Constant Speed Head Unloader Kit - Champion R15B Operation & Maintenance Manual

NOTE: This is optional equipment and may not be included on your unit.
The purpose of constant speed unloading is to provide a means of stopping or starting the compression of air by the compressor
without stopping or starting the electric motor or gasoline engine after each cycle.
To accomplish this, an air pilot valve is used to replace the pressure switch used for stop-start operation. The pilot valve senses
storage tank pressure, and when the pressure is raised to a predetermined setting, this air is released to an intake valve hold-open
mechanism. The compressor stops compressing air and runs free until the pilot valve senses that the pressure in the tank has
dropped to the predetermined setting. At this time the air is released from the intake valve hold-open mechanism, and the
compressor starts compressing air again.
The parts called out below replace or are substituted for those found in the regular parts list.
TYPICAL MINIFOLD ASSEMBLY
FOR HEAD UNLOADERS
CONSTANT SPEED HEAD UNLOADER KIT Z9144
For Air Compressor Pump Models R-10D and R-15B
REF. NO.
REF. NO.
Z9144 - CAPTURED UNLOADER VALVE
TOTAL PART NO.
REQ'D
- 1 Z6312
1 1 P09670C
2 1 P02306B
3 1 P09923A
4 1 P02547A
5 1 Z4877
6 1 P09085A
7 1 P09084A
8 1 P09086A
9 1 P09083A
TOTAL PART NO.
REQ
- 1 Z9143
1 1 P12304B
2 1 P02306B
3 1 P09923A
4 1 P02547A
5 1 Z6308
6 1 P09297A
7 1 P01882A
8 1 P09086A
9 1 P09296A
10 1 P00746A
11 1 P09171A
REF. TOTAL PART NO.
NO. REQ'D
12 1 M2879
13 1 Z9172
14 1 M2868
15 1 P12323A
16 1 M2853
17 1 M2881
18 1 M3465
19 1 M807
20 1 M2868
22
R-10D, R-15B
LOW PRESSURE
LP Intake Manifold Group (includes 1,2,3,4)
LP Intake Manifold
Cylinder
Unloader Piston
O-Ring
LP Valve Assembly
(includes 6,7,8,9)
Unloader Finger
Unloader Spring
Locknut
Guide Stem
HIGH PRESSURE
Z9143 HP
HP Intake Manifold Goup
(Includes items 1,2,3,4,10)
HP Intake Manifold
Cylinder
Unloader Piston
O-Ring
HP Valve Assembly
(includes 6,7,8,9)
Unloader Finger
Unloader Spring
Locknut
Guide System
Cylinder Gasket
Valve Gasket
(not included)
HIGH & LOW PRESSURE
Compression Fitting
Manifold Tube
Compression Fitting
Actuating Tube
Pilot Valve
Compression Fitting
Screw, Hex Head Cap
Mounting bracket
Compression Fitting