Ametek DR707 Service And Parts Manual - Page 5

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6) Remove the housing bolts and remove the motor assembly (arbor/.housing on remote drive

models).

7) Arbor disassembly (Applicable on remote drive models only):

a) Slide the bearing retraining sleeve off the shaft at the blower end.

b) Remove the four (4) screws and the bearing retaining plate from the blower end.

c) Lift the shaft assembly far enough out of the arbor to allow removal of the blower end snap

ring.

d) Remove the shaft assembly from the arbor.

e) If necessary, remove the shaft dust seal from the pulley end of the arbor.

Muffler Material Replacement:

1) Remove the manifold cover bolts and them manifold cover.

2) The muffler material can now be removed and replaced if necessary. On blowers with fiberglass

acoustical wrap the tubular retaining screens with the fiberglass matting before sliding the muffler

pads over the screens.

3) Reassemble by reversing the procedure.

NOTE:

On DR068 models with tubular mufflers it is necessary to remove the cover and

impeller accessing the muffler material from the housing cavity.

Blower Reassembly:

1) Place the assembled motor (assembled arbor assembly for remote drive models) against the rear

of the housing and fasten with the bolts and washer.

2) To ensure the impeller is centered within the housing cavity re-shim the impeller according to the

procedure outlined below.

3) If blower had a seal replace the seal with a new one.

4) Place the impeller onto the shaft making sure the shaft key is in place and fasten with the bolt,

washer and spacer as applicable. Torque the impeller bolt per the table below. Once fastened

carefully rotate the impeller to be sure it turns freely.

5) Replace the cover and fasten with bolts.

6) Reconnect the power leads to the motor per the motor nameplate.

Bolt Size

Pound-Force-Foot

1/4-20

6.25 +/- 0.25

5/16-18

11.5 +/- 0.25

3/8-16

20.0 +/- 0.5

½-13

49.0 +/- 1

5/8 –11

90.0 +/- 2

Torque

Revised – June 2016