ASSEMBLY & DISASSEMBLY
3
MAINTENANCE
REPAIR
1. Determine direction for fluid to flow.
2. Install meter observing directional arrow on casting.
3. Remove four screws (item 28).
4. Rotate meter cover assembly (item 37) to desired
orientation.
5. Replace four screws.
Meter consists of a chamber housing, measuring chamber,
gear train, counter assembly and cover. Meter can be com-
pletely disassembled without disturbing piping, or meter can
be partially disassembled as required.
Counter Assembly
For access to counter assembly, remove reset knob (item 15)
by grasping edges and pulling firmly. Knob is held in place by
a spring clip. Loosen two screws (item 14) and lift bezel off.
Remove two screws (item 12) to detach counter face (item 13).
Remove two screws (item 9) to extract counter (item 10).
Reassemble by reversing procedure.
Meter Chamber Assembly
To expose meter chamber assembly, gear train and seal,
remove four screws (item 28). Meter chamber assembly
consists of upper and lower chambers, a nutating disc and four
screws. Meter chamber assembly (item 3) can be dislodged
by removing four screws (item 5). Reassemble by reversing
procedure.
If replacement of any components of the meter chamber
assembly is required, the complete assembly must be
replaced due to the precise method of its construction. This
assures a proper fit and a correctly operating chamber.
Gear Train and Seal
To disassemble gear train and seal, remove two screws (item
5) and gear frame (item 6). Remove cluster gear (item 18) and
washer (item 19). Remove drive gear (item 24) and washers
(item 23) by rotating and pulling drive gear. Remove O-ring
seal (item 25).
When reassembling seal, lubricate O-ring with oil or petroleum
jelly and replace in cover. Place washer on drive gear shaft.
Rotate and push shaft through O-ring and cover carefully to
prevent damage to O-ring. Shaft must then be guided into
pinion bevel (item 27) if counter has not been removed.
Replace remaining parts to complete assembly by reversing
disassembly procedure.
The Sotera Systems Series 900 meters can be calibrated for
either U.S. gallons or liters. Calibration is required upon
installation, after disassembly, after significant wear or when
metering a different viscosity fluid. Depending on the model,
Series 900 meters are calibrated at the factory metering
Stoddard solvent in either U.S. gallons or liters.
Meter calibration can be easily changed by following the
calibration procedure listed below. A proving container or a
container of KNOWN volume will be needed for the calibration
procedure. It is recommended that the container's volume be
at least five times larger than the unit of calibration. For example,
a five gallon container should be used when calibrating for
gallons.
Procedure for Calibration:
1. Fill container to a known volume.
2. If indicated amount does not match known volume, turn
calibration screw (item 31) counterclockwise to reduce
indicated amount or clockwise to increase the amount.
3. Repeat step 2 until calibration is acceptable.
For accurate measurement and to prevent meter damage,
meter and piping must always be filled with liquid and free of air.
Meter should be calibrated per instructions in this manual prior
to its use.
1. Reset meter to 0.
2. Meter is ready for use.
Meter should operate maintenance free. However, certain
liquids can dry out while in meter housing, causing meter to stop.
If this happens, meter should be thoroughly cleaned (see
instructions below).
Cleaning Instructions:
Run a flushing fluid through meter. For a more thorough
cleaning, disassemble meter per ASSEMBLY/
DISASSEMBLY section, Meter Chamber Assembly
subsection. Rinse all meter components. Recalibrate meter
following calibration instructions above.
Storage:
If meter is to be stored for a period of time, clean thoroughly. This
will help protect meter from damage.
Meters needing repair should be taken to an authorized repair
shop or returned to factory for service. Meters must be
thoroughly triple-rinsed before being taken in for repair.
CALIBRATION
OPERATING INSTRUCTIONS
