MK Products Cobramatic II - Manual (Page 17)

Cobramatic ® II Owner's Manual - Page 10
S
ECTION
D M
AINTENANCE
R
OUTINE
M
AINTENANCE
Maintenance of the torch will normally consist of a general cleaning of
the wire guide system, including tubes, drive rolls, and conduits at regular
intervals.
Remove spatter build-up from inside of nozzles with a hardwood stick.
The only parts on the Cobramatic ® system that are subject to normal wear
are the conduit, contact tips, gas cups, front body liners, wire guides, drive
and idler rolls. A supply of these parts should be maintained on hand.
If repairs do become necessary, any part can easily be replaced by qualifi ed
shop maintenance personnel.
Your Cobramatic ® II is designed to provide years of reliable service. Normal
wear and component failure may require occasional service.
The number of units in operation and the importance of minimal "down time"
will determine to what extent spare parts should be stocked on hand. The
following list comprises the most commonly replaced parts.
R
ECOMMENDED
S
PARE
P
ARTS
QTY DESCRIPTION P/N
1 Brake Solenoid w/leads 003-2096
1 Main P.C. Board 003-1977
or 1 Main P.C. Board (exchange) 006-1977
1 Front Panel P.C. Board 003-1688
or 1 Front Panel P.C. Board (exchange) 006-1688
1 Slave Motor Drive Roll 511-0206
1 Slave Motor Idler Roll 501-0207
2+ Fuse AGC 2A 250V 151-0001
T
ESTING THE
T
ORCH
M
OTOR
C
HECK
Remove the amphenol connector from the cabinet.
Using the torch amphenol, check the resistance across pins “A” and “B”
(motor leads). The resistance across the motor should be between 5-10
ohms.
If an open circuit or short exist, check the motor leads and motor
independently.
T
ESTING
T
HE
P
OTENTIOMETER
- “W” C
LOCKED
Using the torch amphenol, check the resistance across pin “D” (wiper) and
pin “C”. The resistance should vary from 0 - 5K ohms.
Check the resistance across pin “D” (wiper) and pin “G”. The resistance
should vary from 5K - 0 ohms.
T
ESTING
T
HE
M
ICRO
S
WITCH
Using the torch amphenol, check for continuity across pins “E” and “F” when
the trigger is pressed.
T
ESTING
T
HE
115 VAC C
IRCUITS
The 115 VAC circuit is protected by fuse F3. If F3 continually blows, remove
J10 (Brake Solenoid), J12 (slave motor) and J15-3,4 (115 VAC Contactor)
from the P.C. Board. Replace fuse, and retrigger system. If fuse does not
blow; isolate the problem by plugging in J10, J12, and J15-3,4 one at a time
until the fuse blows.