125816 4-11 REV B
Pump Replacement:
1. Raise the rear of the mower and block with certified
jack stands. The rear wheels need to be able to rotate
freely and clear of all obstructions.
2. Chock the front tires.
3. Raise the seat platform and disconnect the mower
harness from the seat switch. Bypass the seat switch
by connecting the two mower harness female spade
connectors together. Figure 4-25
4. Before installing pump on machine, (either new or
rebuilt) fill pump case with fresh, clean oil by removing
case drain plug and add 6 - 8 oz. of 15W50 synthetic
oil or 20W50 synthetic oil (Hustler
®
Full Synthetic
20W50 Hydrostatic Transmission Oil is
recommended), then install the hose fitting.
Figure 4-26
5. Install pump on machine and install lines.
6. Left Side Pump Replacement Only – Install the Super
104™ Filter Flush Kit (part number 122756) per the kit
instructions.
Install the lower implement circuit gauge kit (part
number 607464).
Do not follow the flushing procedures in the
instructions at this time.
7. Check reservoir for contamination, metal particles, dirt,
water, etc. and clean if necessary. Replace hydraulic
filter and fill reservoir with oil until it is just below the
reservoir neck.
8. Do not open tow valves.
9. Place the steering control levers in the neutral
position.
10. Set engine throttle to the half throttle position.
11. Start engine. Run at idle for 30 seconds.
12. Stroke steering control lever to the forward position.
NOTE: If wheel motor does not rotate in 15 seconds,
return steering control lever to neutral and shut off
engine. Check hydraulic oil level and replenish if needed.
Repeat steps 8 through 11.
13. After wheel motor starts to rotate, increase engine
speed to half throttle and stroke the steering control
lever forward and reverse several times until the wheel
motor operates smoothly through the entire speed
range.
Right side pump as viewed from rear of mower
A. Bypass valve B. Top of pump
Figure 4-24
This procedure will require that the unit to be
raised and blocked up off of the ground. It is
necessary for the wheels to rotate without coming
in contact with the floor or any object that would
permit the unit to propel itself. Stay clear and
exercise caution when rotating wheels to prevent
injury. Use only appropriate vehicle stands, with a
minimum weight rating of 2000 pounds to block
the unit up. Use in pairs only. Follow the
instructions supplied with the vehicle stands.
Untrained maintenance personnel should never
attempt to make any adjustments or repairs to the
mower’s drive system while the engine is running.
The following procedures should be performed by
trained maintenance personnel only.
C. Seat switch
D. Female spade connectors
E. Mower harness
Figure 4-25
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