The Food and Drug Administration announced the recall yesterday of more than 4,000 cases of Kraft Real Mayonnaise with Pure Lemon Juice because the jars may contain dead insects.

The agency said the products do not constitute a serious health hazard.

Also announced yesterday were recalls of cardiac pacemakers, 436 dialysis machines, 318 Caloric microwave ovens, and 54,000 10-speed bicycles.

Nancy Glick, an FDA spokeswoman, said the mayonnaise was distributed to more than 4,000 stores in the South.

The jars can be identified by the code: OCT-3-78 A-1, OCT-12-78 A-1 and OCT-13-78 A-1.

The mayonnaise was distributed to stores in Alabama, Florida, Georgia, Kentucky, Maryland, Mississippi, North Carolina, South Carolina and Virginia.

The FDA identified the potentially defective pacemakers as ARCO Lithium-Powered models LI-2F, LI-2D, LI-3D and LI-4D.

Glick said a failure in the manufacturing process could cause the units to short-circuit, and she recommended that physicians closely monitor patients who have had the pacemakers implanted and replaced the devices when indicated.

She said ARCO Medical Products Co. of Leechburg, Pa., has sent letters to all physicians who received the units for implanation and who should have records indicating which of their patients received the recalled devices.

The FDA said it traced the problem to the 269 units after 14 pacemaker failures were reported in 1976 and 1977. There are no known reports of deaths resulting from the failures.

The dialysis machines were ordered recalled after a patient in a Toronto hospital went into a coma and subsequently died after being dialyzed on a Physio-Control Peritoneal Dialysis System manufactured in Redmond, Wash.

The FDA said an autopsy did not show that death was due to a malfunction in the dialysis machine but that careful examination of the unit showed a potential circuit problem that could prevent the system's alarm from going off.

FDA said Physio-Control Corp. is sending out modification kits to users that should be used to correct the problem in the machines.

The units were identified as model PDS2, serial numbers 1-45 and 1-170, PDS3, serial numbers 301-353 and 301-468.

The microwave ovens were identified as Caloric model ERP383 manufactured between Feb. 14 and April 7 this year.

FDA said a routine inspection found that the units failed to meet legal requirements for concealed interlocks, failed to provide proper instructions for users, and failed to have the proper labels showing.

Field corrections are being made, the agency said.

About 54,000 10-speed bicycles may have defective pedal cranks which could break and cause serious injuries to the rider, the Consumer Product Safety Commission warned yesterday.

It said the manufacturer of the bikes, Huffy Corp., of Dayton, Ohio, reported there have been 46 incidents involving breaking pedal cranks, one of which resulted in cuts to the hand, arm, and leg of a rider who fell after the pedal came off.

The bikes involved are 24-inch, 26-inch and 27-inch 10-speed lightweight models manufactured in 1977 and 1978 and sold under the Huffy, J. C. Penny, Omega, and Coast King brand names, the commission said.

The identification numbers, found on the left rear axle plate, are:

C2694; C2695; C927-7096; C2380C1; C2380C1; C2131C2; C2141C2; C927-7070; C927-7088; C927-7112; C2180C1; C927-7120; C2131C1; C2141C1; C927-7104; CZHO-8037OP; C8798T; 2380A1; 2381A1; 2131A2; 2141A2; 2180A1; 2180A2; 2131A1; and 2141A1.

"Anyone who bought a bike before May 22 of this year with one of the numbers should return it to the retailer or to an authorized Huffy service center for a free inspection and, if needed, replacement of the crank," the agency said.

Huffy service centers can be located by writing the company at P.O. Box 1204, Dayton, Ohio, 45401, attention bicycle customer service department.