39
Lightly coat the charge
pump drive key with pe-
troleum jelly to help hold
it in position during as-
sembly. First install the
drive key in its recess lo-
cated in the charge pump
coupling. Next install the
gerotor star on the charge
pump coupling by aligning with the previously installed drive
key Next install the charge pump coupling assembly and
gerotors outer ring into the pump end cover. (see Figure 108)
Next lightly coat the
charge pump sealing ring
with petroleum jelly and
install it into the pump end
cover. (See Figure 109)
Before installing the
charge pump cover as-
sembly, please note that
there is a small and large
recess cast into the cover
assembly. The large re-
cess side of the charge
pump cover must face to-
ward the charge pump in-
let. (see Figure 110)
Aligning the large recess
in the cover assembly with
the charge pump inlet, in-
stall the charge pump
cover over the coupling
and into the pump end
cover. Install the four re-
taining cap screws. (see
Figure 111)
Using a “T” handle to ro-
tate the charge pump as-
sembly, torque the retain-
ing cap screws to 20 ft.
lbs. [27, Nm] to 24 ft. lbs.
[32,5 Nm] Note: If the
charge pump assembly
does not have a through
shaft, the charge pump
assembly must be rotated from the other side. (see Figure 112)
Repair Information
– Series 2 Variable Displacement Pump
Install the dowel pin in the end
cover. Lightly coat the end cover
side of the valve plate with pe-
troleum Jelly (Vaseline) for re-
tention during assembly. Install
the valve plate over the bearing
cup and aligning with the dowel
pin. (see Figure 113)
Aligning the pump end cover
with the hold down arm assem-
bly alignment tool (2) dowels,
install the end cover. (see Figure
114)
You may have to rotate the
charge pump coupling slightly to
align the splines before the end
cover will set squarely on the
pump housing. Again, if the
charge pump coupling does not
have a through shaft, the pump
input shaft may have to be ro-
tated slightly to align the splines.
(see Figure 115)
With the charge pump coupling,
pump shaft splines aligned,
along with the swashplate hold
down ears and springs aligned
with the recess machined into
the face of the end cover, remove
the four dowel pins and carefully
remove the alignment tool (2)
using caution as not to disturb
the housing gasket and sealing rings. (see Figure 116)
With the hold-down springs
aligned, install the end cover re-
taining cap screws. Torque cap
screw as follows:
Model 39 to 46 • 35 ft. lbs. [47,4
Nm] to 40 ft. lbs. [54 Nm] Model
54 to 64 • 60 ft. lbs. [81,3 Nm]
to 65 ft. lbs. [88,1 Nm]
(see Figure 117)
Figure 111
Figure 112
Figure 108
Figure 110
Figure 109
Figure 113
Figure 114
Figure 115
Figure 116
Figure 117
