1948-1952 Shop Service Manual - - Hudson-Essex-Terraplane Club

9 - 12 OVERDRIVE
DISASSEMBLY OF HOUSING
2. Remove the overdrive mainshaft oil seal (46) with
Remover J-943.
3. Remove the two bearing snap rings (44) and remove
overdrive mainshaft rear bearing (45).
CLEANING AND INSPECTION
As each part is removed from the assembly, wash it with
clean solvent and wipe dry. Protect parts from subsequent
dirt accumulation.
After cleaning give parts visual inspection for wear or
damage. Replace any broken or excessively worn parts.
Roller clutch parts should be carefully inspected. If rollers
show surface markings of any kind they should be replaced.
If inner surface of the outer roll shows slight lengthwise
indentations, they are normal and do not impair the action
of the clutch. However, if the 12 flat surfaces of the cam
show such markings, it should be replaced.
Inspect fit and tension of the balk ring on hub as follows:
(a) When pushing one end of balk ring away from opposite
end, ring should slide around the hub.
(b) Push one end toward the other, the balk ring should grab
and hold to the hub. If the ring does not hold, it should be
replaced.
Test the tension of the cam retaining springs after the cam
assembly has been thoroughly washed. The springs are
designed to twist the cam in a clockwise direction to hold
the rollers up on the cam.
NOTE: If the spring tension is weak or retarded, the unit
will free-wheel at all times.
To check spring tension, hold hub of cam and turn roller
retainer counter-clockwise; suddenly releasing the retainer
should cause the retainer to spring back quickly. If the
action is slow or retarded, replace springs or complete assembly.
BEARINGS:
DO NOT place bearings where dirt is liable to mix with
the lubricant in the bearings.
Bearings should be washed in clean gasoline or kerosene.
DO NOT SPIN the bearings and particularly do not spin
bearings with an
bearings with an air hose. Spinning a bearing at high speeds
will almost certainly do considerable damage. After washing
the bearings, blow them out with clean dry air. Direct the
flow of air into the open face of the bearing while holding the
inner race and slowly rotate the outer race by hand. DO
NOT ALLOW the air to spin the bearing.
(a) Inspect the bearing for cracks and defects.
(b) Lubricate the bearing with clean, new engine oil,
rotating the bearings by hand in order to spread the
lubricant over all surfaces.
Transmission mainshaft be a rings are built originally with
end play and although they may feel quite loose, it does not
necessarily indicate that they are worn and unfit for use.
GEARS:
Inspect all gears for damaged teeth. Remove any and all
raised edges from tooth surfaces by hand stoning. Pitted and
worn gears should be replaced.
CONTROL SHAFT AND SEAL:
Recommended clearance between control shaft and overdrive
housing bore is .001" to .003" but clearance of twice this
amount if not accompanied by oil leakage is permissible.
If a new control shaft seal is Installed make sure that it does
not interfere with rotation of control shaft.
OVERDRIVE MAINSHAFT OIL SEAL:
If the seal is hard, cracked, or glazed, or if signs of oil
leakage are apparent at disassembly, Install a new seal.
OVERDRIVE SHIFT RAIL
DISASSEMBLY: (Single Lever Type)
Drive out shift rail pin (2), Figure 20, remove sleeve (1),
spring (3) and shifter fork (4).
Check weight of shift rail springs. The shift rail sleeve
spring (3) should have a free length of 2-7/32" and 1-25/64"
length under load of eight pounds. The retractor spring in
housing has a free length of 2-3/4" and 1-21/32" under load
of 12 pounds.