Gorman-Rupp Pumps 4D-X3 1P - Manual (Page 27)

OM--01515 D SERIES
MAINTENANCE & REPAIR PAGE E -- 11
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 (37, 38, 39, 42,
43, and 44, Figure 1) and remove the eccentric
guard (40, 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 (5).
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)
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
gear cover (7). Pull the complete drive shaft sub-
assembly from the gear cover.
To disassemble the drive shaft subassembly, re-
move the snap ring (26) and slide the drive gear
(25) off the drive shaft (18). Remove the retaining
ring (24), and press the drive shaft and assembled
bearings (23) out of the eccentric housing. Press
the oil seal (19) from the housing bore. Cover the
shaft and bearing with a clean cloth until ready to
clean and inspect the gearbox components.
For access to the remaining gearbox drive compo-
nents, the gear cover (7) and gear housing gasket
(4) must be separated from the gear housing (1) by
removing the two close-tolerance shoulder bolts
(40 and 47), which act as pilots to ensure accurate
concentric positioning of the cover, and the re-