Hydrostatic Transaxles
75
790 series lawn tractors come equipped with a Hydro-
Gear model 348-0510 transaxle. See Figure 6.1.
If a warrantable problem occurs in the first two years
of service, the transaxle will be replaced as a unit by an
authorized White dealer, returning the transaxle to MTD for
vendor recovery. It may also be repaired by a Hydro-Gear
authorized MTD dealer under the Hydro-Gear warranty.
If any non-warranty hydrostatic transaxle service is
required, it can be performed by a White or Hydro-Gear
authorized MTD dealer. These transmissions are feasible
to repair, and the repair / replace decision is left to the
judgement of the shop and the customer.
These transaxles frequently last the life of the tractor with no need for service. To help increase the life of the tran-
saxle:
• Clean off accumulated mud or debris to aid cooling.
• Avoid using a pressure washer, as it may force water past the seals, contaminating the fluid.
• Remove the rear wheels annually, clean the axles, and apply a fresh coating of anti-seize compound.
• Keep linkages and brakes properly adjusted.
• Replace the cooling fan promptly if it gets damaged.
• In normal service, do not attempt to drain and fill the transaxle. There is no drain plug.
To check the oil level:
1. Access to the fill plug can be gained by removing the
battery and the tray that supports the battery.
See
Figure 6.2.
2. Disconnect the negative (black) cable first, and
reconnect it last when the battery is reinstalled.
3. After both cables are removed using a pair of 7/16”
wrenches, remove the battery hold-down.
4. Carefully lift-out the battery.
5. Remove the battery tray.
Figure 6.1
Figure 6.2
CHAPTER 6: HYDROSTATIC TRANSAXLE
FOR DISCOUNT PARTS CALL 606-678-9623 OR 606-561-4983
www.mymowerparts.com
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