Calliper Brake:
Brake callipers should function freely and release fully. If callipers bind we
recommend the following sequence of checks:
1.
Make sure the brake lever and lever pivot operate smoothly. They should be clean
and lightly lubricated.
2.
The inner brake cable must move freely within the outer brake cable. Inner brake
cables must be oiled or greased periodically.
3.
Brake callipers should function freely. If the callipers are tight, adjustment of the brake
centre pivot bolt may be required. Using 2 suitable 10mm spanners, hold the inner
pivot nut (C) steady with one, and loosen the outer pivot nut (D) with the other.
Carefully turn the inner pivot nut anticlockwise (loosen) until the callipers do not bind
BUT ARE NOT LOOSE. Hold the inner nut (C) in this position and tighten the outer
nut (D) so that both nuts are locked together.
If the brake lever travel becomes excessive, loosen nut (A) and unsrew adjuster (B).
This will bring the brake blocks closer to the wheel rim. When adjusted, lock nut (A)
against the brake arm.
NOTE:
Should one brake block (F) make contact with the wheel rim before the other,
the brake can be centralised. Using a hammer and a suitable punch, tap the return spring
(E) on the opposite side to the calliper/brake block that touches the rim first.
Chain:
The chain should have approximately 10mm (3/8”) of vertical movement when
checked in the centre between the front and rear sprockets. To adjust the chain tension,
slightly loosen the rear axle nuts and either pull the rear wheel backwards if the chain is
too loose, or push it forwards if the chain is too tight. Before securely re-tightening the
rear axle nuts make sure that the chain is correctly tensioned and the rear wheel runs
centrally. Oil your chain sparingly once a month by revolving the pedal cranks and apply
to each link. Wipe away excess oil with a dry cloth.
Every 6 months you should fully remove your chain from the bicycle and clean
thoroughly using paraffin. Dry the chain with a clean lint free cloth and lubricate as
instructed. If your bicycle is exposed to sandy or dusty environments regularly, more
frequent cleaning may be required.
17
CHECK HERE
OIL
OIL
D
E
F
C
A
B
Summary of Contents for JUNIOR ATB
Page 1: ...JUNIOR ATB OWNER S MANUAL MAINTENANCE GUIDE ...
Page 23: ...NOTES 22 ...
