Bucket Elevators Centrifugal Discharge Positive Discharge Continuous Discharge Internal Discharge

SAFETY Safety is a basic factor that must be considered at all times in the operation and maintenance of mechanical equipment. Use of proper tools and methods can prevent serious accidents that may result in injury to you and your fellow workers. A number of safety precautions are listed throughout this manual. Study them carefully and follow them; insist that those working with you do the same. Remember - an accident is usually caused by someone's carelessness or negligence. The precautions listed may not necessarily be aIl-inclusive and others might occur to the user which are peculiar to a...

TYPES AND DESCRIPTIONS Positive Discharge Centrifugal Discharge Centrifugal Discharge Elevators of this group handle bulk material that is fine, loose and free-flowing with small to medium size lumps. Material is discharged from these elevators by centrifugal action as the buckets pass over the head sprockets. The first four types below are generally furnished with AA or HS buckets. Type Type Type Type Type Type Type fixed head shaft - internal gravity takeups on foot shaft. similar to Type 1 except - adjustable head shaft - fixed foot shaft. fixed head shaft - screw takeups on foot shaft. similar...

Internal Discharge Continuous Elevators of this group handle bulk material ranging from light to heavy and from fines to large lumps. Buckets are spaced continuously and are loaded by direct feeding. Type 7 - fixed head shaft - internal gravity takeups on foot shaft. Type 8 - similar to Type 7 except - adjustable head shaft – fixed foot shaft. Type 10 - fixed head shaft - screw takeups on foot shaft - super capacity buckets mounted between two strands of chain. Type 11 - similar to Type 10 except - head terminal machinery and drive equipment are carried on independent supports. Internal Discharge...

INSTALLATION Casing The procedures outlined represent an accepted method for erecting bucket elevators. It is recognized that other procedures may be equally effective and that variations may prove advisable depending on conditions and surroundings. It is recommended that personnel familiar with elevator erection be used for installation of this equipment. An adequate foundation for the elevator weight and soil conditions and suitable anchor bolts must be provided. 1. Place boot section on foundation, and make certain feed side is correctly located. 2. Level top flange with steel shims under...

13. Mount hood after head shaft, chain and buckets are installed, all adjustments made, and elevator tested and ready for operation. Bolt the section of hood over discharge spout in place and complete all head shaft dust seal adjustments before assembling rear half of hood. 14. Apply field paint after erection is completed.

HEAD SECTION 1. If not factory pre-assembled, assemble head machinery in casing as indicated on order drawing. Locate sprocket or pulley on head shaft and lock in place with set screws. 2. Mount head shaft on head section and make sure shaft is level and at right angles to the wide side of casing. 3. Align pillow blocks with shims if necessary so shaft turns freely. Follow separate instructions for mounting and lubricating bearings. 4. Lock adjustable bearing stops on fixed head shaft pillow blocks. 5. If a necked shear pin type drive sprocket is furnished, make sure journalled section of shear...

Drive (Motogear or Gearmotor) 1. Install speed reducer on drive bracket or platform as shown on drawing. If drive is furnished with separate motor with feet, use care when aligning motor with drive. Shim or adjust motor so flexible coupling halves are in line and their faces equally spaced at four points on their circumference. If speed reducer is shipped with motor mounted on base, field check alignment of coupling to be sure it has not shifted during shipment. Follow instructions provided for installing flexible coupling. 2. Mount drive chain sprocket on speed reducer output shaft, align with...

Drive (shaft-mounted speed reducer) 1. Install motor mounting bracket on back side of reducer, so that when viewing input shaft it is level with and to the left of the output shaft and motor mounting bracket extends downward. Larger overhang of the bracket must be toward input shaft face of reducer, see Fig. 601-3. 2. For installation of backstop see separate instructions provided. 3. Locate breather, oil level and drain plugs as shown in Fig. 601-4 when viewing input shaft. 4. Install reducer on head shaft using the reducing bushing if required to adapt to head shaft size. 5. Install torque...

Boot Section EXTERNAL SCREW TYPE TAKEUP INTERNAL GRAVITY TAKEUP Assemble foot machinery in boot as indicated. 1. Locate foot shaft and foot sprocket or pulley in boot as indicated by the drawing and lock sprocket securely in place using setscrews provided. 2. If foot shaft is screw adjustable, move shaft to top of takeup travel, level shaft, and match-mark casing and sliding portion of takeup for reference points when making later adjustments. When foot shaft is fixed, locate at right angles to wide side of elevator casing, level shaft, and align bearing blocks, using shims so shaft rotates without...

G ATTACHMENT WING ATTACHMENT K ATTACHMENT WITH OVER- LAPPING CONTINUOUS BUCKET Handling chain For convenience in shipping and handling, chains are coiled in segments approximately 10 feet long. For elevators using a single strand of chain, couple the chain segments together and bolt the buckets to the attachments with the chain stretched out. This simplifies handling and installation and also helps to keep the chain straight. Crooked or twisted chain can cause operating difficulties. SS4851 and SS4852 Chains, 9" Pitch, With SS4850 Chain, 12" Pitch, Buckets Every 2nd Pitch With Bucket Every Pitch...

Chain can become twisted if improperly handled. Never, pick chain up by hooking into the center of a coil. Support the entire coil as shown in Fig. 7976. STAND CLEAR WHEN HOISTING LOADS. Do not feed the chain into elevator on its side. Prevent the possibility of twist by feeding it in the manner shown in Fig. 7975.