Troubleshooting guide

Chain 1/2“ x 1/8“
Check the lubrication and tension of the chain in
regular intervals. In the middle of its free length the
chain should have a minimum play(3) of 10 mm (1/4
inch). See Fig: Chain adjustments. When the play in
the chain is about 20 mm (3/4 inch) the chain must
be tightened. Otherwise it will cause abnormal wear
of the chain and sprockets. Therefore it is always
recommended to keep the chain play as little as
possible. Loosen the hub nut(2) on both sides and tense
the chain with the chain adjuster(1) when needed.
When the chain has become so long that it can no
longer be tightened with the chain adjusters it is worn
out and shall be replaced with a new one.
To replace the brake belt, remove covers as required.
To adjust the chain the hub nuts(2) should be loosened.
Loosening or tightening the nuts on the chain
adjusters will then move the hub and axle forward or
backward (1). Tighten hub nuts firmly. See Fig: Chain
adjustments.
To replace the chain, loosen the chain adjusters as much
as possible. Dismantle the chain lock(6) and remove
the chain. Use a pair of tongs for dismantling spring.
Put on a new chain and assemble the chain lock. The
spring of the chain lock should be assembled with the
closed end in the movement direction(5) of the chain.
Use a pair of tongs for dismantling and assembling
the spring (4). See Fig: Chain replacement.
NOTE! At assembly the flywheel has to be parallel with
the centerline of the frame. Otherwise the chain and
sprockets makes a lot of noise and wears out rapidly.
Then assemble the removed details as above but in
reverse order.
3
2
1
4
6
5
Monark 839 E
26
Fig: Chain adjustments
1) Chain adjuster
2) Axle nut
3) Chain play
Fig: Chain replacement
4) Lock spring
5) Movement direction
6) Chain lock