28
Motor Shaft/Center Case Assembly
1. Apply a film of clean oil to the machined surface of the
Center Case and to the mating surface of the Cylinder
Block.
(Fig. 32)
Fig. 32, Machined Surfaces–Center Case/Cyl. Blk
2. Align the Motor Shaft with the bushing in the Center
Case and press together.
(Fig. 33)
Care should be taken when handling the Cen-
ter Case to avoid any possibility of damage. Also,care
should be taken while compressing pistons in the Cyl-
inder Block. If pressure is relaxed during assembly, the
pistons may eject from the Cylinder Block. Thus, caus-
ing damage to the pistons and making it necessary to
replace the entire assembly.
Fig. 33, Hydrostatic Motor Assembly
3. Install the Motor Shaft and Center Case assemblies into
Upper Case as a single unit.
(Fig. 35)
This may be the most difficult procedure in the
entire assembly of the Transaxle, if not the most critical.
For this assembly to go smoothly several things need to
occur simultaneously;
◆
Pay particular attention to install motor housing in
same orientation that it was removed with recesses
(dimples) facing up. Incorrect installation will result in
improper operation of transaxle.
◆
Align Seal, Bearing and Motor (Swash Plate) Hous-
ing with Upper Case grooves.
◆
Align the (2) Center Case Alignment Pins with Upper
Case mounting holes as the Motor Shaft and Center
Case Assemblies are squeezed together. Verify that
tab on bottom of Motor Housing slips into slot of Upper
Case. Press down on Center Case until Alignment Pins
are securely seated.
A Pilot Hole on Center Case aids in the aligning
of Center Case and the Pump Shaft.
4. Install (2) 10 mm Bolts and tighten with fingers.
(Fig. 34)
Fig. 34, Center Case Mounting
