Owner`s manual
7
MAINTENANCE
Replacement is completed by pushing panel up un-
der cabinet top and pressing in at the bottom until
panel mounting brackets are engaged. Doors may be
removed to improve access to cabinet interior for re-
pairs as shown In Figure 16 on page 21.
The two at head screws (10) and nuts (12) holding
cabinet hinge (11) are removed and the door lifted
out. When doors are remounted the nal tightened
position of hinge (11) determines the alignment of the
door and must be set with care.
DRAW-OFF VALVE REPAIR
An exploded view of the draw-off valve is shown in
Figure 11 on page 17. All parts are replaceable.
C
OMMON LEAK REPAIRS
To repair a valve leak, the source must rst be de-
termined. Leaks from around the valve stem are cor-
rected by replacing the rubber “0” ring (5) .Dripping
from the valve outlet which occurs with the valve
tightly closed indicates faulty seating of the valve disc
(part of 6) against the valve seat. Dripping is often
corrected by cleaning residue from disc and seat us-
ing very ne emery.
VALVE SEAT LAPPING
Should either the disc (part of 6), or seat be found
damaged it is necessary to either replace the entire
valve or perform the lapping procedure as follows:
Disassemble the valve and clean both the disc
and the valve seat.
Attach the handle (2) to the stem with the valve
bonnet (4) removed.
Apply a good grade of ne lapping compound to
the disc and insert it into the valve to make light
contact against the seat.
Rotate the stem disc against the seat by turning
the handle, allowing the stem to wobble in the
space the bonnet would normally occupy. Con-
tinue with light pressure until compound dries.
Reassemble and test for leaks with valve closed.
If dripping occurs repeat the lapping procedure
as many times as required to obtain a watertight
seal.
TILTING MEChANISM REPAIR
Tilting kettles are equipped with tilting mechanisms
shown in Figure 5 on page 12 for 25- and 40- gallon
kettles and Figure 7 on page 14 for 60-gallon kettles.
Though both .utilize the same screw assembly (2) ,
only Figure 5 on page 12 includes brake disassem-
bly detail and serves as the reference view for tilting
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2.
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4.
5.
mechanism repairs which follow.
S
AGINAW SCREW ASSEMBLy REMOVAL
The assembly is removed with the kettle in the low-
ered position. Proceed as follows:
Remove the two bolts (8) which hold the ball nut
assembly in the screw lever (7).
Remove the two 5/16” hex head cap screws (13)
which fasten the screw housing (14) to the cabi-
net frame (not shown).
Lift screw assembly from the cabinet. Proceed in
reverse order to replace the assembly.
GENERAL INSPECTION AND CLEANING
The screw assembly should run smoothly throughout
the entire stroke. If operation is not uniform remove
the screw assembly (refer to saginaw screw assem-
bly removal above) and proceed as follows:
Inspect screw shaft for signs of accumulation of
foreign matter in the ball grooves.
Using cleaning uid or solvent remove dirt from
ball grooves. Be sure to ush the ball nut assem-
bly thoroughly.
Cycle the ball nut along the screw shaft several
times. Wipe with a dry lint less cloth and lubricate
immediately. (refer to tilting mechanism lubrica-
tion on page 6).
If assembly continues to operate erratically after
cleaning disassemble and inspect the ball nut as-
sembly.
BALL NUT DISASSEMBLy
The Saginaw Screw is a ball bearing screw power
transmission device which converts the turning mo-
tion applied by the hand crank ( 1) into bi-directional
force against the screw lever (7). The frictionless
“easy” transfer results from the use of bearing balls
circulated be- tween the screw and nut in concave
helical grooves. As the screw rotates inside the nut,
the bearing balls are directed from one end and car-
ried by a ball guide to the opposite end of the ball nut.
Figure 3 on page 8 shows a cut-away view of the ball
nut.
Nut disassembly requires extreme care in handling to
avoid loss of bearing balls and other small parts. The
Saginaw Screw must be removed from the kettle (re-
fer to saginaw screw assembly removal above) and
the procedure completed over a clean work surface.
A small clean container and clean cloth are required.
Place a clean cloth on the work surface with edg-
es gathered to form a pocket to retain the bearing
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2.
3.
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3.
4.
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