Dewalt DXCMV7518075 Instruction Manual - Page 19

Adjusting Belt Tension, Motor Pulley/Flywheel Alignment

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English parts. Hot surfaces. Risk of burn. Pump head, and surrounding parts are very hot, do not touch (see the HotSurfaces identified in Fig. 2). Allow compressor to cool prior to servicing. 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 the front of the beltguard by removing R the screws and wash- ers (R) using a Torx T25 bit. 3. Mark pump position on saddle. 4. Loosen the motor 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 tightening 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 checking pulley and flywheel alignment. Downward Force Deflection 3. The belt should deflect 1/2" (13 mm)at midway between the pulley 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). 19

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19
English
parts. Hot surfaces. Risk of burn. Pump head, and surrounding
parts are very hot, do not touch (see the Hot Surfaces identified
in Fig. 2). Allow compressor to cool prior to servicing.
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 the front of the
R
beltguard by removing
the screws and wash
-
ers (R) using a Torx T25
bit.
3.
Mark pump position on
saddle.
4.
Loosen
the
motor
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 tightening 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
checking pulley and fly
-
wheel alignment.
3. The belt should deflect 1/2” (13  mm)at midway between the
pulley 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).
Downward Force
Deflection