Merrow Class 70 - Merrow Class 70 Main Cams and Shafts; Class 70 Main Cams and Shafts Details

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
P,euer Aun Pivot
Roll Suew 88 ht
U.C. C. S1v
M -54
CLASS 70 INSTRUCTION BOOK
Upper Com
S0<lr.et S<rcw 31
US Oil OiJlfibvlO
Rod (SI
Plu~r M·19e•1~ -
SCrew9
Upper Shoh Ais'y include,
U.S. flongo Au·y
U.S.f. Coske1 lo-ring)
U.S. 0;1 0i"11butor
Rod (S.)
S<rewi f2J 2 '4t
I
I
(
,I
INCHES
I
2
MM
I ,I
I I
l 5
lower Com
Soclce1 S<:rew 32
1
/4
Upp,e, Cvnc,1 Co11ier Ao y
M ,S :7 - Au·y I
c_ __ U C.C Ecc fllo <. k
M- 55 ➔ 3
MAIN CAMS- MAIN SHAFTS
Ho .nd Wheel ,nct"dei
Goile1 (o 11i,gl M 215 9
Screw 4
1
/4
Sc rew 7
1
/4
Hand Wheel CJ,101d--- --'
Screw 103 ~ ..
Woiher A
1
i.
3. Remove Screw 2-1 / 2, now insert a 7/ 32 Screw several turns into the U.S. Oil
Meter Holder M-137-5 . Pull this part up and out of the machine. Note: When
replacing U.S. 0 . M. Holder M-137-5, place pointed projection on this part into
the hole in U. S. Oil Collector M-137-3.
4. Insert a 1/8 Screw several turns into the U.S. Oil Collector M-137-3 and remove
from the machine.
NOTE: When replacing U.S . Oil Collector M-137-3, place into the machine with
the hole in the large end pointing upward.
5. Loosen the Socket Screw 32-1/4 in the Upper Cam .
6. Pull the Upper Shaft Assembly out until the end of the eccentric cul on the Upper
Shaft
strikes the U. C. C. Eccentric Block (about 1/ 2 inch) (12 mm). While exert -
ing pressure to pull the Upper Shaft Assembly further out, move the Upper Culler
Carrier Assembly up and down. This action will allow removal of the Upper Shaft
Assembly and lhe Upper Cam.
NOTE: If it is necessary to use a rod to loosen the Upper Shaft Assembly from
its bearings, use a soft rod of between 1/4" (6. 5 mm) and 3/ 8" (9. 5 mm)
diameter.
21