9
V. MAINTENANCE & REPLACEMENT PARTS
A. POWER CABLE
If the power cable assembly becomes damaged, it is rec-
ommended that (1) a new one be purchased, or (2) the
damaged unit be turned over to ESAB authorized repair
station for repair. The connection fittings are crimped on
at the factory by special crimping tools to ensure strong
connections and prevent leakage. A satisfactory job
cannot be done without these tools.
B. GAS AND COOLANT HOSE ASSEMBLIES
(Refer to Fig. 3)
If shielding gas or coolant hose assemblies require
replacement, loosen the two No. 10—32 x 3/16-in. set
screws on the locking nut and pull back barrel.
To replace a gas hose assembly, proceed as follows:
1. Clip off wire hose clamp (53N46) and remove hose.
2. Clean off the fitting, and then brush on some 3M type
1711 adhesive onto the fitting.
3. Slide new wire hose clamp on the new hose and insert
the hose over the grooved sealing area of the hose
fitting on the torch.
4. Using a pair of pliers, pull on the hose clamp tightly
over the grooved sealing surface and apply 1/2 twist.
Be sure to position the wire hose clamp so that the
twist does not interfere with another part or the inside
of the handle.
5. Reposition the pliers about 1/8-in. from the hose and
twist an additional 1-1/2 turns.
6. Snip off excess wire about 1/8-in. from hose and bend
the twisted ends as shown below.
To replace the coolant hose assembly, proceed as fol-
lows:
1. Snip off the ear of the hose clamp by cutting into the
sides with pliers. Then remove hose.
2. Clean off the fitting, and then brush on some 3M type
1711 adhesive onto the fitting.
3. Slide hose clamp (950626 - supplied with hose as-
sembly) over the new hose assembly.
4. Push the new hose onto the short coolant connection
tube of the torch body and tube assembly. Position
the hose clamp over the grooved section of the short
tube.
5. Crimp the ear of the hose clamp with pincers as il-
lustrated below.
6. Rotate the hose clamp so that the ear is positioned
close to the power connection tube as shown in sec-
tion “A-A” of Figure 3.
ST-21M MACHINE
TYPE MIG TORCH
690509
SETSCREW - #10-32 X 3/16" (61330907)
(Supplied with 997032) (Align hole in barrel over setscrew.)
CLAMP - 950626
LOCKING NUT - 598787
INSULATING SLEEVE - 633880
NOZZLE
(ACCESSORY)
(SEE TABLE 1)
CENTERING BUSHING - 17782
NOZZLE BODY - 633881
WIRE GUIDE, BODY & TUBE ASS'Y - 997032
INCLUDES:
WIRE GUIDE INSULATOR - 997031
A
CLAMP - 53N46
TORCH MOUNTING BRACKET - 633885
INCLUDES
SPACER - 633887
INSULATOR SLEEVE - 14N14
ACCESSORY
COOLANT HOSE
ASSY. - 17980
(29-IN. LG.)
5/8"-18 L. H.
includes:
CLAMP - 950626
POWER CABLE
ASS'Y. - 46V12
(24-IN. LG.)
7/8"-14 L. H.
GAS HOSE
ASS'Y. - 46V11
(26 - 1/2-IN. LG.)
CONDUIT
POWER/COOLANT OUT
GAS
COOLANT HOSE CLAMP
(position as shown)
Sect. A-A
EH-10 WELDING HEAD
INSULATOR SLEEVE
14N14 (SUPPLIED WITH
633885)
MOUNTING BRACKET
633885
CONNECTION BLOCK
ASS'Y. - 58V74
(SHOWN ATTACHED
TO EH-10 HEAD)
SPACER - 633887
(SUPPLIED WITH
633885)
MOUNTING ARRANGEMENT OF
ST-21 M MACHINE TORCH TO
EH-10 WELDING HEAD
5/8" — 18
CAPSCREW - 1/4"-20 X 5/8"
(Supplied with 633885)
1 3/8"
DIA.
A
(2) SETSCREW - 10-32 X 3/16" (61330907)
GASKET - 633884
END
FITTING-
996403
(Supplied with 997032)
1/8" NPT
SPATTER LINER
(SEE TABLE 1)
COLLET NUT 632811
CONTACT TUBE
(ACCESSORY)
(SEE TABLE 2)
TORCH INLET
GUIDE TIP &
TORCH LINER
(ACCESSORY)
(SEE TABLE 2)
996300
SUPPLIED
CENTERING BUSHING
REMOVAL TOOL
BARREL - 690524
