30119-02 Rev. 2.6/07-09
6
the reverse thrust cartridge on, stop at once and check to be
sure the set screw is not binding on the thread. Be careful
not to cross-thread the reverse thrust bearing cartridge.
Thread the reverse thrust bearing cartridge (#46) onto the
spindle (#35) until the trailing edge of the propeller contacts
the drop pipe (#17). Set the proper end play by inserting a
5/64” allen wrench into the reverse thrust bearing set screw
(through the side of the propeller) and loosen the reverse
thrust bearing cartridge (#46) 1/2 turn counterclockwise.
Tighten the set screw in reverse thrust bearing cartridge.
There should be approximately .020” clearance between the
drop pipe (#17) and trailing edge of the propeller when the
propeller in pulled forward (away from the drop pipe). The
propeller must not contact the drop pipe.
8. THRUST BEARING CARTRIDGE ASSEMBLY (#50)
should
be inspected for damage and replaced in the nose of the
propeller. The thrust bearing cartridge (#50) is used to
adjust the amount of longitudinal end play of the propel-
ler assembly on its spindle (#35), which should be about
1/64 inch. End play can be adjusted by turning the thrust
bearing cartridge assembly (#50) clockwise until it tightens
against the end of the support spindle (#35), then turning
thrust bearing cartridge (#50) counterclockwise 1/8 of a
turn. Tighten set screw (#49). Check the longitudinal end
play of the propeller to insure it’s not excessive and does
not allow the propeller (#40) to contact the drop pipe (#17).
Check the clearance between the propeller (#40) and drop
pipe (#17). The clearance should be approximately .010”
between the drop pipe (#17) and trailing edge of the pro-
peller when the propeller in pushed back (toward the drop
pipe). The propeller assembly (#39) must spin freely.
9. PROPELLER BEARING (#41)
can be checked for excessive
radial play by rocking the propeller (#39) gently from side to
side on the spindle (#35). Some play is required for proper
operation of the water lubricated ceramic sleeve bearing.
XI. INSPECTION
of all internal meter parts that may be replaced
in the field has been accomplished at this point. Should any
of the meter parts upon inspection, appear to be damaged
or excessively worn, they must be replaced to assure proper
meter operation and prevent further damage.
XII. REASSEMBLY
is necessary at this point. Before reassem-
bling any parts, make certain that each is cleaned of any
dust or dirt and properly lubricated. Cost for replacement
parts not covered by warranty are available from current
parts and price list. If it is determined that the meter
should be returned for repair, please notify McCrometer
prior to shipment. Each meter must be properly packaged
to prevent damage to the meter in shipment.
1. MITER GEAR FRAME ASSEMBLY (#21)
can be replaced
in the back of the gearbox (#17) with a firm push, gently
rotating the assembly at the same time. Replace the miter
gear frame o-ring (#30) and cover the new o-ring with a
thin coat of silicone grease before replacing the assembly
(#21). Make certain that the assembly is installed in a
position such that the drive clevis portion of the driven miter
gear shaft (#29) can accept the driven clevis portion of the
vertical shaft assembly (#14). Secure with four mounting
screws (#33).
2.
GEARBOX (#17)
must be filled with three ounces of 10w
mineral oil. A small funnel or an oil can with a small nozzle
will make filling the gearbox (#17) easier. Pour the oil
through the opening in the top of the meter head (#13).
3. VERTICAL SHAFT ASSEMBLY (#14)
should be inserted
gently into the gearbox (#17) through the opening in the
top of the meter head (#13). Rotate the shaft gently until
it is engaged in the driven miter gear shaft (#29) of the
miter gear frame assembly (#21). Replace and secure two
screws (#16) that hold the upper bearing (#15) in place.
Do not overtighten the screws (#16) as this could cock
the bearing (#15) and bind the vertical shaft (#14). Turn
the top of the vertical shaft (#14) to check for any bind or
drag. Should any bind or drag be apparent, it can usually be
corrected by adjusting the vertical shaft collar and bearing
assembly (#15). Loosen the set screw (#16) in the side
of the assembly (#15) and slide the shaft (#14) downward
until it rests against the driven miter gear shaft (#29), then
lift up about 1/64 inch. Tighten set screw (#16).
4. TOTALIZER DRIVE MAGNET ASSEMBLY (#12)
should be
checked again to make certain it is properly set to drive the
totalizer (#4). (See step VI, 4.)
5. TOTALIZER BASE CUP (#5)
can be placed back in the
totalizer bonnet (#1) on the totalizer assembly (#4) after
the desiccant capsule and base cup o-ring (#6) are replaced.
Be sure o-ring (#6) is on base cup (#5) properly.
6. BONNET ASSEMBLY (#1)
should be cleaned and replaced
on the meter head (#13). Bonnet o-ring (#2) should be
replaced and the new o-ring (#2) covered with a thin coat
of silicone grease. Secure four screws (#3).
7. PROPELLER ASSEMBLY (#39)
should be dipped in water
to lubricate the propeller ceramic sleeve bearing (#41) and
spin the propeller (#40) gently to make certain the meter
operates smoothly and no bind or drag is apparent.
8. METER HEAD GASKET (#52)
should be inspected for any
sign of damage and replaced if necessary. The meter can
now be installed in the service line. When replacing the
meter on the line, make certain that the top of the welding
saddle is smooth and free of any foreign material. Make
certain that no foreign materials are attached to the inside
of the service line pipe, as any flow disturbance or obstruc-
tion may affect the accuracy of the meter.
