HYDRAULICS
4203781 First Edition 6-39
6
16. Calculate right wing cutting unit circuit leakage.
(Step 13 – Step 14 / Step 13 x 100 = Leak
Percentage)
Is right wing cutting unit circuit leakage 10% or
less?
YES The right wing cutting unit circuit is good.
Proceed to “Right Wing Cutting Unit Motors
Test” on page 6-43.
NO Proceed to next question.
Is right wing cutting unit circuit leakage 11% to
20%?
YES The right wing cutting unit circuit is marginal.
Additional testing is required. Proceed to
“Right Wing Cutting Unit Pump Test” on
page 6-39.
NO Proceed to next question.
Is right wing cutting unit circuit leakage 21% or
more?
YES Test individual components in right wing
cutting unit circuit for leakage. Proceed to
“Right Wing Cutting Unit Pump Test” on
page 6-39.
Right Wing Cutting Unit Pump Test
See Figures 6-33 through 6-35.
!
WARNING
1. Park the mower safely. (See “Park Mower Safely” on
page 1-6.)
2. Before performing this test, perform right wing cutting
unit circuit test, leaving flow meter connected as
outlined.
Figure 6-33
Figure 6-34
3. Install blocking disk between hose (1) and tee fitting
(3).
4. Open flow meter valve (2) completely.
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
• -10 ORFS Test Hose 3600 psi (207 bar)
• -10 ORFS Tee Fitting
• -10 ORFS Blocking Disk
TN2237
1
3
TN1363
2
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