Emerson VSG Manual page 32

4) Add both readings, the total indicator move-
ment is the bearing float and this should not
exceed 0.003".
C) Gate rotor bearing float.
1) Remove the side covers and position a dial
indicator on the gate rotor.
2) Use a lever arm pivoting on a bolt with a
small block of wood against the gate rotor
blade to protect the blade.
3) The maximum amount of bearing float
should not exceed 0.002".
D) Measure the gate rotor to blade float. Some
movement between blade and support is neces-
sary to prevent damage to the compressor blade,
however at no time should the blade uncover the
support.
1) Position the blade with the gate rotor
damper pin and 90º to the main rotor.
2) Position a dial indicator at the tip of the sup-
port. The total movement of the damper pin
in the bushing is the gate rotor float. Refer
to table 0.2 to find the maximum blade to
support float (on new compressor parts
only).
32
Service
TABLE 2. GATE ROTOR FLOAT
MODEL
VSG 301 THRU 401
VSG 501 THRU 701
VSSG 291 THRU VSSG 601
VSG 751 & VSG 901
VSG 1051 & VSG 1201
VSG 1551 THRU VSG 2101
E) Readings could be higher than 0.020. If read-
ings is greater than 0.030 over table tolerance
contact Vilter's home office.
F) Inspect the main and gate rotors for signs of ab-
normal wear due to dirt or other contaminants.
G) After the inspection is complete, the covers,
coupling center member and guard can be
reinstalled and the unit can then be evacuated
and leak checked before starting.
FLOAT
0.045"
0.045"
0.045"
0.055"
0.060"
0.060"