Bolens QS Series Service Manual page 41

)
DRIVE TRAIN (Continued)
OS, QT & 1900 SERIES.
Page 3-15 REV. 12/78
HYDROSTATIC REPAIR
C. Push shafts from swash-
plate and housing and
remove the swash-
plate.
D. Press the needle bearings
from housing.
4. Remove pump driveshaft.
A.
Remove snap rings.
B. Tap lightly on input end of
pump shaft with a soft
hammer to remove the
bearing and shaft.
C. Press bearing from drive-
shaft.
INSPECTION OF PUMP
SECTION
1. Inspect control and trunnion
shaft bearings and seals.
2. Inspect thrust plate for scratches
or wear. Replace all worn or
damaged parts.
INSPECTING CYLINDER
BLOCK ASSEMBLIES
The pump cylinder block and the
motor cylinder block are identical.
1. Inspect the cylinder blocks for
wear or pickup of foreign
material..
2. Inspect the piston retainer for
straightness. The retainer must
be straight so the piston slipper
surfaces will not wear uneven.
3. Inspect the piston assembly.
The lubricant hole must be free
of obstruction and the slipper
surface even. If the slipper
surface has more than 1 /32"
taper, the cylinder block assem-
bly must be replaced.
Individual parts are not available tor
the cylinder blocks because of the
close tolerances. If any problem is
evident the complete cylinder block
must be replaced.
INSPECT CYLINDER BLOCK
FOR WEAR OR PICK-UP OF
FOREIGN MATERIAL
FIGURE 3-21
FIGURE 3-22
INSPECT SLIPPER
SURFACE FOR
LUBRICANT HOLE MUST
BE FREE OF
OBSTRUCTION
FIGURE 3-23