Harley Davidson Electra Glide. Service manual (1959 to 1969) — page 4

SEAT

SEAT POST SPRINGING

Two seat post spring arrangements are available for each model. A standard spring set is suitable for rider weighing up to 220 pounds. A heavy spring set for weights over that amount include heavier springs and longer guide collars. The heavy set is indicated by a letter "D" (Duo-Glide) or an "E” (Servi-Car) stamped on the upper end of the seat post plunger. See Fig. 2H-1 for cutaway view of seat post springing arrangement. Duo-Glide and Servi-Car assemblies have same number of components with following exceptions: (See Fig. 2H-2.)

Duo-Glide assembly omits seat post recoil spring (14A) and incorporates two auxiliary springs (14 and 17).

DISASSEMBLING SEAT POST (Fig. 2H-2)

Remove rod lock nut (1) and washer (2) from bottom of frame seat post tube. Pull back of seat upward sharply to break loose seat post rod nut (5) at the base of seat post tube. Unsnap clevis pin spring (3) and pull out clevis pin (4). Tip seat forward and lift out seat post assembly. Disassemble remaining parts in order indicated.

INSPECTION AND SERVICE

Wash and air dry all parts. Inspect for broken or "set" springs. New spring length appears in Fig. 2H-2 listing. Replace seat bar bushings (19) if worn appreciably.

ASSEMBLING SEAT POST (Fig. 2H-2)

Seat post assembly is reverse of disassembly. Apply liberal coating of "Grease-All" grease to parts, working it into the springs.
For correct spring preloading, draw up spring adjusting nut to compress total visible spring length to 11 in. for standard springs and 10-1/2 in. for "D"

heavy springs, on Duo-Glide assemblies; 11-1/2 in. on standard and "E" heavy Servi-Car sets. Lock with one lock nut (6). Turn on other lock nut. Position rod nut (5) on rod so bottom end of rod extends through rod nut exactly 3/4 in. Lock adjustment with second lock nut.