Dewalt DXCMV5048055 Instruction Manual - Page 20

Adjusting Belt Tension, Motor Pulley/Flywheel Alignment

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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 motor mounting screws enough to hold the motor in place for Downward Force checking pulley and flywheel alignment. 3. The belt should deflect Deflection 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 disconnect, 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 measurements 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 perpendicular to the drive motor shaft. Points B1 and B2 of Figure 20

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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
Downward Force
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