10
D10-991-2400 5/1/04
D/G-10 Service (Fluid End)
Model D-10/G-10
With Non-Metallic Pump Head*
NOTE: The numbers in parentheses are the Reference
Numbers on the exploded view illustrations found in this
manual and also in the Parts Manual.
This section explains how to disassemble and inspect all easily-
serviceable parts of the pump. Repair procedures for the
hydraulic end (oil reservoir) of the pump are included in a later
section of the manual.
CAUTION: Do not disassemble the hydraulic end unless
you are a skilled mechanic. For assistance, contact Wanner
Engineering (TEL 612-332-5681 or FAX 612-332-6937) or the
distributor in your area.
CAUTION: The two bolts (29; 25 or 44) that screw through
the back of the housing into the cylinder casting hold the
casting over the hydraulic end of the pump. Do not remove
them except when repairing the hydraulic end.
1. Remove Manifold (6), Valve
Plate (16)
a. Remove all nuts (31) and bolts (4) around the manifold. Do
not remove the two bolts (29; 25 or 44) that are installed
through the back of the pump housing.
b. Use a 3/8-in. (10-mm) hex Allen wrench to remove the
centerbolt (1) and its washer (2).
CAUTION: Do not turn the pump drive shaft while the
manifold and valve plate are off the pump, except when
removing diaphragms or repriming the hydraulic cells.
c. Remove the manifold (6), and support plate (42) [non-
metallic pump head only]. The valve plate (16) will remain
on the cylinder casting (24).
d. Inspect the manifold for warping or wear around the inlet
and outlet ports. If wear is excessive, replace the manifold.
To check if the manifold is warped, remove the O-rings and
place a straightedge across it. A warped manifold should be
replaced.
*NOTE: For non-metallic slurry duty pumps, see the
insert to this manual for fluid valve service (Step 2),
then proceed to Step 3 in this manual for remaining
service steps.
