Procedure for Steering and Lift/Lower Gear Pump
Flow Test
5. Starttheengineandmovethrottletofullspeed(2870
RPM). DO NOT engage the cutting deck.
Output from the steering and lift/lower gear pump sec-
tion is equally divided by a proportional valve to provide
flow to the steering circuit and the lift circuit. To test gear
pump flow, testing of both steering and lift/lower circuits
is required. Total gear pump flow is the combined flow
from the two circuits.
6. While watching pressure gauges, slowly close flow
control valve until 1000 PSI (69 bar) is obtained on
gauge. Verify engine speed continues to be 2870 RPM.
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.
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-
If a pressure of 1000 PSI (69 bar) could not be ob-
2.
lowered and off. Make sure engine is off and the parking
brake is engaged. Raise seat.
Parkmachineonalevelsurfacewiththecuttingdeck
9.
When testing is complete, remove tester and recon-
nect hose to pump fitting.
CAUTION
2
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
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.
4
3.
Withtheengineoffandcuttingdecklowered,discon-
nect the hydraulic hose from the 90o fitting in the third
gear pump section which supplies the steering and lift/
lower circuits (Fig. 43).
1
4.
connected hose. Make sure the tester flow control valve
is OPEN.
Install tester in series between the fitting and the dis-
Figure 43
1.
2.
Gear pump
Fan drive manifold
3.
4.
Steering/lift hose
90o fitting
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.
Groundsmaster 4100--D
Page 4 -- 55
Hydraulic System
| Categories | Lawn Mower Manual, Sprinkler and Irrigation Manuals, Toro Sprinkler and Irrigation Manuals |
|---|---|
| Tags | Toro Groundsmaster 30413, Toro Groundsmaster Groundsmaster 4100 D |
| Download File |
|
| Document Type | Service Manual |
| Language | English |
| Product Brand | Toro. Customer Service Representatives are available by phone:
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| Publisher | toro.com |
| Wikipedia's Page | Toro Company |
| Copyright | Attribution Non-commercial |
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At only 700mm wide the Mini Dumper is even at home on tight access
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mower about the yard. The US will be getting a revised 2011 Jeep Wrangler but the diesel option will not be offered in the United States.