Industrial Air IV5076055, Operator'S Manual

10 - ENG

200-2927

MAINTENANCE

NOTE:   

Once the motor pulley has been moved from its factory  

set location, the grooves of the flywheel and pulley must  

be aligned to within 1/16” to prevent excessive belt wear.

To check pulley alignment, remove the belt guard and place 

a straightedge (see 

A

) against the pump flywheel (see 

B

) (See 

Fig. 9

). Measure and record the distance from the straightedge to 

the edge of the drive belt at point C. Then measure the distance 

from the straightedge to the edge of the drive belt again at points 

D and E. Both distances should be the same as at point C. If D 

or E are different from C, there is a misalignment which must 

be corrected before the compressor is run. To correct a pulley 

misalignment, use the following procedure.
1.  Remove the front of the belt guard by removing the screws  

using a Torx T25 bit.

2.  Loosen the motor mounting bolts.

3.  Remove the 2 screws and lock washers from the hub using a  

7/16” wrench.

4.  Insert the screws into the threaded holes on the hub and    

tighten to pull hub away from sheave, remove screws.

5.  Align the motor pulley with the pump flywheel (C-D-E must  

be equal ).

6.  Replace hub by aligning non-threaded holes in hub to holes  

in sheave. Insert screws and lock washers and tighten.

7.  Adjust the proper belt tension.

8.  Retighten the motor mounting bolts to 130-180 in.-lbs.

9.  Reinstall the belt guard. All moving parts must be guarded.

This unit starts automatically.  

  ALWAYS shut off the main power disconnect, and  

  bleed all pressure from the system before servicing  

  the compressor, and when the compressor is not in  

use. Do not use the unit with the shrouds or belt    

guard removed. Serious injury could occur from    

contact with moving parts.

1.  Remove the front of the belt guard by removing the screws  

using a Torx T25 bit. 

2.  Loosen the motor mounting bolts.

3.  Shift the motor towards the pump to the point where the belts  

can be easily removed and installed.

4.  Remove and replace belts. NOTE: The belts must be  

centered over the grooves on the flywheel and motor pulley.

5.  Shift the motor back to the point where the correct deflection  

exists (see “Drive Belt Tension Adjustment”).

6.  Retighten the motor mounting bolts to 130-180 in.-lbs.

7.  Check to ensure that the tension remained correct.

8.  Reinstall the belt guard. All moving parts must be guarded.

This unit starts automatically.  

  ALWAYS shut off the main power disconnect, and  

  bleed all pressure from the system before servicing  

  the compressor, and when the compressor is not in  

use. Do not use the unit with the shrouds or belt    

guard removed. Serious injury could occur from    

contact with moving parts.

1.  Shut OFF the main power  

disconnect. Relieve all  

the air pressure from the tank  

(refer to “Shutdown” in  

Operating Instructions).  

Make sure the compressor  

has cooled down before  

 servicing.

2.  Using the appropriately  

sized wrench, loosen the  

compression nuts (A) on  

the check valve (B) and  

pump head (C). Remove  

the transfer tube (D).

3.  Using the appropriately  

sized wrench, loosen the  

compression nut (F) from the  

connector (G), located on the  

side of the check valve.  

Remove the bleeder tube  

 (E).

4.  Making note of the orientation for  

reassembly, unscrew the check valve from  

the tank (counterclockwise) using the    

appropriately sized wrench. 

5.  Using a pencil or screwdriver, carefully    

push the valve disc up and down. If the    

valve disc does not move freely up and    

down, the check valve needs to be  

cleaned or replaced.

6.   Clean the check valve with warm soapy   

water and make sure to dry thoroughly    

before reinstalling. If the disc valve still    

does not move freely up and down, it will  

need to be replaced. 

7.  Apply thread sealant to the check valve threads and reinstall  

into the tank by turning clockwise. Make sure it is the  

same orientation as when it was removed. 

8.  Replace the bleeder tube and tighten compression nut.

9.  Replace the transfer tube and tighten compression nuts.

Fig. 9

TO REPLACE OR CLEAN CHECK VALVE

WARNING:

DRIVE BELT REPLACEMENT

WARNING: