manifold is
faulty (see Fan Control Manifold Service in this chap-
ter).
C. The steering control valve requires service (see
Steering Control Valve in this chapter).
9. Check oil level in hydraulic reservoir and adjust if
needed.
10.Operate machine and check for leaks.
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2
Figure 41
2. Rod end fitting
Hydraulic System