8-2662-11039
11. Start unit and check unloader operation (Refer to
section 8.15.a.).
1. Retainer
2. Coil assembly
3. Installation/
Removal tool
4. Enclosing tube
collar
5. O-ring
6. Enclosing tube
7. Plunger spring
8. Plunger assembly
9. Gasket
10. Valve body
11. Gasket
12. Bolt
13. Gasket, bolt
14. Piston ring
Figure 8--27 Unloader solenoid valve
1
2
3
4
5
6
7
8
9
10
11
12
13
14
c. Solenoid coil replacement
NOTE
The coil may be removed without pumping
down the unit.
1. Disconnect leads. Remove retainer. Lift off coil.
(See Figure 8--28)
2. Verify coil type, voltage and frequency of old andnew
coil. This information appears on the coil housing.
3. Place new coil over enclosing tube, retainer and con-
nect wiring.
4. Check unit operation by running Pretrip (Refer to
Section 3.5).
Use tool
torque
stem nut
to 2.8 to
20-22
ft-lbs (3.0
Mkg)
Torque 3
Bolts to
12-16 ft-lbs
Note: When installing
coil, make sure roll pin is
fitted into stem nut, and
coil seats properly onto
pin to keep it from rotating.
1
2
3
4
5
6
7
8
9
10
11
12
1. Coil Assembly
2. Stem/Enclosing Tube
Assy
3. Installation/Removal
Tool
4. Spring, Plunger
5. Plunger Assembly
6. “O” Ring
7. Valve Body
8. Gasket, Valve Body
9. Pin, Anti-Rotation (fits
into top of stem nut)
10. Bolts, Valve Body (3)
11. Washers (3)
12. Piston (use only with
hot gas bypass
unloaders)
Figure 8--28. Solenoid Coil Replacement
NOTE
Place unit in Service Mode before performing
the following operations. Refer to Section 5.2.3
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