Procedure for Traction Circuit Relief Pressure Test
Make sure hydraulic oil is at normal operating tem-
9. When testing is completed, disconnect pressure
gauge from test port.
1.
perature by operating the machine for approximately 10
minutes. Make sure the hydraulic tank is full.
2
CAUTION
1
Movemachinetoanopenarea,awayfrompeople
and obstructions.
2.
turn the engine off and engage the parking brake.
Drive machine to an open area, lower cutting deck,
Figure 22
1.
Forward traction port
2.
LH front tire
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.
1
3.
cuit test port for function to be checked (Forward or Re-
verse: Fig. 22 or 23).
Connecta10,000PSI(700bar)gaugetotractioncir-
4.
at idle speed. Check for hydraulic leakage and correct
before proceeding with test.
After installing pressure gauge, start engine and run
Figure 23
1.
Reverse traction port
2.
RH front tire
5.
sure that transport/4WD switch is in the transport posi-
tion.
Operate the engine at full speed (2870 RPM). Make
RIGHT
FRONT
2
6.
traction pedal in the appropriate direction. While pu-
shing traction pedal, look at pressure reading on gauge:
Siton seat,apply brakes fully andslowly depress the
GAUGE READING TO BE:
Forward: 3750 to 4250 PSI (259 to 293 bar)
Reverse: 4750 to 5250 PSI (328 to 362 bar)
3
7.
Release traction pedal and stop engine. Record test
results.
1
8.
If traction pressure is too low, inspect traction pump
reliefvalves (Fig.24).Clean orreplace valves asneces-
sary.These cartridge type valves are factory set andare
notadjustable.Ifreliefvalvesareingoodcondition,trac-
tion pump or wheel motors should be suspected of wear
and inefficiency.
Figure 24
1.
2.
Forward relief valve
Reverse relief valve
3.
Traction pump
NOTE: Seal leakage across pilot directional valves
PD1 and PD2 in 4WD manifold can also cause low for-
ward traction pressure with reverse pressure meeting
specifications.
Groundsmaster 4100--D
Page 4 -- 35
Hydraulic System
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|---|---|
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|
| Document Type | Service Manual |
| Language | English |
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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.