Emerson VSS, VSR, VSM service manual Service

Service

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 sup- port float (on new compressor parts only).

TABLE 2. GATE ROTOR FLOAT

MODEL	FLOAT
VSM 301 THRU 401	0.045”
VSM 501 THRU 701	0.045”
VSS 291 THRU VSS 601	0.045”
VSS 751 & VSS 901	0.055”
VSS 1051 THRU VSS 1301	0.060”
VSS 1551 & VSS 2101	0.060”

E)NOTE: Readings could be higher than 0.020. If readings are 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 rein- stalled and the unit can then be evacuated and leak checked before starting.

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