Checking Threading Steel Pipe Joint; Checking Pump; Checking Deflate From Pump; Replacement Of Piston Cap - Baby Lock BLE3ATW Service Manual

6. Checking threading steel pipe joint

a) Set the machine for looper threading.
b) Move the lock button release lever slightly to the right.
c) Check the connecting point whether the looper threading pipe joint and threading
steel pipe is fitted each other properly .

7. Checking pump

7-1 Checking deflate from pump

Holding the pump tube 6 , push down the pump lever 15 and check if air is deflated from
pump or not.

7-2 Replacement of Piston Cap

a) Bring the pump lever to the lowest position and fix it with Scotch tape or something like that.
b) Remove bace plate.
c) Remove piston driving arm fixing screw 11 (SM3005ZU).
d) Remove piston driving arm from piston driving shaft.
(It will be easy to remove the arm from the shaft, if you push the shaft to the rightward
direction.)
e) Remove piston assembly from cylinder
(It will be easy to remove piston assenbly from cylinder, when the needle is in the lowest
position.)
f) Replace piston cap.
g) Greace piston cap a little bit.(MOLYKOTE 1125)
h) Return piston assembly to cylinder.
i) Fit piston driving arm to piston driving shaft properly and tighten fixing screw 11 (SM3005IK) firmly.
(It will be easy to fit the arm to the shaft, if you push the shaft to the leftward direction.)
j) Check and confirm whether the pump works properly or not.
k) fix bace plate.
(see p .14)
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