Procedure for Steering Circuit Relief Pressure Test
Make sure hydraulic oil is at normal operating tem-
1.
perature by operating the machine under load for
approximately ten (10) minutes. Make sure the hydrau-
lic tank is full.
1
2.
lowered and off. Make sure engine is off and the parking
brake is engaged.
Parkmachineonalevelsurfacewiththecuttingdeck
CAUTION
Figure 44
Steering circuit pressure test port
1.
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.
steering circuit pressure test port (Fig. 44).
Connect a 5000 PSI (350 bar) pressure gauge onto
4.
at idle speed. Check for hydraulic leakage at pressure
gauge location and correct before proceeding with test.
After installing pressure gauge, start engine and run
5.
(2870
Move throttle so engine is running at high idle speed
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 may damage the steering control
valve.
6.
mentarily hold the steering wheel against resistance.
Turn steering all the way in one direction and mo-
GAUGE READING TO BE 1300 to 1400 PSI (90 to
96
bar).
7.
8.
Stop the engine and record test results.
If pressure is incorrect, inspect steering relief valve
in control valve (see Steering Control Valve in the Ser-
vice and Repairs section of this chapter). If steering re-
lief valve is operating properly and 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 control valve should be suspected
of wear or damage.
9.
When testing is completed, disconnect pressure
gauge from test port.
Groundsmaster 4100--D/4110--D
Page 4 -- 59
Hydraulic System
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