(h) Remove the three diaphragm housing screws and lockwashers, the diaphragm housing, and diaphragm housing gasket. Discard the gasket.
If the carburetor being overhauled is equipped with a dashpot, the dashpot is to be disassembled as follows.
(i) Remove the dashpot nut and lockwasher. Then remove the dashpot assembly and the remaining lockwasher.
(j) Remove the two dashpot bracket screws and lockwashers and the dashpot bracket.
E. DISASSEMBLY-AUTOMATIC CHOKE UNIT
Follow the instructions given in the Service Manual.
5. CLEANING AND INSPECTION
Adhere to the instructions and procedures given in the Service Manual. Note that parts such as the secondary throttle operating diaphragm and the dashpot should never be exposed to the cleaning solvent. Most commercial solvents will deteriorate these parts. Care must be exercised when using compressed air near these parts to avoid rupturing the diaphragms.
Inspect all parts as described in the Service Manual. In addition, check all parts in the secondary throttle operating system for signs of damage or deterioration. Some versions of this carburetor incorporate a check valve in the vacuum passage in the secondary throttle operating diaphragm housing. Examine the check valve for signs of damage and for freedom of movement. The dashpot should be inspected for damage and freedom of action, if one is fitted to the carburetor being overhauled.
The procedure for Step 10 should read as follows: Position the secondary throttle rod on the primary throttle lever and secure it in place with the rod pin. Install the upper end of the rod in the slot in the secondary throttle rod, using the washer and retainer.
(c) In Step 14, install the choke lever, using the choke lever nut and lockwasher. Disregard the information pertaining to the choke lock lever.
(d) After Step 17 has been completed, install the diaphragm housing, using a new diaphragm housing gasket.
(e) Install the diaphragm lever, using the diaphragm lever screw and lockwasher.
(f) Slip the new diaphragm and link assembly into the diaphragm housing. Place the diaphragm link on the link pin of the diaphragm lever and secure it with the new diaphragm link retainer.
(g) Set the throttle body on edge with the fuel inlet fitting pointing upward. Place the diaphragm spring on the disc in the center of the diaphragm with the wide end of the spring against the disc. Insert the four diaphragm cover screws and lockwashers in the diaphragm cover. Then, after first aligning the screws with the holes in the diaphragm and the housing, lower the cover into place. Do not tighten the cover screws until a check has been made of the alignment of the diaphragm. If the installation has been correctly made, the secondary throttle plates will be held in the fully closed position by the diaphragm spring.
(h) Using the housing cover screw and lockwasher, install the diaphragm housing cover.
Install the dashpot at this time if the.carburetor is so equipped.
(i) Install the dashpot on the dashpot bracket, using the dashpot nut and the two lockwashers. Mount the dashpot bracket on the throttle body, using the two bracket screws and lockwashers.
B. REASSEMBLY - MAIN BODY
A. REASSEMBLY - THROTTLE BODY
Use the procedure given in the Service Manual to reassemble the main body.
The reassembly procedure in the Service Manual should be followed with the following variations.
(a) Steps 2, 3, 4, 5, 6, 8, 9, and 11 are not applicable and should be disregarded.
C. REASSEMBLY - MAIN BODY ASSEMBLY TO THROTTLE BODY ASSEMBLY
The reassembly procedure given in the Service Manual should be followed with the following variations.