QUICK CHANGE GEAR BOX
GENERAL INSTBUCTIONS
Directions are given as viewed from front operating
Lathe breakdowns are frequently traceable to three
position
causes: first, insufficient lubrication; second, the use of
unsuitable lubricant; and third, failure on the part of the
1-Disconnect transfer rod by driving out taper pin first
operator to keep his lathe clean and free from chips and
and remove four 1/2" capscrews and take box off
dirt. Particular attention should be given to the way
machine and remove top cover plate.
surfaces, lead screw or any other moving parts where
chips or grit may lodge. Clean your lathe thoroughly
2-Remove upper shaft by removing bearing cap at right
each day.
end of box which is held in place by a 5/16" socket head
locking screw. Then remove drive gear from left end of
Damage is frequently caused by thoughtless operators
box. Shift Lever D-E to E position and tap input shaft to
constantly dropping work, chucks or face plates on the
right which will drive upper shaft through and out right
slides; using the bed for straightening shafts; leaving
end. Remove inner left end ball bearing from shaft and
tools to be trapped between the carriage and headstock
remove shaft.
or tailstock, and the unnecessary use of force by using a
length of pipe on a wrench or chuck key.
3-Remove cap from left end and remove input shaft.
The order of steps 2 and 3 may be reversed.
Unless a suitable hoist is provided to handle large
chucks or face plates, wood blocks should be made to
4-Remove lead screw or output shaft. Remove 5/8" shift
protect the lathe bed. These blocks should be 4" thick
fork support shaft by removing snap ring from groove
and long enough to cover the width of the bed. The
and sliding shaft out left end of box. Remove link from
bottom of the blocks should be shaped to fit the bed.
back side of shift fork e and remove shift fork from box.
The top may be sawed or turned to fit the outside
Remove transfer case from right end of box which is
diameter of the chuck or face plate. When finished, the
attached by two 3/8" socket head capscrews and one
blocks must be the proper height to bring the center of
3/8" hex. head capscrew. Drive out lead screw shaft.
the chuck or face plate in line with the center of the lathe
spindle. The use of these blocks under the chucks or
5-Remove counter shaft in left end compartment.
face plates when putting them on or taking them off will
Remove three 5/16"capscrews from cap at left end of
prevent damaging the bed as well as the spindle.
box and remove along with shaft. Remove reduction
gear through opening at back.
DISASSEMBLING AND ASSEMBLING LATHES
HEADSTOCK
6--Remove cluster gear shaft. Move shaft assembly to
Spindle removal is accomplished by removing adjusting
left and remove bearing from left end of cluster gear
collar from back end of spindle, then remove center nut
shaft and remove cluster gear assembly from opening at
on spindle bearing. Remove oil seal (rear) and oil seal
rear.
sleeve, then remove woodruff key and set screw and key
in double feed drive gear No. B-38A. Remove front oil
7--Reassemble in reverse order. If pump is removed be
seal plate Then drive spindle out with large wooden
sure it is placed in box first with oil lines attached.
block.
APRON
To remove long spline shaft, remove rear cap and nut
Remove tailstock and drive carriage toward end of bed.
under on shaft and drive spline shaft toward operator's
Then remove back bearings on lead screw and rod feed.
end of lathe up til large clutch gear FIG. 4 No. 1515 can
Take care in not losing 1/4" set screw that is in end of
be lifted out. Then remove smaller gear FIG. 4 No.
lead screw that keeps collar from turning. Remove pins
1512 lit., same way. Then return shaft back toward the
in lead screw and rod feed drive at opposite end.
end of lathe to lift back gears, FIG. 4 No. B-32 and No.
Remove 5/8"capscrews on ends of apron and small
B-31.
screws on and wheel bracket. Then slide rod feed and
lead screw shaft. out of drive and lower apron from
Remove pulley housing and it should be readily seen
carriage. Take care in not bending shaft.
how to remove pulley drive and small intermediate drive
shaft.
Apron is disassembled from the rear. Remove snap
lever nuts on front of lathe to remove these two clutches.
To reassemble, the operations are merely placed in the
Be sure to oil well before reassembling.
reverse.
Adjust snap lever nuts so a light force from thumb will
engage clutch. When reassembling to carriage, turn
crossfeed
8
