Procedure for Steering Control Valve Test:
Make sure hydraulic oil is at normal operating tem-
5. If either of these performance tests indicate a steer-
ing problem, determine if the steering cylinder is faulty
using the following procedure.
1.
perature.
A. Park machine on a level surface with the cutting
unitsloweredandoff.Makesureengineisoffandthe
parking brake is engaged.
2.
Pressure and Gear Pump (P2) Flow tests to make sure
that pump and relief valve are functioning correctly.
Perform the Lift and Steering Control Valve Relief
B. Turn the steering wheel all the way to the left
(counterclockwise) sothesteering cylinder rod isful-
ly extended.
NOTE: This steering test procedure will be affected by
incorrect rear tire pressure, binding in the hydraulic
steering cylinder, extra weight on the vehicle and/or
binding of the steering fork assembly. Make sure that
theseitems arechecked before proceeding with anyhy-
draulic testing procedure.
C. Read Precautions for Hydraulic Testing.
D. Remove hydraulic hose fromthe90ofittingonthe
rod end of the steering cylinder. Plug the end of the
hose.
3.
Drive machine slowly in a figure eight on a flat level
surface.
E. With the engine off, continue turning the steering
wheel to the left (counterclockwise) with the steering
cylinder fully extended. Observe the open fitting on
the steering cylinder as the wheel is turned. If oil
comes out of the fitting while turning the steering
wheel to the left, the steering cylinder has internal
leakage and must be repaired or replaced.
A. There should be no shaking or vibration in the
steering wheel or rear wheel.
B. Steering wheel movements should be followed
immediately by a corresponding rear wheel move-
ment without the steering wheel continuing to turn.
4.
wheel with small quick movements in both directions.
Let go of the steering wheel after each movement.
Stop unit with the engine running. Turn steering
F. Remove plug from the hydraulic hose. Recon-
nect hose to the steering cylinder fitting.
6.
If steering problem exists and steering cylinder
A. The steering control valve should respond to
each steering wheel movement.
testedacceptably,steeringcontrolrequiresservice(see
Steering Control Valve and Steering Control Valve Ser-
vice in the Service and Repairs section).
B. Whensteeringwheelisreleased,steeringcontrol
should return to the neutral position with no addition-
al turning.
Groundsmaster 3505--D
Page 4 -- 49
Hydraulic System
| Categories | Lawn Mower Manual, Sprinkler and Irrigation Manuals, Toro Sprinkler and Irrigation Manuals |
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| Tags | Toro Groundsmaster 3505 D |
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| Document Type | Service Manual |
| Language | English |
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