Martin Sprocket & Gear Bucket Elevator Safety - Manual (Page 7)

Installation
3
CASING (All Elevators)
A. Insure that anchor bolts are securely placed and conform to the pattern of the boot section mounting holes.
B. Set boot in place insuring that boot section top flange is level and casing is plumb.
This is accomplished by shimming under the bottom flange. Use shims only next to anchor bolts—not elsewhere along flange.
Any gap resulting from shimming is generally sealed with a strong structural grout.
C. It is essential that the boot be set accurately.
D. Check drawings to determine correct sequence of erecting intermediate casing. Caulk or gasketing (if provided) should be placed
between all casing flanges to provide dust tight sealing.
E. Normally the erection crew should build a lifting bracket to avoid distortion to fabricated assemblies.
F. Each and every intermediate section must be level and plumb. It is common to find minor deviations in these types of fabricat-
ed assemblies.
Most often they can be corrected by rotating 180° or turning end for end.
If this does not solve an out of level or out of plumb condition it will be necessary to use metal shims and caulk the resulting
gap.
When a gap occurs in a corner of the casing, metal shims should be used and should extend a minimum of six inches in both
directions. Insure that shims do not project inside of casing.
Each intermediate section must be plumbed to less than 1/8” deviation before proceeding to the next section. Casings must be
braced or anchored to a rigid structure every 20 ft. and not more than 4 ft. below the head section. If a rigid structure is not
available, guy wires may be used with the same spacing.
G. After all intermediate sections are correctly placed, remove the front and back sections of the hood and set the lower head using
the same procedures as with the intermediate sections. Replace hood sections after performing all installation steps H thru PC
or PB.
H. It is critical that the head shaft be exactly level. Minor pillow block shimming may be necessary. Check head shaft pillow block
set screws for tightness.
MACHINERY (Chain Type)
IC. Remove boot sprocket access door.
Drop plumb line from head end sprocket to boot sprocket. Insure that sprockets are centered in casing and are exactly in line
with each other.
When erecting a double strand chain elevator, check factory drawings for correct sprocket spacing.
Check to insure that the sprocket set screws are tight. Sprockets should be in line when viewed from the narrow side of the casing.
Head and boot shafts are generally offset when viewed from the wide dimension of the casing. Check factory drawings for offset.
Double strand chain elevators commonly will have no offset as identical sprockets are used at the head and boot sections.
JC. Move boot take-up to its uppermost position (head end take-up to lowest position.) Make these adjustments uniformly to both
sides at the same time. Many bearings will not accommodate much misalignment. Severe damage to internal bearing parts and
seals can occur if this procedure is not followed.
KC. Depending on lifting equipment and access available, the chains and buckets can be preassembled or installed in 10 ft. sections
of chain with buckets to be attached later.
When installing offset side bar chain, insure that the widest part of the side bar (open end) points in the direction of chain travel.
Use care not to get a side twist in the chain during handling.
LC. It may be necessary to remove up to several links of chain during initial installation.