Martin Sprocket & Gear Bucket Elevator Safety - Manual (Page 10)

6
Installation
NB. Remove belt clamps and adjust take-ups uniformly to both sides to remove any slack in the belt. Use caution to avoid over
tightening the belt as this can cause premature failure of: Belting, shafts, bearings, etc. At this point it is advisable to “run in”
the belt for a period of several hours to observe belt tracking and any further initial stretch.
The responsibility to do the splice correctly lies with the installer.
OB. Install buckets using bolts, nuts and lock washers provided. It is a good idea to peen the bolt threads after the buckets are
securely in place.
If plastic buckets are being installed, use care to avoid over tightening. Large diameter steel flat washers or fender washers are fre-
quently used with plastic buckets.
PB. Adjust bibb to provide up to 3/4” to 1” clearance to buckets. Install upper hood front and back section.
QB. After satisfactory alignment and trial operation, weld stops at each end of head shaft pillow blocks to prevent bearing move-
ment. Stops can be angle iron, channels, keystock material, etc.
NOTES (Belt Type)
AA. If elevator is equipped with gravity take-up, use a come-along or other means to raise take- up box to the upper most position
when splicing the belt.
Add weight (concrete or steel stampings) to weight box as required for smooth operation. Weight must be uniformly distrib-
uted in weight box and sufficient to remove slack from belt.
BB. During normal operations, avoid starting and stopping any elevator when loaded with material.
CC. If elevator components are to be stored at the job site for a period of time prior to erection, insure that components are pro-
tected from the elements.
It is not advisable to cover elevator components tightly with polyethylene. Condensation will collect and cause corrosion to
elevator components and possibly premature motor failure due to moisture in the windings.
DD. If elevator is to be erected but not used for a long period of time, it is least one hour per week.
DRIVES (All Types)
If drive is not factory assembled, install at this time.
1. Gearmotor Drive
Mount driven sprocket securely to head shaft.
Fill reducer with proper lubricant and install driver sprocket. Recommended oil is generally indicated on the reducer name
tags.
Set reducer in position and line up drive sprockets.
Shorten center distance by adjusting movable base.
Install chain and connecting links.
Adjust slide base to a point where some sag is noted on the bottom strand of chain when the top strand is tight.
Lock base of reducer into position. Check all mounting bolts for tightness.
Install chain guard and add lubricant if oil bath guard is furnished.
If possible, rotate gearmotor by hand to determine whether the back stop is correctly installed. (See reducer
manufacturers instructions for additional details.)
Other types of backstops are frequently used. (See manufacturers instructions.)
2. Shaft Mounted Gear Reducers
Assemble back stop to reducer. (See manufacturers instructions.) Assemble reducer to head shaft using bushings and keys if
provided.