6-32 673831-Rev A
HYDRAULICS
6
9. Engage the mow switch, engage and release the
lift/lower joystick to the lower position twice, and
operate the reels.
10. Slowly close flow meter valve (2) until a pressure of
1650 psi (114 bar) or 75% of the relief valve rating is
reached. Read and record the front reel valve loaded
flow.
11. Open flow meter valve, disengage mow switch, and
stop engine.
12. Calculate front reel valve leakage.
(Step 10 of previous test – Step 10 / Step 10 of
previous test x 100 = Leak Percentage)
Is front reel valve leakage 10% or less?
YES The front reel valve is good. Proceed to
step 13.
NO Proceed to next question.
Is front reel valve leakage 11% to 20%?
YES The front reel valve is marginal. Additional
testing is required. Proceed to step 13.
NO Proceed to next question.
Is front reel valve leakage 21% or more?
YES Repair or replace reel valve. See “Reel
Valves” on page 6-55, then proceed to
step 13.
13. (See Figure 6-22.) Disconnect hydraulic hose at
fitting (1) on right front reel motor and remove
blocking disk.
14. Reconnect hydraulic hose to right front reel motor.
15. Proceed to “Front Reel Motors Test” on page 6-32.
Front Reel Motors Test
See Figures 6-25 through 6-28.
• Performing this test will isolate the front reel
motors from the rest of the front cutting units
circuit.
• This test works together with the “Front Cutting
Units Circuit Test,” “Front Cutting Units Pump
Test,” and “Front Reel Valve Test” to isolate a
problem with the front cutting units circuit.
1. Park the mower safely. (See “Park Mower Safely” on
page 1-6.)
2. Before performing this test, perform “Front Reel Valve
Test,” leaving flow meter connected as outlined.
3. Install suitable blocking device or tool in right front
cutting unit, preventing the reel motor from turning.
4. Block both sides of rear wheels using suitable wheel
blocks.
5. Bypass seat switch.
Figure 6-25
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
• Blocking Device or Tool
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
00
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
0
0
0
250
psi
BAR
0
5
1
0
1
5
2
0
25
3
0
3
5
3
00
350
4
00
4
5
0
5
0
0
2
0
0
1
50
1
00
5
0
0
1
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