Toro 08161SL Service Manual Model 30412 Groundsmaster 4000 D Preface Publication

Procedure for Steering  and Lift/Lower Gear Pump
Flow Test
2
1.
perature by operating the machine for approximately 10
minutes. Make sure the hydraulic tank is full.
Make sure hydraulic oil is at normal operating tem-
3
2.
decks lowered and off. Make sure engine is off and the
parking brake is applied.
Park machine  on  a level  surface with  the cutting
4
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.
1
Figure 43
1.
2.
Gear pump
Fan drive manifold
3.
4.
Steering/lift hose
90o fitting
IMPORTANT: Make sure  that the oil flow  indicator
arrow on the flow gauge is showing that the oil will
flow from the pump section, through the tester and
into the hydraulic hose.
3.
With the engine off and cutting decks lowered, dis-
connect the  hydraulic hose from the  90o fitting in  the
third gear pump section which supplies the steering and
lift/lower circuits (Fig. 43).
4.
connected hose. Make sure the tester flow control valve
is OPEN.
Install tester in series between the fitting and the dis-
IMPORTANT: The pump is a positive displacement
type.  If   pump  flow  is  completely   restricted  or
stopped, damage to the pump, tester or other com-
ponents could occur.
5.
RPM). DO NOT engage the cutting decks.
Starttheengineandmovethrottletofullspeed(2870
6.
control valve  until 1000  PSI (69  bar)  is obtained  on
gauge. Verify engine speed continues to be 2870 RPM.
While watching pressure gauges, slowly close flow
GAUGE READING  TO BE:  Flow approximately 7
GPM (26.3 LPM) at 1000 PSI (69 bar).
7.
8.
tained or flow is lower than 6 GPM (22.3 LPM) (85% of
expected flow), check for restriction in pump intake line.
If intake line is not restricted, consider that gear pump is
worn or damaged.
Stop engine and record test results.
If a pressure of 1000 PSI (69 bar) could not be ob-
9.
When testing is complete, remove tester and recon-
nect hose to pump fitting.
Groundsmaster 4000--D
Page 4 -- 55
Hydraulic System
Product Specification
CategoriesLawn Mower Manual, Sprinkler and Irrigation Manuals, Toro Sprinkler and Irrigation Manuals
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- 298 pages
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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Publishertoro.com
Wikipedia's PageToro Company
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