Wittke FEATHERWEIGHT, Maintenance Manual

Page: 102 / 171

92
Hydraulic System
9. Attach the pump to a lifting device and remove both 5/8” bolts that hold the pump to the pump
support.
10. Remove the pump.
If need be, disconnect the drive shaft from the pump and save it for the replacement pump.
11. Install the new pump.
Before attempting to install the new pump, it is very important to check the port configuration on
that pump; the ports on the replacement pump must be positioned the same way as on the old
pump. If they are not, proceed with the indexing of the new pump.
The replacement pump must be oriented in such a way to facilitate reconnection to the hydraulic
system and attachment to the chassis frame.
Go to
page 86 to know how to index the new pump; procedure begins with Step 12 a.
12.
Reinstall the drive shaft if it has been removed from the engine.
Before proceeding with the installation of the drive shaft apply the following procedure:
12 a.
On the drive shaft mark the location where a hole must be drilled.
Use the yoke as a jig to determine where exactly the hole must be drilled then remove it.
N
OTE
: The yoke must be fully engaged on the shaft before determining the exact location where the
hole must be drilled.
12 b.
Drill a hole with a 5/16” diameter on the drive shaft.
Figure 7 - 8 Depth of hole to be drilled
12 c.
Reinstall the drive shaft.
12 d.
Place the yoke on the shaft as illustrated on page 96.
The yoke must be fully engaged on the shaft with both holes aligned (one hole over the
other).
12 e.
Apply Loctite 243 (medium strength) to bolt threads and insert the bolt firmly into the
holes to properly secure the yoke to the shaft.
12 f.
Install a steel wire on the yoke bolt (the wire must be fixed tight around the bolt)
[see Figure 7 - 11].
13.
Using a suitable lifting device, install the new pump on the pump support.
14. Put both 5/8” bolts back in to secure the pump to the plate.