Gravely Promaster 400 Service Manual page 28

1
1. Bearing
Figure 30
16.Tilt the swashplate back to its full angle
(15 degrees) and drive the second pin out of the
control shaft until it hits the housing
17.Note the orientation of the swashplate in the
housing and mark the parts accordingly to insure
proper assembly.
18.Drive the control shaft out of the swashplate bore
toward the outside of the housing. Remove the
trunnion shaft in the same manner. The swashplate
can be removed from the housing, Figure 32.
19.Inspect the needle bearing and remove by
pressing toward the outside of the housing if
replacement is necessary.
20.The pump shaft bearing can be removed and
replaced if necessary.
21.Place the swashplate into the housing with the
counterbore for the thrust plate up. Refer to the
previously made assembly marks to insure proper
orientation of the swashplate in the housing.
22.Install the control and trunnion shafts being certain
the control shaft is on the proper side. Align the
holes in the swashplate and shafts.
23.Press the shaft bearing into the housing.
24.Press the needle bearings into each side of the
housing until flush to 1/64" below counterbore for
lip seals.
25.Install new pins (through the swashplate and
shafts. Use two pins on the control shaft, installing
the first pin until the second pin can be started,
then driving in both pins together until the last pin is
1/4" below the swashplate.
26.Install one pin in the trunnion shaft, driving it in until
it is 1/4" below the swashplate.
NOTE: The swashplate should swing freely in the
pump housing to15 degrees each side of center.
27.Press the pump shaft (into the bearing already
assembled in the housing.
28.Press the bearing into the housing. Then press the
motor shaft into the bearing.
2 3
1
1. Pin
2. Swashplate
3. Housing
5
4
1. Needle Bearing
2. Trunnion Shaft
3. Pin
4. Housing
29.Install the fixed swashplate into the counterbore of
the housing. Orient the swashplate so that the
notch is at top and high point of the cam angle is
toward the bottom and install screws.
30.Assemble the cylinder block parts if necessary and
lubricate with clean oil. There is no special
orientation of the piston to bore that needs to be
maintained.
31.Place the housing assembly in a horizontal
position.
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4
3
4. Control Shaft
5. Swashplate
Figure 31
1
2
6
3
5. Control Shaft
6. Bearing
7. Swashplate
Figure 32
5
1
7