Merrow Class 70 - Merrow Class 70 Oil Meters; Class 70 Oil Meter Specs and Maintenance

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
THE MERROW MACHINE COMPANY ________________ _
15. The oil coming up from the reservoir is filtered by a bronze screw-type filter located in
the
frame above the Oil Reservoir Plate.
16. The Upper Shaft Pump provides a continuous oil flow to assure proper lubrication without
the
use of wicks. The Pump is operated from an eccentric groove in the main Upper Shafi.
The Upper Shafi Pump draws oil from the main reservoir and forces ii through the Oil Bubbler
Pipe to the Oil Bubbler Pipe Cap. Some oil is bypassed from the Oil Bubbler Pipe to the F. C.
Oil
Meter Holder and to the Upper Shaft Oil Meter Holder.
17. FRAME CAP LUBRICATION: F.C . Oil Feeder Tube supplies oil to the upper and lower
looper carrier assemblies and the cam roll bearings. The oil flows to the F.C. Oil Feeder
Tube through an oil meter which is enclosed in the F. C. Oil Meter Holder. The F . C. Oil
Meter Holder is located in the frame beside the U.S. Oil Pump Screw.
18. UPPER SHAFT LUBRICATION: The oil bypassed through the Oil Bubbler Pipe fills up the
Upper Shafi Oil Meter Holder cavity and a limited amount flows through an oil meter in the
Holder.
The oil drops into the Upper Shaft Oil Collector and is fed past the Oil Distributor
Rod located in the Upper Shaft. This action distributes the oil to the bearing surfaces of the
main
shafts on the left end of the machine, the Needle Carrier Assembly, the Upper Cutter
Carrier Assembly, and the Feed Mechanism.
19. Some of the oil not fed into the Oil Bubbler Pipe is forced along the outside of the Upper
Shaft, to the face of the Upper Cam Boss .
20. LOWER SHAFT LUBRICATION:
The Lower Shaft is lubricated by oil flowing into the
Lower Shaft Oil Meter Holder through an oil meter to the Lower Shaft. This Meter Holder is
located in the frame between the right Upper and Lower Shaft Holes. (Note Section 73, line i.)
Oil METERS
21. There are four grades available for various rates of oil flow.
22.
Oil Meters in the machine are selected at the factory to provide proper lubrication for
normal machine uses.
23. If the machine is to be used in wet locations or wet cloth is to be sewn, then the F. C. Oil
Meter and U.S. Oil Meter should be changed to grade "A" (coarse) .
24.
The following precautions are recommended:
6
a. Never allow the oil level to go below the empty "E" line on the Oil Gage.
b.
Occasionally clean the lint around the Feed Dogs and from behind the Dust Shield (do
not
use compressed air} .
c .
Clean screen on the Oil Filler Assembly if filling the machine becomes difficult.
1. To clean the screen, unscrew this assembly from the machine and clean with
compressed air or a solvent.
d. The Inlet Oil Filter is located inside the main reservoir. This may be replaced by
removing the Oil Reservoir Plate and unscrewing the filter. It may be cleaned by
soaking in solvent and blowing through ii with compressed air from the inside out.