Impco RKD1-20-3 User manual

June, 2012 IMPCO Technologies Inc. PPI-124 REV. A
3030 South Susan St. Page 1 of 4
Santa Ana, CA 92704
www.impcotechnologies.com
REPAIR KIT RKD1-20-3 & RKD1-20-3B
FOR 600 DIAPHRAGM INSTRUCTIONS
Important: Any maintenance, service or
repair should be performed by trained
and experienced service technicians.
Proper tools and equipment should be
used to prevent injury to the servicing
technician, property or system
components. Service repairs should
always be performed in a safe
environment and the technician should
always wear protective clothing to
prevent injury.
The IMPCO PPI-124 repair kit
instructions will provide the technician
information to successfully repair the
600 Mixer/Carburetor. Always inspect
the major casting pieces for damage,
corrosion or cracks before attempting a
service repair. Be sure the repair kit
part number you are using is correct for
the carburetor being serviced. Repair Kit, P/N RKD1-20-3 with fluorosilicone
diaphragm, plate and bushing preassembled, plus 4
screws. RKD1-20-3B is identical, but also includes a
lower bushing.
Repair Kit & Related Parts
Item Part
Number Description Repair
Kit Qty
1 B3-59 Bushing,A/V Upper 600Vf3 1
2 D1-20-3 Diaphragm, Mixer Fvmq 600 Ser 1
3 P2-61-2 Plate-Diaphragm 1
4 S1-12 SCREW,PAN HD,8-32 x 5/16 L 4
5 B3-60 Bushing,A/V Lower 600Vf3 1*
6 S1-3 Screw 10-24x5/8 -
7 NSS Body -
8 NSS Air Valve -
9 C1-32 Cover -
10 Varies Spring -
*Included in repair kit RK-D1-20-3B Only
PPI-124 REV. A IMPCO Technologies Inc. June, 2010
3030 South Susan St. Page 2 of 4
Santa Ana, CA 92704
www.impcotechnologies.com
INSTRUCTIONS:
1) Remove screws (6), cover (9), and spring (10).
Retain all of these items.
2) Remove diaphragm and air valve assembly (Items
1-4) from the body. Remove the four screws (4)
and diaphragm (2) from the air valve (8) and
discard screws (4) and diaphragm (2).
3) Inspect the body (7), cover (9) and air valve (8) for
damage and clean as necessary using a safety
solvent.
NOTE: Inspect the guide boss (shown by arrow at left
on the underside of the cover). Any unusual wear or
damage may affect performance and prematurely
wear down the upper bushing in the diaphragm
assembly.

June, 2012 IMPCO Technologies Inc. PPI-124 REV. A
3030 South Susan St. Page 3 of 4
Santa Ana, CA 92704
www.impcotechnologies.com
4) RKD1-20-3B ONLY Push the lower bushing (5)
out of the body (7), then press in the new bushing
(5), ensuring its lip is fully seated against the body
(7) as shown by the arrow at left.
5) Place new diaphragm (2) on top of air valve (8)
and align screw holes in the plate (3) and air valve
(8). Seat the larger end of the upper bushing (1)
into the bore of the air valve.
6) Align holes in the plate (3) and diaphragm (2)
assembly and insert screws (4). Finger tighten all
four screws (4), then torque to 7-10 in-lbs./0.8-1.1
Nm. Do not flatten the star lock washers.
7) Place the diaphragm (2) and air valve (8)
assembly into the body (7) and align screw holes
on the perimeter of the diaphragm (2). Insert
spring (10).
PPI-124 REV. A IMPCO Technologies Inc. June, 2010
3030 South Susan St. Page 4 of 4
Santa Ana, CA 92704
www.impcotechnologies.com
8) Place cover (9) on top of the diaphragm (2), align
holes. Insert screws (6) and finger tighten. Insert
fingers under the cover (9) and manually press
the diaphragm (2) upward to ensure the air valve
assembly easily travels up and down. Torque the
screws (6) securing the cover (9) in a criss-cross
pattern to 15-20 in-lbs./1.7-2.3 Nm.
WARNING:
IMPROPER INSTALLATION OR USE OF THIS PRODUCT MAY CAUSE
SERIOUS INJURY AND/OR PROPERTY DAMAGE.
SERVICE TECHNICIANS AND USERS
SHOULD CAREFULLY READ AND ABIDE BY THE PROVISIONS SET FORTH IN NATIONAL FIRE PROTECTION
ASSOCIATION PAMPHLET #37 FOR STATIONARY ENGINES, #52 FOR CNG VEHICULAR FUEL SYSTEMS OR #58 FOR
LPG SYSTEMS.
INSTALLERS
LPG INSTALLATIONS IN THE UNITED STATES MUST BE DONE IN ACCORDANCE WITH FEDERAL STATE OR LOCAL
LAW, WHICHEVER IS APPLICABLE AND NATIONAL FIRE PROTECTION ASSOCIATION PAMPHLET #58, STANDARD
FOR STORAGE AND HANDLING OF LIQUEFIED PETROLEUM GASES TO THE EXTENT THESE STANDARDS ARE NOT
IN VIOLATION WITH FEDERAL, STATE OR LOCAL LAW.
IN CANADA
REFER TO CAN/CGA PROPANE INSTALLATION CODES.
CNG INSTALLATIONS IN THE UNITED STATES
MUST RE DONE IN ACCORDANCE WITH FEDERAL STATE OR LOCAL LAW AND NATIONAL FIRE PROTECTION
ASSOCIATION PAMPHLET #52, COMPRESSED NATURAL GAS (CNG) VEHICULAR FUEL SYSTEMS TO THE EXTENT
THESE STANDARDS ARE NOT IN VIOLATION WITH FEDERAL, STATE OR LOCAL LAW.
IN CANADA
REFER TO CAN/CGA CNG INSTALLATION CODES.
LPG AND/OR NATURAL GAS INSTALLATIONS ON STATIONARY ENGINES
MUST RE DONE IN ACCORDANCE WITH FEDERAL, STATE OR LOCAL LAW AND NATIONAL FIRE PROTECTION
ASSOCIATION PAMPHLET #37, STATIONARY COMBUSTION ENGINES AND GAS TURBINE ENGINES, TO THE EXTENT
THESE STANDARDS ARE NOT IN VIOLATION WITH FEDERAL, STATE OR LOCAL LAW. FAILURE TO ABIDE BY THE
ABOVE WILL VOID ANY IMPCO WARRANTY ON THE PRODUCTS AND MAY CAUSE SERIES INJURY OR PROPERTY
DAMAGE.
DUE TO THE INHERENT DANGER OF GASEOUS FUELS THE IMPCO PRODUCTS SHOULD NOT BE INSTALLED OR
USED BY PERSONS NOT KNOWLEDGEABLE OF THE HAZARDS ASSOCIATED WITH THE USE OF GASEOUS FUELS.