Textron JACOBSEN GP400, Technical/Repair Manual

Page: 224 / 354

6-32 4252490-Rev A
HYDRAULICS
6
Cutting Units Circuit Test
See Figures 6-22 through 6-24.
IMPORTANT
• Performing this test will isolate the gear pump,
reel valve unit, and right reel motor from the rest
of the cutting units circuit.
• This test works together with the gear pump test,
reel valve unit test, and reel motors test to isolate
a problem with the cutting units circuit.
!
WARNING
1. Park the mower safely. (See “Park Mower Safely” on
page 1-6.)
Figure 6-22
2. Disconnect hose (2) from fitting (1).
Figure 6-23
3. Install tee fitting (5) to fitting (1).
4. Connect flow meter inlet hose (6) and hose (2) to tee
fitting (5).
NOTE
Make sure hose end is under oil level in hydraulic tank to
prevent aeration of oil.
5. Secure flow meter outlet hose (3) to hydraulic tank
fillneck.
!
WARNING
6. Install suitable blocking device or tool in right cutting
unit, preventing the reel motor from turning.
7. Open flow meter valve (4) 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
• -8 ORFS Test Hose 4000 psi (276 bar)
• -8 ORFS Tee Fitting
• Blocking Device or Tool
TN3796
2
1
Safely block cutting unit from rotating using a
suitable device or tool. Failure to follow
appropriate safety precautions may result in
death or serious injury.
5
6
TN1363
4
3