27
Tuff Torq K61 Hydrostatic Transaxle
Center Case Assembly
The Center Case Assembly is comprised of several internal
parts (Sleeve Assembly) that are not serviced separately.
Other unserviceable parts include the Push Pins, Springs
and Valves. Although, these parts are also considered
to be internal, they will, unlike the Sleeve Ass’y, eject
during handling. So, great care should be taken not to
lets components get away during the handling of the
Center Case.
(Fig. 29)
Care should be
taken when handling the Cen-
ter Case Assembly. Any damage to its machined sur-
faces or internal components will result in the necessity
to replace the entire assembly.
(Fig. 29, 31)
Center Case Assembly:
•
(2) Shaft Bushings
•
(2) Alignment Pins
•
(2) Push Pin Assemblies
•
(2) Sleeve Assemblies
Sleeve Assembly (Not Illustrated):
•
(2) Pin Holders
•
(2) Ball Springs
•
(2) Ball Holders
•
(2) Balls
•
(2) Back-Up Rings
•
Sleeve “A1” (with orifice)
•
Sleeve “A2”
Fig. 29, Center Case Assembly
Apply a light coating of oil to the Push Pins,
Valves, Alignment Pins, and the Machine surfaces of
the Center Case.
(Fig. 29, 30)
Fig. 30, Center Case Machined Surfaces
If Sleeves are removed, it is important that the
Sleeve with the orifice be reinstalled in the same valve
port it was removed from. Failure to install Sleeves in
their correct location will result in the improper opera-
tion of the Transaxle.
(Fig. 31)
Fig. 31, Center Case Sleeve Placement
To avoid possible damage to the Push Pins,
Springs, and/or Bypass Valves, these components
should be installed after the Center Case has been se-
cured into the Upper Case. To do otherwise could result
in the items ejecting from valve causing their loss or
damage.
