OM-01510
D SERIES
MAINTENANCE & REPAIR
PAGE E - 11
the valve seat (6) and check valve assembly to the
diaphragm pot. Pull the check valve assembly from
the suction port.
To service the discharge check valve assembly (7),
loosen the hardware (12 and 13) and remove the
assembled outboard discharge elbow (5), check
valve, and seat (6). Remove the gasket (14).
Remove the hardware (9 and 10) securing the
valve seat (6) and discharge check valve assembly
to the discharge elbow.
To remove the inboard discharge flange (3), loosen
the hardware (12 and 13) securing the flange to the
diaphragm pot. Remove the gasket (14).
If no further disassembly is required, see
Suction
And Discharge Check Valve Installation
.
Diaphragm Removal
(Figure 1)
To remove the diaphragm (6, Figure 3), disengage
the hardware (31, 32 and 33) and remove the dia
phragm pot assembly (34). Inspect the diaphragm
ring (23) for wear or damage. If replacement is re
quired, the gearbox assembly (28) must be re
moved.
(Figure 3)
Remove the nuts (10). Separate the lower dia
phragm plate assembly (8) from the diaphragm (6)
and the upper diaphragm plate (9). Inspect the dia
phragm and replace a required.
If no further disassembly is required, see
Dia
phragm Installation
.
Plunger Rod Removal And Disassembly
(Figure 3)
With the diaphragm pot assembly and diaphragm
removed, disengage the hardware (38, 39, 40, 43,
44, and 45, Figure 1) and remove the eccentric
guard (41, Figure 1).
Loosen the hardware (2, 3 and 4) and remove the
end cap (27, Figure 1). Slide the bearing cap (1) off
the crankshaft roller bearing (33, Figure 4), and re
move the plunger rod assembly.
Use a socket wrench to hold the plunger rod (5) se
curely, and unscrew the bearing cap assembly (1).
Unscrew the spring retaining nut (13).
Use caution
when unscrewing the retaining nut; tension on the
spring (12) will be released.
Remove the spring (12) and spring washer (11).
Slide the plunger rod assembly (5) out of the upper
diaphragm plate (9).
Inspect the component parts for excessive wear
and replace as required.
Gearbox Removal And Disassembly
(Figure 1)
When properly operated and maintained, the gear
box assembly (28) should not require disassembly.
Disassemble the gearbox
only
when there is evi
dence of wear or damage.
Shaft and bearing disassembly in the field
is not recommended. These operations
should be performed only in a properly
equipped shop by qualified personnel.
Support the diaphragm ring (23) with wooden
blocks. Disengage the hardware (29 and 30) and
remove the diaphragm ring. Inspect the dia
phragm ring for wear or damage and replace as
necessary. It is not necessary to remove the draw
bar (24) from the diaphragm ring unless replace
ment is required. Disengage the hardware (36 and
37) from the U‐bolts (35) to remove the drawbar.
Disengage the hardware (19, 20, 21 and 22) and
remove the coupling guard (4). Loosen the hard
ware securing the drive shaft coupling (1). Sepa
rate the gearbox assembly from the coupling by
pulling straight away. Remove the shaft key (17,
Figure 4).
(Figure 4)
Before attempting to disassemble the gearbox as
sembly, drain the lubricant by removing the drain
plug (22) and turning the gearbox on its side. Clean
and reinstall the drain plug.
Remove the hardware (15 and 16) securing the ec
centric housing (20) and housing gasket (21) to the
