Chain Tension And Alignment - Walinga Central-Vac Operator And Parts Manual

5.2.4

CHAIN TENSION AND ALIGNMENT

Rotational power to drive the airlock is provided by
an electric motor through a chain drive system. To
obtain good chain life, the chain must be properly
tensioned and the sprockets aligned. Chains that
are too tight will stretch and wear quickly or over
load the bearings. Chains that are too loose will
not transmit the power evenly and will wear out
quickly. Misaligned sprockets will rapidly wear the
chain and sprockets.
When checking chain tension and alignment,
follow this procedure:
1. Clear the area of bystanders, especially small
children.
2. Turn machine off, lock out tag out master
control panel and wait for all moving parts to
stop before starting maintenance work.
WARNING
Machine is shown with guard re-
moved for illustrative purposes only.
Do not operate machine with guard
removed.
3. Remove guard over chain drive system.
4. Pull on the middle of the slack side of the
chain. The chain is properly tensioned when
the chain will move 1/4 inch (6 mm).
5. Adjusting Tension:
a. Loosen the jam nuts on the motor base
and position bolts.
b. Turn the adjusting bolts to set the
tension. Turn both bolts the same
amount to maintain pulley alignment.
c. Check and set alignment is required.
Refer to step 6.
d. Tighten motor base bolts.
e. Tighten jam nuts.
f. Install and secure chain guard.
Fig. 5-20 TENSIONING