AAF International Type N RotoClone - Manual (Page 11)

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by moving the upper bearings from the lower bolt hole to the
upper bolt hole (Figure 4). If the slack remains, remove one
link and move the bearing back to the lower bolt hole. Each
time the RotoClone is drained, check for condition
of shaft bushings and sprockets on the ejector (Figure 9).
2) Type “L2” ejector (Size 16 thru 48) chains should be checked
periodically or when the unit is drained for cleaning. The
ejector return run of chain is suspended to maintain tension
and reduce frequency of take-up. If necessary, remove links
from each chain before upper run sags enough to interfere
with lower run operation or entering edge of guide assembly.
(Figure 10).
b. Submerged Shafts:
Check Type “W2” and “L2” shafts, sprockets, and bushings when
unit is drained (Figures 9 and 10).
c. Upper Shafts:
Grease bearings on the upper ejector and paddle scraper shaft
each week with Mobilith AW2 or equal.
d. A shear pin protects the chain and paddle assembly. See Figure
10, Item 28, for location and size (L2 ejectors only).
CAUTION: When shear pin breakage occurs, immediately investigate
the cause of trouble. Do not exchange proper shear pin with solid pin.
e. The oil in the speed reducer should be drained at the end of the
first ten days for 24 hours per day operations or at the end of 30
days when operation is 8 hours per day. The case should then
be thoroughly flushed with light flushing oil. Fill to oil level with
new oil of the proper grade. After this, change oil every 2500
hours or every six months whichever comes first.
1) To prevent loss of oil while units are in transport, the
reducers are shipped with a brass pin in vent or filler
plug. This pin must be removed before the reducer
is operated.
2) A drain plug at or near the bottom (base flange) of the reducer
housing is provided for oil removal.
3) Use Cities Service Oil Trojan Compound L-4, Gulf Oil’s E.P.
Lubricant #145, Shell’s Valvata Oil #J78, Mobile Oil Co.’s
Mobil Cycl. Oil #600 W or equal.
f. Once each month inspect the paddle scraper for correct
positioning against ejector paddle; the scraper bumpers, ejector
chain and sprockets for wear.
5. Exhauster:
a. Check exhauster for excessive vibration each month while
checking V-belt drive. Be certain exhauster is rotating in
proper direction.
b. Check exhauster wheel and housing every 3 months and remove
any accumulation.
c. See Fan IOM for lubrication schedule. Remove old grease from
bearings at least every 6 months, replacing with medium (No. 2)
grade S.R.I. grease. Excessive grease may cause bearings to
overheat. If too much grease has been added, remove grease
fitting and run exhauster, until excessive grease is driven from
the bearing. Replace fitting.
6. V-Belt Drive
a. Check belt tension each week for the first month of operation;
monthly thereafter. Refer to Exhauster IOM for correct tension.
Loose belts reduce air flow through the RotoClone and cause
excessive belt wear.
7. Replacement Part Stock:
a. Sludge ejector chains and sprockets are subject to considerable
abrasion in many applications. Life will vary from 6 months to
more than 3 years. Stocking of ejector parts as indicated on
ejector parts list will prevent expensive shutdown. Parts list
shown in Figure 9 is for “W2” ejectors on Sizes 1
1 ⁄
2
thru 12.
Figure 10 is parts list for “L2” ejectors on Sizes 16 thru 48.
b. Replacement of impeller and eliminator sections will be required
at prolonged intervals. Routine inspection will give ample
warning for replacement requirements.
When ordering replacement parts, give:
Part Name, Number, RotoClone Size, Type, and Serial Number.
B. Correction of Poor RotoClone Operation
Most difficulties that may be encountered in RotoClone operation will
be discovered and corrected by one or more of the following:
1. Reduction in air flow at exhaust hoods:
a. Reduced exhauster speed due to belt slippage.
b. Accumulations in ducts or hoods due to sticky nature of dust or
settling in ducts caused by low conveying velocities.
c. Addition of more exhaust points to the system.
d. During winter when doors and windows are closed insufficient
makeup air to the exhaust system will create high negative
pressure in room.
e. High water level in RotoClone can be observed through closed
portlight in control box. Water level above running level weir can
be caused by:
1) Plugged drain line from control box.
2) Open or leaky fill valve that allows water to feed into
RotoClone at a high rate raising level over running level weir
1 ⁄
4
" or more.
3) Air leak in control box due to portlight cover not closed tight or
failure to pour water in drain pipe to provide water seal (See
Item A-3, Operating Instructions).
4) Malfunctioning solenoid valve on Model “A” control box.