DeWalt DXCMV5048055, Instruction Manual

20

English

3.  Mark pump position on saddle.
4. Loosen the motor 

V

mounting screws and 

slide the motor toward 

the air compressor.

5.  Remove the belt and 

replace with a new one.

6.  See the 

Adjusting Belt 

Tension 

before tight-

ening motor mounting 

screws.

Adjusting Belt Tension

1.   Slide motor into original position, line the motor up with the
 

 mark made earlier on saddle.

2.  Tighten two outside

Downwar

d For

ce

Deflection

motor mounting 

screws enough to hold 

the motor in place for 

checking pulley and 

flywheel alignment.

3.  The belt should deflect 

1/2” (13  mm)at mid-

way between the pul-

ley and the flywheel 

when a 10 pound 

(4.6  kg.) weight is 

applied at the midway point.

3. When proper belt tension is achieved, tighten 

all four motor mounting screws. Torque to 20-25 ft-lbs 

(27.1–33.9 Nm).

NOTE: 

Once the engine pulley has been moved from its factory set 

location, the grooves of the flywheel and pulley must be aligned 

to within 1/16” (1.6 mm) to prevent excessive belt wear. Verify the 

alignment by performing the following 

Motor  Pulley/Flywheel - 

Alignment.

Motor Pulley/Flywheel Alignment

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” (1.6 mm) to prevent excessive belt wear.
The air compressor flywheel and motor pulley must be in-line (in the 

same plane) within 1/16” (1.6 mm) to assure belt retention within 

flywheel belt grooves. To check alignment, perform the following 

steps:
1.  Set the Auto/Off lever to “Off”, shut off the main power discon-

nect, and relieve all air pressure from the air tank.

2.  Remove belt guard.
3.  Place a straightedge

against the outside of 

the flywheel and the 

motor drive pulley.

4.  Measure the distance 

between the edge of 

the belt and the straightedge at points A1 and A2 in figure.  The 

difference between measurements should be no more than 

1/16” (1.6 mm).

5.  If the difference is greater than 1/16” (1.6 mm) loosen the set 

screw holding the motor drive pulley to the shaft and adjust 

the pulley’s position on the shaft until the A1 and A2 measure-

ments are within 1/16” (1.6 mm) of each other.

6.  Tighten the motor drive pulley set screw. 
7.  Visually inspect the motor drive pulley to verify that it is per-

pendicular to the drive motor shaft. Points B1 and B2 of Figure