HYDRAULICS
673831-Rev A 6-39
6
Rear Reel Valve Test
See Figures 6-36 through 6-38.
• Performing this test will isolate the rear reel valve
from the rest of the rear cutting units circuit.
• This test works together with the “Rear Cutting
Units Circuit Test,” “Rear Cutting Units Pump
Test,” and “Rear Reel Motors Test” to isolate a
problem with the rear cutting units circuit.
1. Park the mower safely. (See “Park Mower Safely” on
page 1-6.)
2. Before performing this test, perform “Rear Cutting
Units Circuit Test,” leaving flow meter connected as
outlined.
Figure 6-36
3. Install blocking disk at fitting (1) on right rear reel
motor, blocking oil flow from entering right rear reel
motor.
Figure 6-37
4. Open flow meter valve (2) completely.
Figure 6-38: Rear Reel Valve Test—Blocking Disk at
Right Rear Reel Motor
5. Block both sides of rear wheels using suitable wheel
blocks.
6. Bypass seat switch.
Verify engine rpm is within specification (3000 rpm ± 50)
to ensure accurate hydraulic test results.
7. Start engine and run at full throttle (3000 rpm ± 50).
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
• -6 ORFS Test Hose 4000 psi (276 bar)
• -6 ORFS Tee Fitting
•-8 ORFS Blocking Disk
15
GPM
2
0
25
3
0
1
0
5
0
0
2
0
4
0
6
0
L
P
M
8
0
1
0
0
3000
psi
BAR
0
1
0
0
2
0
0
30
0
4
0
0
3
6
00
420
0
48
0
0
54
0
0
6
00
0
2
4
0
0
18
0
0
1200
6
0
0
0
250
psi
BAR
0
5
1
0
1
5
2
0
2
5
3
0
3
5
3
00
350
4
00
45
0
5
00
2
0
0
1
50
1
00
5
0
0
2
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