Hudson 63 1936, Mechanical Procedure Manual

Page: 49 / 333

MECHANICAL PROCEDURE MANUAL
SECTION 4
Page 27
Vacuum Pump Trouble Chart
Condition Evidenced By Remedy
Vacuum pump not operating
Punctured vacuum pump dia-
phragm
High gas pressure or noise
Noise
Slow action of windshield wiper at
high speed or when accelerating
Oil smoke in engine exhaust, dis-
connect line between pump and
manifold, at pump and hold paper in
front of pump opening and check
for oil spray in exhaust of pump
Gas pump link striking upper dia-
phragm protector of vacuum pump
Worn vacuum pump link and rocker
arm pin
Check wiper valve lines and fittings. If
trouble is not located, disassemble
vacuum pump unit and check valves
and diaphragm
Replace vacuum pump diaphragm
Replace rocker arm pin and vacu-
urn pump link .
Replace link and rocker arm pin
ASSEMBLING—SERIES "R"
Body, Rocker Arm and Link Assembly
1. Assemble link, rocker arm and rocker arm spring in
body, insert rocker arm pin through hole in body, engaging
link and rocker arm. Use a punch and stake die cast metal of
body over end of pin in one place at each end, to retain pin
in place.
Note: It has been found that the assembly of the Rocker
arm pin can be simplified by first assembling a piece of
.240" drill rod through the rocker arm pin hole in one side
of the body far enough to engage the rocker arm and link,
then insert rocker arm pin from the opposite side, pushing
out the drill rod until the pin is in proper position. If after
assembling the rocker arm pin it is found that the rocker arm
or link does not work freely, this can be corrected by placing
a punch against the opposite end of the rocker arm pin,
tapping it lightly with a small hammer in the reverse direc-
tion from which it was assembled.
Diaphragm and Pull Rod Assembly
The diaphragm for Series "R" pump is an assembly
including protector washers and pull rod and will be
serviced as a unit.
To correctly assemble diaphragm in pump body, proceed
as follows:
1. Place diaphragm spring in position in pump body.
2. Place diaphragm assembly over spring, centering up-
per end of spring in lower protector washer.
3. Press downward on diaphragm, and at the same time
assemble slot in diaphragm pull rod over the end of the link.
Valve and Cover Assembly
1. Place outlet valve spring retainer in pump
cover, taking care not to bend or distort legs of retainer.
2. Place valve plate gasket in position.
3. Place outlet valve spring in position in spring retainer.
4. Place outlet valve on spring.
5. Place inlet valve on valve seat.
6. Place valve spring on center of inlet valve.
7. Assemble inlet valve retainer in valve plate, taking care
that shoulder of retainer fits down flush in depression in plate.
8. Place valve plate in position and secure with three
screws. Inlet valve spring must be centered properly in
spring seat in valve plate and outlet valve must be seated
properly against valve seat in valve plate.
9. Place strainer screen in position on top of cover,
making certain that it fits snugly around the gasoline inlet
and edges of cover.
10. Assemble cork gasket in cover plate and install cover
plate on top of cover assembly. Make certain that gasket
seats properly and strainer screen is not wrinkled or distorted.
11. Place fibre washer on cover plate cap screw, then
insert and tighten screw securely.
Cover Assembly
1. Push upward on rocker arm until diaphragm is level
with the body flange.
2. Place cover assembly in proper position designated by
mark on flanges made before disassembling the pump.