Perform the gear pump flow test if you identify a cutting deck (or implement)
raise and lower problem. This test determines if the hydraulic flow from the
gear pump is correct.
Test Procedure
Note:
Over a period of time, the gears and wear plates in the gear pump can
wear. A worn pump may bypass the hydraulic fluid and make the pump less
efficient. After some time, sufficient fluid loss might occur and cause the cutting
deck lift cylinder to operate slowly. Optional hydraulic cylinders and motor, if
equipped, will also lose efficiency. Continued operation with a worn, inefficient
pump can generate excessive heat, cause damage to the seals and other
components in the hydraulic system.
1. Ensure that the hydraulic fluid is at normal operating temperature.
2. Ensure that the traction drive is correctly adjusted for the N
EUTRAL
position.
WARNING
Before disconnecting or doing any work on the hydraulic system,
release all the pressure in the system; refer to
from the Hydraulic System (page 4–11)
.
g033408
Figure 49
1.
Lift control manifold
2.
Hose from the gear pump
3. Park the machine on a level surface, lower the cutting deck (or implement),
shut off the engine, and set the parking brake.
4. Read all Warning, Cautions, and precautions listed at the beginning of this
section.
5. Clean the junction of the hydraulic hose and upper fitting on the front of the
lift control manifold.
6. Disconnect the hydraulic hose from the upper fitting on the front of the lift
control manifold (
). This hose is from the gear pump outlet and
provides fluid flow to the lift control manifold.
7. Install a hydraulic tester (pressure and flow) in series with the gear pump
fitting and disconnected hose. Ensure that the tester flow arrow points from
the pump outlet port and toward the disconnected hose. Ensure that the
flow-control valve on the tester is fully open.
Hydraulic System: Testing the Hydraulic System
Page 4–52
Groundsmaster 7210
16222SL Rev C
Содержание Groundsmaster 7210
Страница 4: ...NOTES Revision History Page 4 Groundsmaster 7210 16222SL Rev C...
Страница 32: ...Specifications and Maintenance Special Tools Page 2 16 Groundsmaster 7210 16222SL Rev C...
Страница 60: ...Diesel Engine Service and Repairs Page 3 28 Groundsmaster 7210 16222SL Rev C...
Страница 74: ...g186588 Figure 27 Hydraulic System Hydraulic Schematics Page 4 14 Groundsmaster 7210 16222SL Rev C...
Страница 196: ...Hydraulic System Service and Repairs Page 4 136 Groundsmaster 7210 16222SL Rev C...
Страница 304: ...Chassis Service and Repairs Page 6 42 Groundsmaster 7210 16222SL Rev C...
Страница 327: ...Drawing 105 7260 Rev E Sheet 1 16222SL Rev C Page A 3 Hydraulic Schematic g186843...
Страница 328: ...Page A 4 16222SL Rev C Drawing 119 4372 Rev C Sheet 1 Electrical Schematic Platform g186842...
Страница 329: ...Drawing 119 4377 Rev C Sheet 1 16222SL Rev C Page A 5 Electrical Schematic Engine g186841...
Страница 330: ...Page A 6 16222SL Rev C Drawing 122 0350 Rev C Sheet 1 of 2 Electrical Schematic Cab 1 of 2 g186839...
Страница 331: ...Drawing 122 0350 Rev C Sheet 2 of 2 16222SL Rev C Page A 7 Electrical Schematic Cab 2 of 2 g186840...
Страница 332: ...Page A 8 16222SL Rev C Drawing 119 4370 Rev E Sheet 1 of 2 Wire Harness Drawing Platform 1 of 2 g186849...
Страница 333: ...Drawing 119 4370 Rev E Sheet 2 of 2 16222SL Rev C Page A 9 Wire Harness Drawing Platform 2 of 2 g186846...
Страница 334: ...Page A 10 16222SL Rev C Drawing 119 4371 Rev G Sheet 1 of 2 Wire Harness Drawing Engine 1 of 2 g186848...
Страница 335: ...Drawing 119 4371 Rev G Sheet 2 of 2 16222SL Rev C Page A 11 Wire Harness Drawing Engine 2 of 2 g186845...
Страница 336: ...Page A 12 16222SL Rev C Drawing 119 4386 Rev A Sheet 1 Wire Harness Drawing Cab Power g186851...
Страница 337: ...Drawing 122 0723 Rev A Sheet 1 of 2 16222SL Rev C Page A 13 Wire Harness Drawing Cab Headliner g186847...
Страница 338: ...Page A 14 16222SL Rev C Drawing 122 0723 Rev A Sheet 2 of 2 Wire Harness Diagram Cab Headliner g186844...
Страница 339: ...Drawing 122 0158 Rev A Sheet 1 16222SL Rev C Page A 15 Wire Harness Drawing Cab Power Point Kit g186852...
Страница 340: ...Page A 16 16222SL Rev C Drawing 108 2099 Rev C Sheet 1 Wire Harness Drawing Auxiliary Power Model 30382 g186850...
Страница 341: ...Drawing 110 1659 Rev A Sheet 1 16222SL Rev C Page A 17 Wire Harness Drawing Light Kit Model 30374 g186853...
Страница 342: ......