Relining Brake Shoes; Lubricating Brake Dust Shields; Removal And Disassembly Of Brake Unit; Regrinding Brake Drums - Cadillac 1937 LaSalle VVI Information

63
B R A K E S
6. Remove brake shoe hold-down cups and
springs.
7. Disconnect brake shoe return springs a n d
shoe connecting springs.
8. A t t a c h piston clamp, T o o l N o . J-718, to
the wheel cylinder a n d remove the brake shoes.
9. Disconnect the hand brake cables from the
hand brake operating levers at the rear brakes.
10. Check the lining wear. If linings are worn
nearly flush w i t h the rivets, install new linings.
Note: The brake shoes must be installed with
the primary shoe at the front and the
secondary shoe at the rear. The primary
shoe is identified by the letter " P "
stamped on the web near the adjusting
screw end; the secondary shoe by the
letter "S" in the same position.
11. If it is necessary to true brake drums, do
not grind out more than .030 inch over the original
limit of the inside diameter. (See Specifications.)
12. Check the steering knuckle pin bushings
for looseness.
13. Tighten the bolts that hold the dust
•shields to the rear axle and the front wheel
spindles.
14. Install the brake shoes, the brake shoe
hold-down cups a n d springs, and the return
springs a n d connecting springs. T h e piston clamp
can then be removed.
..; 15. Install the wheel hub a n d d r u m assemblies,
Ithe brake seals on Cadillac cars, a n d the wheels.
Note: Readjustment of the notched adjusting
wheel and centralization of the shoes
at the eccentric adjustment may be
_,„._.. .. necessary to permit assembly of the hubs
and drums.
16. Adjust the front wheel bearings.
17. Check the rear spring U-bolts and the
J rubber insulators between the rear axle and the
tsprings and adjust if necessary as follows:
' T i g h t e n the U-bolts w i t h uniform tension, keeping
?the lower pads flat w i t h the bottoms of the springs.
^Tighten the nuts u n t i l the rubber starts to squeeze
:.out beneath the edges of the retainers, after
Swhich tighten the lock nuts securely.
I 18. Adjust the brakes as outlined in N o t e 2.
§T." - ; ;
:7. Relining Brake Shoes
,' The brake lining used on all 37-series cars for
•service requirements is already cut to size, sur-
face ground, chamfered at the ends, drilled a n d
counterbored for the rivets, and ready for installa-
tion on the shoes. Installation is merely a matter
ot riveting the lining i n place and smoothing up
the edges of the lining around the rivet hole
counterbores.
Note: When installing new lining be sure to
clean face of shoes thoroughly before
riveting lining in place.
8. L u b r i c a t i n g Brake D u s t Shields
A popping noise m a y sometimes occur i n the
brakes when they are applied in forward speed
after h a v i n g been applied in reverse. T h i s is
generally a result of the edge of the shoe hanging
slightly on the bosses of the dust shield before
centralizing.
In such cases, the edges of the shoes should be
smoothed up where they contact w i t h the bosses
on the dust shield and lubricated slightly.
A suitable lubricant for this purpose is
furnished under specification number
G - 2 J 4 - B .
Care should be taken i n applying the lubricant
to make sure that none is permitted to get on the
brake lining.
T h i s procedure should eliminate any objec-
tionable popping. It should be remembered,
however, that the centralizing action of the
brakes may result in a slight click when the brakes
are applied in reverse. T h i s noise is hardly
noticeable and should cause no annoyance.
9. Removal and Disassembly of Brake U n i t
1. R e m o v e wheel a n d wheel hub a n d brake
d r u m assembly.
2 . Disconnect the flexible hose or brake line
assembly from the wheel unit.
Note: It is possible to dismount the dust shield
for the front brake without disconnecting
the hose, provided the assembly is sup-
ported in such a manner as to avoid
strain or damage to the hose. The line
must be disconnected for the rear dust
shield and in cases where the front brake
mechanism is to be disassembled.
3. Remove the bolts holding the dust shield
to the steering knuckle or the axle, and dismount
the complete assembly.
Note: When removing the rear brake from the
car, the hand brake cables must be dis-
connected at the lever on the frame.
4. In reassembling wheel cylinders, note that
fronts a n d rears are not interchangeable. T h e
front cylinders may be identified b y the larger
bore.
5. T o reinstall the assemblies, reverse the
aboxe^operations, and bleed the lines if they were
disconnected.
10. Regrinding Brake D r u m s
W h e n regrinding brake drums i n the service
station, the drums must not be ground d o w n more
than .030 inch beyond the original l i m i t of the
inside diameter. See Specification Table for
brake d r u m size. W h e n brake drums are too
thin, the intense heat that frequently develops
will cause them to distort and warp. T h e d r u m
thickness should be measured Vi inch from the
outer flange.
Replacement brake drums supplied by the
Parts D i v i s i o n are finished at the factory before
being shipped. This eliminates the necessity
for further finishing after installing on the wheel.