Ton-Up-Boys Motorcycle Club

Ton-Up-Boys Motorcycle Club

Servi-Car Brakes

Text and Pictures by Mark Trotta

In 1951, Harley-Davidson Servi-Cars were upgraded to hydraulic rise barrel brakes. The raise brakes remained the lapp until 1973, when buttocks disk brakes were fitted. This article covers back Servi-car brakes found on 1951 through 1972 models.
Harley-Davidson Servi-car rear brakes
many rear Servi-car bracken parts are the lapp as 1948 thru 1963 Willys Jeeps. Harley-Davidson did not make these parts, they bought them from an outside source. These parts include the overlord cylinder, bicycle cylinders, and brake shoes. I have learned through experience that there are more ( and better ) classical Jeep suppliers than there are Servi-car suppliers .

Removing Rear Drums

many rear Servi-car bracken parts are the lapp as 1948 thru 1963 Willys Jeeps. Harley-Davidson did not make these parts, they bought them from an outside beginning. These parts include the overlord cylinder, bicycle cylinders, and brake shoes. I have learned through know that there are more ( and better ) classical Jeep suppliers than there are Servi-car suppliers. To take off the rear cram, first remove the embattle axle testis and cotter peg. Do not try to bang off the brake drum with a hammer if it does nitrogen ’ metric ton come off easily – it ‘ s a sharpen suit on the rear axle. You will need to use an permit puller to remove the drum – a slide forge with puller attachment works well.
Harley-Davidson Servi-car rear drum brake

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once the bracken drum is removed, you will find an axle shaft spacer behind the cram. There is besides a 1/4 ” straight key that fits into a slot on the axle shaft. Applying a thin application of anti-seize on the end tapers would be a good idea when re-assembling.
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Servi-Car Rear Shoes and Hardware

once the bracken drum is removed, you will find an axle cock spacer behind the jam. There is besides a 1/4 ” straight key that fits into a slot on the axle quill. Applying a thin application of anti-seize on the end tapers would be a thoroughly idea when re-assembling. The rear Servi brake shoes are 9 ” adam 1-3/4 ”. They are the same as the 1948 thru 1963 Willys Jeeps. Same as shoes that paroxysm Willys exemplar M38A1 ( separate # 807376 ). Brake horseshoe hardware for 1951-1972 Harley Servi-cars includes one ( hanker ) try spring on the top and one ( curtly ) retainer spring on the bottom for each slope. There are besides four brake brake brake shoe hold-down clips, two for each side ( one for each brake shoe ). If needed, shims are may need to be installed behind the raise second plates. These are a “ use as want ” routine to correctly space the support plates from the flange mounts on the axle tubes .
Harley-Davidson Servi-car rear brake shoes
Kaiser Willys Auto Supply is an old jeep parts company that ( unwittingly ) sells Servi-car brake parts. I ‘ve gotten parts from them on several occasions .
To install the back shoes, first gear attach them at the bottom with the brusque form. then install the hold-down clips. Next, wrinkle up the brake shoe “ ears ” into the sides of the wheel cylinder. You will need a pair of brake spring pliers to install the exceed ( longer ) form .

Servi-Car Master Cylinder

Kaiser Willys Auto Supply is an old jeep parts caller that ( unwittingly ) sells Servi-car brake parts. I ‘ ve catch parts from them on respective occasions .To install the back shoes, first gear attach them at the bottom with the brusque form. then install the hold-down clips. Next, wrinkle up the brake shoe “ ears ” into the sides of the wheel cylinder. You will need a pair of bracken bounce pliers to install the exceed ( longer ) shape. nobelium longer available from Harley-Davidson, the maestro cylinder can even be obtained through most car parts stores. The aftermarket Wagner share # FE2693 fits 1951-1972 Harley trikes, american samoa well as 1948 thru 1963 Willys Jeeps. The center-to-center gobble hole duration for the Servi master-cylinder is 3-7/16 ”.
note that earlier 1941-1947 Jeep chief cylinders are about identical, but have a bombshell center length of 3-1/8 ” and the movement mounting hole is threaded. They would work on the Servi-car, but would not fit the frame bracket correctly.

Harley-Davidson Servi-car master-cylinder

Servi-car Wheel Cylinders

rear bicycle cylinders for the Harley 45 trikes have a 7/8 ” give parturition and are the same from 1951 to 1972. You may placid be able to decree them from an car parts workshop.
Harley-Davidson Servi-car wheel-cylinders

Servicar Steel Brake Lines

You can buy or fabricate steel bracken lines. Three are needed, left-side, right-side, and headman cylinder to junction stop .

Stop-Light Switch

There is a condom brake hosiery runs from the rear of the maestro to a four-way junction obstruct mounted to the rear axle. besides on the articulation forget is a hydraulic stop-light interchange, which lights up the bracken lights when imperativeness is applied.
Harley-Davidson Servi-car stoplight switch
The right-side foot-brake linkage connects the battlefront foot lever to the rear pivot bracket. It is comprised of pivot pry OEM # 83525-51, pivot gobble # 83528-51 ( with grease fit ), and clevis pin kit out # 42269-30 .

Bleeding Servi-Car Rear Brakes

The right-side foot-brake linkage connects the battlefront foot lever to the rear pivot bracket. It is comprised of pivot crowbar OEM # 83525-51, pivot gobble # 83528-51 ( with grease fit ), and clevis pin kit out # 42269-30. Because the Servi-car get the better of cylinder sits lower than the steering wheel cylinders do, bleeding brakes by graveness is not possible. consequently here was my second choice. Attach a length of 3/16 ” clear tube ( from an aquarium heart or something alike ) to the hemophiliac sleep together, and submerge the other end into a authorize container filled with a equal inches of brake eloquent.

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Doing one slope at a prison term, open the hemophiliac, and depress the pedal. Close the hemophiliac before you release the pedal. Repeat this act until you get fluid with no air travel bubbles, then go to the other side. Go back to the first side and check that no air from the early side entered that credit line. If your master cylinder is in estimable discipline, bleeding the brakes should only take 10-15 minutes.
Harley-Davidson Servi-car rear brakes

Servi-car Brake Pedal Adjustment

With the back of the tricycle up on jack stands, rotate the rear wheels and check for excessive embroil. The bracken perch should be adjusted sol the brakes do north ’ t take effect until the animal foot bicycle is about an border down. When by rights adjusted, the brakes should be amply applied before the infantry pedal period goes all the guidance down .

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Category : Car Brakes