Fristam Pumps FP Series, Инструкция по эксплуатации и техническому обслуживанию, Страница: 6 / 32

Fristam FP/FPX Series Pump
6
Figure 7
Figure 8
S
EAL
R
EPLACEMENT
Begin all pump maintenance by disconnecting the energy source to the pump. Observe
all lock out/tag out procedures as outlines by ANSI Z244.1-1982 and OSHA 1910.147 to
prevent accidental start-up and injury.
T
OOLS FOR
S
EAL
R
EPLACEMENT
15/16” socket
Two 3/4” wrenches
7/16” wrench
3/32” Allen wrench
3/8” diameter steel rod
Pliers (channel locks)
Screwdriver (flat blade)
Soft-faced hammer (5-lb. dead-blow)
Food grade lubricant
Optional tool: One pair of impeller pullers (can be purchased through Fristam)
P
UMP
h
EAD
D
ISASSEMbLY
Note:
the reference numbers listed in the text (#) refer to the assembly drawing on pages 18-21.
Disconnect the suction and discharge piping from the pump. Drain all fluid from
the pump prior to disassembly.
a) Loosen the cover nuts (26) with the soft-faced hammer and remove.
b) Remove the pump cover (24) and the cover gasket (21).
c) Remove the seal water pipes (on pumps with a double me-
chanical seal or water casade option) by turning them
counter-clockwise with the pliers.
d) Loosen and remove the guard screw (3). Next remove
the shaft guard (35).
e) Place the 3/8” diameter rod in the pump shaft hole.
Allow the rod to rest against the pump flange support
(2) to prevent the shaft from rotating while loosening
the impeller nut (23) with the 15/16” socket wrench
(
Figure 7 ). Remove the impeller nut and the impeller
nut gasket (25).
f) Remove the impeller (22) from the pump shaft (7) by
grasping an impeller blade in each hand and pulling the
impeller toward you. If the impeller is difficult to pull off the
shaft, wedge the impeller pullers between the pump housing (10) and the back of the impeller and
pry off the impeller (
Figure 8 ).
g) Compress the seal spring (34) by pushing on the front seal driver (36) and lift
out the impeller key (8) ( Figure 9 ). (You may find it easier to rotate the
keyway to bottom of the shaft, compress the seal spring, and let the key
drop out.)
h) Next remove the front seal driver and seal spring by pulling them off
the pump shaft and discard them.
i) Remove the rotating seal, seal washer and o-ring by gently placing the
flat ends of two impeller pullers on either side of the rotating seal and
carefully pull (wiggling the seal ring side-to-side should aid removal)
!
! WARNING