Toro 03116SL Rev E Service Manual Groundsmaster 4100 D Preface Publication

Procedure for Steering Circuit Relief Pressure Test
Make sure hydraulic oil is at normal operating tem-
1.
perature by operating the machine for approximately 10
minutes. Make sure the hydraulic tank is full.
2.
decks lowered and off. Make sure engine is off and the
parking brake is engaged.
Park machine  on  a level  surface with  the cutting
1
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.
Figure 30
Steering circuit pressure test port
1.
3.
Connecta5000PSIgaugeontosteeringcircuitpres-
sure test port (Fig. 30).
4.
at idle speed. Check for hydraulic leakage and correct
before proceeding with test.
After installing pressure gauge, start engine and run
1
5.
Operate the engine at full engine speed (2730 + 30
RPM).
IMPORTANT: Hold steering  wheel at full lock  only
long  enough  to get  a  system  pressure  reading.
Holding the steering wheel against the stop for an
extended period will damage the steering motor.
2
6.
mentarily hold the steering wheel against resistance.
Turn steering all  the way in one direction  and mo-
GAUGE READING TO BE 1350 + 50 PSI.
Figure 31
7.
8.
Stop the engine. Record test results.
1.
Steering tower
2.
Steering relief valve
If pressure is incorrect, inspect steering relief valve
(Fig.31).Ifsteeringreliefvalveisoperatingproperlyand
if lift/lower problems  also exist, gear  pump should be
suspected of  wear and  inefficiency. If steering  wheel
continues to  turn at end of  cylinder travel (with  lower
than normal effort), steering cylinder  or steering valve
should be suspected of wear or damage.
9.
Disconnect pressure gauge from test port.
Groundsmaster 4100--D
Page 4 -- 37
Hydraulic System
Product Specification
CategoriesLawn Mower Manual, Sprinkler and Irrigation Manuals, Toro Sprinkler and Irrigation Manuals
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Document TypeCatalog
LanguageEnglish
Product BrandToro. Customer Service Representatives are available by phone: Monday - Friday 7:30 a.m. to 9:00 p.m. (CDT) - Saturday 8:00 a.m. to 8:00 p.m. (CDT) - Sunday 10:00 a.m. to 8:00 p.m. (CDT)
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