HYDRAULICS
4252490-Rev A 6-43
6
Installation Notes
• Ensure new O-ring is in place before installing hose
on fitting.
• Connect hose (2).
• Replace hydraulic oil charge filter. (See “Hydraulic
Oil Charge Filter Assembly” on page 6-59.)
• Refill hydraulic tank. (Refer to “Parts and
Maintenance Manual” for correct oil specifications.)
• Start engine. Check hydraulic system for leaks.
Repair as necessary.
• Check hydraulic oil level and add if necessary.
Gear Pump
Removal and Installation
See Figures 6-42 and 6-43.
1. Park the mower safely. (See “Park Mower Safely” on
page 1-6.)
2. Remove grass catchers (if equipped).
NOTE
Do not swing the arm out or in with cutting units in the
lowered position.
3. Raise the cutting units.
Figure 6-42
4. Remove lynch pin (2) and release latch (3).
5. Grasp handle (1), and swing the rear swing arm (4)
and cutting unit out.
6. Lower the cutting units.
7. Drain hydraulic oil tank. (See “Hydraulic Oil Tank—
Drain Procedure” on page 6-42.)
Figure 6-43
NOTES
• Label all hydraulic hoses and tubes before
disconnecting to ensure correct installation.
• Close all openings with caps or plugs to prevent
contamination.
8. Remove hose (12) from fitting (13).
9. Remove tee fitting (7) from fitting (6).
10. Support gear pump assembly (5).
11. Remove two screws (8) and lock washers (9).
12. Remove gear pump (5).
13. Remove O-ring (10) and coupler (11).
Installation Notes
• Install gear pump by reversing the order of removal.
• Ensure new O-rings are in place before installing
hoses on fittings.
• Replace hydraulic oil charge filter. (See “Hydraulic
Oil Charge Filter Assembly” on page 6-59.)
• Refill hydraulic tank. (Refer to “Parts and
Maintenance Manual” for correct oil specifications.)
• Start engine. Check hydraulic system for leaks.
Repair as necessary.
• Check hydraulic oil level and add if necessary.
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TN3719
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TN3796
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