Monark 839 E, Manual

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Monark Ergomedic 839 E
34
Ser
vice
4
6
5
8.8 Chain 1/2” x 1/8”
It is strongly recommended to keep the chain
clean. Dirt build-up on the chain will cause ex-
cess wear. A chain lubricant and solvent for nor-
mal road bikes may be used.
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 of 10 mm
(1/4in). 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 chin and chain wheels. Be-
cause of this it is always recommended to keep
the chain play as little as possible. 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.
Loosen the lower chain guard bracket. Remove
the screw for the right chain guard, back. To take
away the chain guard, push it backwards. Take
off the front chain guard, right and left side.
To adjust the chain the hub nuts should be loo-
sened. The hub and axle is then moved forward
or backward by loosening or tightening the nuts
of the chain tensioners. Tighten the nuts on the
hub axle and the chain should be at the proper
tension.
The spring of the chain lock should be assembled
with the closed end in the movement direction of
the chain. Use a pair of tongs for dismantling and
assembling the spring.
NOTE: At assembly the flywheel has to be paral-
lel with the centerline of the frame otherwise the
chain and chain wheels makes a lot of noise and
wears out rapidly.
3
2
1
8.9 Crank bearing
The crank bearing is long term greased and needs
normally no supplementary lubrication. If pro-
blem arises, please contact your Monark dealer.
Fig: Chain replacement
4) Lock spring
5) Movement direction
6) Chain lock
Fig: Chain adjustments
1) Chain adjuster
2) Axel nut
3) Chain play