Adjusting Belt Tension; Pulley And Flywheel Alignment - DeWalt D55394 Instruction Manual

2. Allow the unit to cool.
3. Remove air compressor plug from outlet.
4. Drain air tank.
5. Locate a suitable container under pump drain plug (J).
6. Remove the dipstick/oil fill plug (K) from crank case.
7. Remove the oil drain plug (B).
8. Allow ample time for all oil to drain out. (Tilting the compressor
towards the drain plug will assist in draining.)
9. Install the oil drain plug.
10. Fill pump with D WALT synthetic compressor oil. The oil level
e
should be at "Add" on the dipstick.
11. Replace dipstick/oil fill plug and tighten securely.
Checking Belt Tension (Fig. 1)
WARNING: Hot surfaces. Risk of burn. Aftercooler, 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. Ensure motor ON/OFF switch (C) is in the OFF Position.
2. Allow the unit to cool.
3. Unplug unit.
4. Drain air tank.
5. Remove eight belt guard screws.
6. Remove outer belt cover.
7. Measure belt tension. Proper tension is achieved when a three
(3) pound weight or equivalent finger pressure applied midway
between the motor pulley and compressor flywheel causes a
1/4" (6.35 mm) deflection of the belt, if adjustment is needed see
Adjusting Belt tension under Maintenance.
8. Replace belt guard.

Adjusting Belt Tension

WARNING: Hot surfaces. Risk of burn. Aftercooler, 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. Ensure motor ON/OFF switch (C) is in the OFF position.
2. Allow the unit to cool.
3. Unplug unit.
4. Drain air tank
5. Loosen but do not remove four pump
mounting bolts.
6. Remove eight belt cover screws.
7. Remove outer belt cover.
8. Turn belt tensioning
clockwise to increase belt tension or
counterclockwise to loosen belt tension.
9. Check the belt tension again. See Step 8
in Checking Belt tension under Maintenance.
10. When tension is correct, retighten four
pump mounting bolts
18– 22 ft– lbs/24.4–29.8 Nm),
replace belt cover.
Pulley and Flywheel
Alignment
The air compressor flywheel and motor pulley
must be in-line (in the same plane) within 1/16" (1.6 mm) to ensure
belt retention within flywheel belt grooves. To check alignment:
1. Ensure motor ON/OFF switch (C) is in the OFF Position.
2. Allow the unit to cool.
3. Unplug unit.
18
(L) bolt
L
(torque to
and