Sundyne LMV-313, Инструкция по эксплуатации

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Instruction and Operation Manual
33
Procedure for Checking the High-Speed Shaft Endplay and
Shoulder Height
The endplay of the shaft
MUST
be measured if
any of the following parts have been replaced:
•
High speed shaft assembly
•
Thrust washer
•
Output housing
•
Journal bearing
•
Bearing plate
Sundyne recommends checking endplay during
any re-assembly.
To obtain correct shaft endplay shim spacers
must be installed as required.
Note: All parts must be dry and free of oil.
The output shaft assembly (A130) is dynamically
balanced. Under most circumstances it does not
require disassembly. Inspect the journal
bearings and thrust runners for discoloration
from overheating, also check for contact on the
gear teeth.
Shims (158) are used beneath both high speed
bearing assemblies (151A and B). The shims
function is to provide both axial float (end play)
and insure proper shaft extension. Both must be
checked with the output shaft thrust towards the
impeller. Dry bearings are required to make the
adjustments. Any presence of oil under the
thrust surfaces will produce inaccurate readings.
Step 1
Install the bearings (151A & B) without the shims
in the output housing and bearing plate.
Step 2
Place the output housing on a raised surface
with the open side up. Leave room for the input
shaft to project through.
Step 3
Install the output shaft (A130) into the output
housing bearing.
Step 4
Install the bearing plate. Be careful not to
damage the thrust washer (155B). Leave out the
idler shaft assembly (A140), gearbox gasket
(105), and the o-ring (936T) from the gearbox
split line. Install both of the alignment bolts
(909C). Do not install the gearbox input housing.
Clamp the bearing plate to the lower housing
using “C” clamps or short bolts. This will insure a
metal-to-metal fit.
Step 5
Turn the assembly over so the output shaft is
extended upward. Load the output shaft toward
the impeller (against bearing 151A). Measure
the shaft extension dimension. A standard depth
micrometer can be used if the gearbox seal
rotating face (51D) is installed on the shaft.
Determine the amount of shim to be used under
bearing (151A). Shaft shoulder height should be
1.203” ± .005”.
Step 6
Install a dial indicator to measure the shaft axial
float. This can be done inside or outside the
gearbox. Take the total float reading and
subtract the amount of shim to be used under
the bearing (151A), then subtract 0.015 inch
(desired end-float) from the total. The sum is the
required thickness of the shim to be placed
under the other bearing (151B).
Step 7
Shims supplied by Sundyne Corporation usually
come in thicknesses of 0.005” to 0.010”. Select
the shims that best obtain the shaft extension
and end float dimensions.
Note: The axial float should be 0.015 ± .002
inches. It is preferred to have slightly
more end float than slightly less end
float.
Step 8
Install the shims. Check both dimensions.
Repeat the procedure if necessary.
Step 9
After proper shimming has been completed the
gearbox can be reassembled. Do this by
reversing the disassembly procedures.