QUANTECH
88
SECTION 5 - TECHNICAL DATA
FORM QTC4-NM1
ISSUE DATE: 4/2/2018
TWO INCH DEFLECTION ISOLATOR INSTALLATION AND ADJUSTMENT
WASHER
("F")
("B")
GROMMET
("G")
("A")
("C")
("F")
("E")
("E")
("E")
1/4 - 3/8 GAP
C
L
C
L
("C")
EQUIPMENT
("A")
Read the following instructions before beginning
installation.
1. Isolators are shipped fully assembled and are to be
positioned in accordance with the submittal draw-
ings or as otherwise recommended.
2. Set isolators on oor, housekeeping pad, or sub-
base, ensuring that all isolator centerlines match
the equipment mounting holes. The VMC group
recommends that the isolator base plates (“B”)
be installed on a level surface. Shim or grout as
required, levelling all isolator base plates to the
same elevation (0.25-inch maximum difference
can be tolerated).
3. Bolt or anchor all isolators to supporting structure
utilizing base plate through holes (“C”) or weld
base plate to supporting structure with 0.375"
llet weld 2” long @ 4” on center around entire
base plate or as engineered for specic load and
or eld conditions.
4. Isolators are shipped to the job site with (2)
removable spacer shims (“E”) between the top
plate and the housing. These shims must be in
place when the equipment is positioned over the
isolators.
5. With all shims (“E”) in place, position equipment
on top of plate (“A”) of isolator.
Bolt equipment securely to top plate of isolator
using a minimum of 2 x 0.625" UNC A325
GRADE 5 SAE bolts or weld equipment or
bracket to the top plate (“A”) of isolator with a
minimum 0.375" fillet welds 2” long @ 3” O.C.
for a minimum total weld of 10”. (All sides of
equipment or bracket resting on top plate (“A”)
must be welded).
6. The adjustment process can only begin after the
equipment or machine is at its full operating
weight.
7. Back off each of the 4 limit stop lock nuts (“F”) on
the isolators 0.5”.
8. Adjust each isolator in sequence by turning spring
adjusting nuts (“G”) one full clockwise turn at a
time. Repeat this procedure on all isolators, one
at a time. Check the limit stop lock nuts (“F”)
periodically to ensure that clearance between the
washer and rubber grommet is maintained. Stop
adjustment of isolator only when the top plate
(“A”) has risen just above the shim (“E”).
9. Remove all spacer shims (“E”).
10. Fine adjust isolators to level equipment.
11. Adjust all limit stop lock nuts (“F”) per isolator,
maintaining 0.25-to 0.375-inch gap. The limit
stop nuts must be kept at this gap to ensure uni-
form bolt loading during uplift (as the case when
equipment is drained).
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