HYDROSTATIC POWER TRAIN
673831-Rev A 5-31
5
3WD System Test
See Figures 5-25 through 5-27.
1. Park the mower safely. (See “Park Mower Safely” on
page 1-6.)
2. Before performing this test, perform traction system
test and pump tests.
Figure 5-25
Figure 5-26
The hydraulic system is under pressure, and the
oil will be hot.
• Always relieve pressure in the hydraulic
system before performing service.
• Failure to follow appropriate safety
precautions may result in death or serious
injury.
Required Tools and Materials
• Flow Meter
• -12 ORFS and -10 ORFS Test Hose 6000 psi (413
bar)
• -12 ORFS and -10 ORFS Blocking Disks
• Flow Lock Tool
• Wheel Restraints
15
GPM
20
25
30
1
0
5
0
0
2
0
4
0
6
0
L
P
M
8
0
1
0
0
3000
psi
BAR
0
100
2
0
0
3
0
0
4
0
0
3
6
00
420
0
48
0
0
5
4
0
0
6
0
0
0
2
4
0
0
18
0
0
1
200
6
00
0
250
psi
BAR
0
5
1
0
1
5
2
0
25
3
0
3
5
3
00
350
4
00
4
50
5
0
0
2
0
0
1
50
1
00
5
0
0
12
11
2
4
6
8
10
3
5
1
7
9
13
14
15
16
17
18
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