HELI CPD18 - 2.2.6 Service brake troubleshooting (See Table 5)

33
b) Pull the plug out to let the lead
separate.
c) Turn the switch to make the
clearance about 1mm.
d) Make sure that when you press the
brake pedal the brake lamp light at the
same time. ( See Fig.2-27)
Fig. 2-27
2.2.6 Service brake troubleshooting (See Table 5)
Table 5
Problem
Possible cause
Remedy
Poor
braking
1) Fluid leaks from brake system.
2)Poor adjustment of brake shoe clearance.
3)Brake overheating.
4)Poor contact between the brake drum and
friction piece.
5)Foreign matter adhered on friction piece.
6)Foreign matter mixed in brake fluid.
7)Poor adjustment of brake pedal.
Repair
Adjust the adjuster
Check for dragging
Readjust
Repair or replace
Check brake fluid
Adjust
Noisy
brake
1)Hardened friction piece surface or foreign
matter adhered thereto.
2)Deformed backing plate or loose bolts.
3)Deformed shoe or incorrect installation.
4)Worn friction piece.
5)Loose wheel bearing.
Repair or replace
Repair or replace
Repair or replace
Replace
Repair
Uneven
braking
1)Oil-contaminated friction piece.
2)Poor adjustment of brake shoe piece.
3)Malfunctioning sub cylinder.
4)Shoe return spring deteriorated.
5)Deflected drum.
Repair or replace
Adjust the adjuster
Repair or replace
Replace
Repair or replace
Soft or
spongy
brake
1)Brake fluid leaks from braking system.
2)Poor adjustment of brake shoe clearance.
3)Air mixed in brake system.
4)Poor adjustment of brake pedal.
Repair
Adjust the adjuster
Bleed air
Readjust