Color Coded Diaphragm PPI 36 Regulator Repair Kit
Brand Name:IMPCO
Model Number:RK-COBRA
Minimum Order Quantity:24
Delivery Time:8 weeks
Payment Terms:T/T
Place of Origin:USA
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Location:
Hefei Anhui China
Address:
RM1608,Xingke Building,58Feixi Road, Hefei Anhui 230022 P.R.C
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Product Details
IMPCO RK-COBRA , Cobra Regulator Repair Kit , Diaphragms Are Color
Coded , Different Performance Characteristics
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-36 repair kit instructions will provide the
technician information to successfully repair the Cobra regulator
vaporizer. 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 regulator
being serviced. Diaphragms are color coded and have different
performance characteristics. The fluorosilicone (blue) diaphragm
material provides excellent high and low temperature durability
with increased chemical resistance and is the only diaphragm used
in the Cobra converter.
REBUILD INSTRUCTIONS
1. Under normal conditions, installation of a complete RK-COBRA kit
should be necessary only at the time of a major engine overhaul or
when the converter has been out of service for an extended period
some time. Each kit includes the necessary gaskets, diaphragms,
seals and some replacement screws.
2. Remove the 6 screws (2) from the secondary cover assembly (3).
Note the type and size of the screws removed and be sure the same
screws are used in the same locations during reassembly.
The repair kit may include additional screws to replace any screws
found damaged.
3. Loosen the secondary cover (3) by tapping around the
circumference with a plastic screwdriver handle.
4. Remove the secondary cover (3) and secondary diaphragm (4) as a
unit. Note the secondary lever (6) protruding through the metal tab
slot of the secondary diaphragm (4). Slide the cover and diaphragm
forward to free the lever from the slotted tab of the diaphragm.
Take care not to bend the lever.
5. This photo shows the secondary cover (3) and diaphragm (4)
removed and their orientation to the secondary lever (6).
6. Remove the screw (5) retaining the secondary lever fulcrum pin
(7).
7. Remove the secondary lever (6) and fulcrum pin (7) and retain
the fulcrum pin. Remove the secondary spring (9) and retain
8. Turn the converter over. Remove the seven screws (20) and lift
off the primary cover (19).
9. Remove the primary diaphragm (18).
10. Remove the body plate (14) and gasket (12) from the body (10).
Remove the “E” clip (17) from the primary valve pin (13). Remove
the spring (16).
11. Turn the plate over and remove the primary valve pin (13).
Remove the gasket (12) from the cover plate.
Clean covers, body and metal parts as necessary with a safety
solvent as needed and allow to dry prior to reassembly. Do not use
harsh solvents such as brake or carburetor cleaner on any of the
non-metallic components as they will damage the material.
12. Insert the new primary valve pin (13) into the cover plate
orifice from the top (body side) as shown.
13. Holding the valve pin (13) in place, turn the body plate (14)
over. Place the valve pin spring (16) over the valve pin with the
larger diameter end of the spring resting against the plate.
Compress the spring and secure it in place by installing the “E”
ring (17) retaining clip to the valve.
14. Install new gasket (12) making sure to align the small holes in
the gasket to the matching holes in the plate (14).
15. Set new primary diaphragm (18) on the body (10). Screw hole
spacing prevents improper orientation of the diaphragm.
16. Carefully place the primary cover (19) over the diaphragm (18).
Hand-thread the screws (20) through the cover and plate (14) into
the body (10).
17. Tighten the screws (20) and torque to 37-43 in-lb. (4.2-4.9
N•m) using a crisscross pattern.
18. Push the nose of the new secondary seat (8) through the hole in
the end of the new secondary lever (6).
19. Assemble the secondary valve components removed during
disassembly. Slide the fulcrum pin (7) through holes in the
secondary lever (6) as shown in the photo.
20. Set the secondary spring (9) on its seat on the body (10), then
position the secondary lever (6) and fulcrum pin (7) assembly on
top of the secondary spring (9). Push down until the fulcrum pin
seats and hold in place.
21. Insert screw (5).
22. Tighten screw to 29-35 in-lb. (3.3-4.0 N•m). Check the
secondary lever height. Using a straight edge, the end of the
secondary lever should 1/32" (0.794 mm) below the casting level.
NOTE: If the lever must be bent, remove from the body, bend,
reinstall and check height. Bending the lever while installed may
result in damage to the seat.
23. Align the secondary diaphragm (4) to the secondary lever (6) as
shown. The end of the lever must protrude through the tab slot on
the bottom of the new diaphragm after installation. The screw hole
spacing prevents improper positioning of secondary diaphragm.
24. Add the secondary cover (3) and install the previously removed
screws (2).
25. Tighten the screws (2) in a crisscross pattern and torque to
29-35 in-lb. (3.3-4.0 N•m) to complete the installation of the
repair kit components.
26. Apply 100 psi of air pressure to the inlet side of the
regulator and test for leaks. Draw a soap bubble across the
regulator outlet to verify that no air is flowing through the
outlet. If air escapes, the rebuild has failed and the regulator
must be replaced. Actuate the primer button (found on early models)
and the soap bubble should burst and air flow should be noted at
the converter outlet. Use soap and/or a commercial leak detector
solution to inspect the gasket seals around the perimeter of the
converter for leaks. If leaks are found, the regulator must be
replaced. If no leaks are found, the regulator can be reinstalled
and returned to service.
Color Coded Diaphragm PPI 36 Regulator Repair Kit
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