Lincoln Electric 3.1 - Manual (Page 14)

ROUTINE MAINTENANCE
Every 3 months, check the integrity of the outside of
the extraction arm and clean it with a non-agressive
detergent.
Every 12 months:
• Check the flexible hoses and rubber seals for cracks
or damage; replace if necessary.
• Check the inside of the extraction arm and clean it
thoroughly.
• Check and lubricate the hinge points with lubricating
oil. (See Fig. 10 C)
• Check and lubricate the steel cable near the balance
wheel with lubricating grease. (See Fig. 10 B)
• Check the steel cables for wear.
• Check and adjust the friction setting of the hood,
middle, and base hinges. (See Fig. 10 A, Fig. 11)
• Check the balance construction of the extraction
arm. (See Fig. 10 A)
• Check the operation of the airflow throttle valve.
C
F
B
360 °
B
C
A A C C
C(2x) A
A
C(2x)
A
C
B
C-1 MAINTENANCE C-1
LFA 3.1 & 4.1 FUME EXTRACTION ARMS
Fig. 10
B
B
Fig. 11
Adjust friction
with a wrench
Lubricate
with grease
Lubricate
with oil