D SERIES
OM-01479
MAINTENANCE & REPAIR
PAGE E - 8
If removed, secure the key (14) in the gear reducer
keyway with “Loctite Retaining Compound No.
680” or equivalent and slide the eccentric over the
gear reducer shaft. Secure it by tightening the
socket head capscrew (2, Figure 2).
Secure the diaphragm and retainer ring to the dia
phragm pot by tightening the hardware (16 and 17)
in an alternating sequence.
Install the guard (15) over the plunger rod and se
cure it with the tapscrews (29).
Suction And Discharge Check Valve
Installation
(Figure 1)
Inspect the check valves and replace as required.
Individual parts for the suction and discharge
check valve assemblies are not available. Replace
the complete assemblies if they are excessively
worn or damaged.
Position the discharge check valve (22) against the
diaphragm pot with the weight positioned as
shown in Figure 1. Secure the discharge flange
(21) and diaphragm to the diaphragm pot with the
hardware (19, 20 and 23).
Position the suction check valve (27) against the di
aphragm pot with the weight positioned as shown
in Figure 1. Secure the suction flange (28) and dia
phragm to the diaphragm pot with the hardware
(20).
Check the operation of the check valves to ensure
proper seating and free movement.
Connect the suction and discharge piping as de
scribed in
INSTALLATION
, Section B.
Refer to
OPERATION
, Section C before starting
the pump.
LUBRICATION
Plunger Rod Assembly
(Figure 2)
The rod end should be lubricated thor
oughly after each 8 hours of operation.
Failure to do so may cause the rod end
bearing to overheat and fail.
Before attempting to lubricate the plunger rod as
sembly, rotate the eccentric cam until the upper
grease fitting (5) can be accessed through the
slotted hole in the eccentric guard (15, Figure 1).
Use a grease gun to apply No. 2 lithium base
grease to the upper lubrication fitting until grease
escapes from the eccentric cap. Lubricate the low
er fitting (10) until grease escapes from the top of
the upper diaphragm plate inside the spring.
Gear Reducer
(Figure 1)
The gear reducer used on this unit is lubricated for
life from the manufacturer. No additional lubrica
tion is required. If the gear reducer has been disas
sembled for maintenance, follow the lubrication in
structions provided by the gear reducer manufac
turer for the recommended type and quantity of lu
bricant.
