Jiangsu Niu Electric Technology N1S, Руководство по эксплуатации и техническому обслуживанию

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小牛电动
Niu Electric
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Failure diagnosis procedures for the hydraulic disc brake
No Yes
Yes No
Failure of the hydraulic
disc brake
Check the brake liquid level in the main brake
pump reservoir.
The brake liquid level is below the
lower limit scale in the reservoir.
The brake liquid level is above the
lower limit scale in the reservoir.
Add the brake liquid
to the upper limit
scale in the
reservoir. Check
the brake caliper,
brake hose and
hose joint for air
leakage.
Is there a "sponge-like" feeling
when operating the brake handle?
There is air left in the
brake system oil circuit.
Check the brake pad for wearing to the
limit mark. Check the brake disc for
excessive wearing.
Replace the brake pad and
brake disc.
1. Check the main brake pump piston surface and the oil cylinder wall surface for
excessive wearing or damages.
2. Check the main brake pump piston cup for damages, cracks or aging.
3. Check the brake caliper seal ring for damages, cracks or aging.
4. Check the brake caliper piston surface and the oil cylinder wall surface for excessive
wearing or damages.