The springs in the second-generation spring-mounted baseplate are supplied in two sizes:
Free length of spring
Spring rate
Location
Length of stud used with
the spring
7.125 in. (181 mm)
885 lbs/in.(149.72
newtons/mm)
Mounted under the base-
plate below the pump
16 in. (406 mm)
11 in. (280 mm)
176 lbs/in.(30.82
newtons/mm)
Mounted under the base-
plate below the motor
22 in. (559 mm)
1.
Put the baseplate on a support above the foundation/floor.
Make sure that there is approximately 16 in. (406 mm) between the baseplate and the foundation/
floor in order to provide enough space to install the spring assemblies.
2.
Apply an anti-galling compound to the threads of the studs, nuts, and bearing pads.
3.
Assemble the spring assemblies:
a) Set a hex nut and a hex jam nut on a spring stud and thread it down 1 in. (25 mm).
b) Insert the stud from the top of the mounting bracket on the baseplate.
Refer to the GA outline dimension drawing in order to determine the correct length of the studs for
each location.
c)
Install a follower with the flat side facing up.
d) Install a spring.
Refer to the GA outline dimension drawing in order to determine the correct spring for each location.
e) Install a follower with the flat side facing down.
f)
Install a flat washer, a hex nut, and a hex jam nut and thread them up 2 in. (54 mm).
g) Install a bearing pad on the lower end of the stud.
h) Hand-tighten the stud to the bearing pad.
The depth of the thread in the bearing pad is 1 in. (25 mm).
i)
Set the bottom adjusting nuts on the stud to the heights (X1 and X2) indicated on the certified
GA dimension drawing.
Adjust distances by moving the hex nut and the hex jam nut up or down.
4.
Repeat step 3 for each stud and spring assembly.
5.
Lower the baseplate so that the spring assemblies fit into the foundation pads.
The weight of the baseplate compresses the springs, which leaves the upper nuts loose. You might
have to level the baseplate by adjusting the X1 and X2 dimensions.
4.2 Baseplate-mounting procedures
Models 3180, 3181, 3185, and 3186 Installation, Operation, and Maintenance Manual
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