HYDRAULICS
673831-Rev A 6-49
6
Repair
Hydraulic Oil Tank—Drain Procedure
See Figure 6-51.
1. Park the mower safely. (See “Park Mower Safely” on
page 1-6.)
2. Raise the hood.
Figure 6-51
• Label all hydraulic hoses and tubes before
disconnecting to aid in installation.
• Close all openings with caps or plugs to prevent
contamination.
• Have a #16 cap available to seal the gear pump
suction manifold.
• The hydraulic oil tank capacity is 7.5 gal (28.4 L).
Use appropriate containers when draining hydraulic
oil.
3. Place a suitable container beneath gear pump
suction manifold (2) and hose (1).
4. Disconnect hose (1), and cap the end of the suction
manifold (2).
5. Loosen the hydraulic oil tank cap to provide a vent for
draining oil.
Installation Notes
• Ensure new O-ring is in place before installing hose
on suction manifold.
• Connect hose (1). Tighten connection to 95 lb-ft (129
N·m)
• Replace charge pressure filter. (See “Charge
Pressure Filter” on page 6-58.)
• Refill hydraulic tank. (Refer to “Safety, Operation, and
Maintenance Manual” for 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 6-52 and 6-53.
1. Park the mower safely. (See “Park Mower Safely” on
page 1-6.)
2. Raise the hood.
3. Drain hydraulic oil tank. (See “Hydraulic Oil Tank—
Drain Procedure” on page 6-49.)
Figure 6-52
• Label all hydraulic hoses and tubes before
disconnecting to aid in installation.
• Close all openings with caps or plugs to prevent
contamination.
4. Disconnect suction manifold (1) from 45° fittings (2).
Remove 45° fittings.
5. Disconnect hoses (3, 4 and 5).
6. Remove straight fittings (6).
7. Note orientation and remove 45° fitting (7)
8. Support gear pump (8).
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