1928 Cadillac - GM Heritage Center

Cam forcing roller dowi
Plunger descending,
Oil supply hole
(fed from splash.
Yok«
Piston being moved
down by plunge:
Oil being forced out
of dash-pot througP
hole in valve
Oil in dash-pot
TRANSMISSION AND UNIVERSAL JOINT 101
Figs. 1 to 4
Sectional views of synchronizing yoke showing action of dash-pot plungers
Oil being forced out
of dash-pot through
assage between
valve and plunger'
Valve open under pres-
'sure of oil in dash-pot
Valve spring
impressed
Cam moving.^
away from roller
Plunger rising
underpressure^
of spring
Plunger away from
top of piston "pin
Piston being pulled
up by plunger
Passage between
plunger and piston
to give rapid refilling"
Oil returning,
to dash-pot
Fig.l
plunger descending, warm oil
tSSSS
Fig. 2
Plunger descending, cold oil
Cam off roller
lunger up
alve closed
iston against
plunger
Fig. 3 Fig. 4
3/8 inch Plunger returning to normal position. Plunger in normal position
Dash-pot refilling
i_
T-Hi i II
I -»| 1--1/2 inch \
Prying tool. Use pry bar with
shoulder to prevent burring edges
of oil supply hole. Use just enough
pressure to engage drum with cone
Clearance determined
by thickness of snap
ring in bushing.
Measured as shown
Fig. 5
Cone
Bushing-
Measure movement
of yoke from neutral
to extreme positions
Snap ring'
3/32-5/32-inch travel either
Fig.
from neutral position
Measuring travel of yoke to determine
clearance between front drum and cone.
Repeat in opposite direction for rear drum
Clearance determined by number of
gaskets under clutch connection rearbearing
cap. Measured as shown in
Fig. 5
Fig. 6
Clearance between drum and cone.
Adjustment necessary only when
installing new parts
one
February, 1929
Plate 56.
Dash pot operation and drum clearances.