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Repair Information
– Series 2 Variable Displacement Pump
Shown here are all the parts used
in the internal pressure override.
Valve plug, shims spring end and
valve poppet. (See Figure 14)
NOTE: The internal pressure override valve setting can be changed
simply by adding or deleting shims.
Next, using a 1-1/4 in. socket or
end wrench, remove the charge
pressure relief valve plug and
valve spring and valve poppet
from the pump housing. (see
Figure 15)
Shown here are all the parts used
in the charge pressure relief
valve. Plug, shims, valve spring
and valve poppet. The charge
pressure relief valve setting can
be changed simply by adding or
deleting shims. (see Figure 16)
Note: Some models use a single
charge pressure relief valve car-
tridge.
Next, using a 5/16 in. hex key or
allen wrench remove the auxil-
iary pump mounting flange re-
taining cap screws. With the
retaining cap screws removed,
remove the mounting flange
from the pump end cover (see
Figure 17)
Turn the auxiliary pump adapter
over and using an O-Ring pick
or similar tool, remove the seal-
ing ring. (see Figure 18)
Figure 9
Next using a 9/16 hex key
or allen wrench remove
the two high pressure re-
lief valves or check valve
assemblies. (see Figure 9)
Depending upon the pumps model, the pump will incorporate
either two high pressure
relief valves or check valve
assemblies. When high
pressure relief valves are
used, the high pressure
relief valve located on the
low side of the closed cir-
cuit will act as a check
valve. (see Figure 10)
The high pressure relief
valve settings are marked
on the end of each relief
valve assembly as shown
here. (see Figure 11)
Using a 12 mm hex key or
allen wrench remove the
two optional internal pres-
sure override valve plugs,
springs and spring end.
NOTE: Not all models in-
corporate these optional
internal pressure override
valves. (see Figure 12)
Using a pair of needle
nose pliers remove the
valve poppet. (see Figure
13)
Figure 11
Figure 12
Figure 10
Figure 10
Figure 13
Figure 14
Figure 15
Figure 17
Figure 18
Figure 16