DAF CF65, CF75, CF85 Series . Manual — part 874
6
CF65/75/85 series
Contents
DIAGNOSTICS
1
CONTENTS
Page
Date
1.
DISC BRAKE CONSTRUCTION
1-1
200324
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1.1
Fault-finding table
1-1
200324
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2.
DRUM BRAKE CONSTRUCTION
2-1
200324
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2.1
Fault-finding table
2-1
200324
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6
DIAGNOSTICS
Contents
CF65/75/85 series
2
1
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6
CF65/75/85 series
Disc brake construction
DIAGNOSTICS
1-1
1. DISC BRAKE CONSTRUCTION
1.1 FAULT-FINDING TABLE
SYMPTOM: SQUEALING/NOISE DURING BRAKING
Possible cause
Remedy
Worn brake pads
Check brake pads and brake disc thickness
Loose parts
Check disc brake construction
Wear/damage to hub bearing
Check hub bearing play
Wear to internal parts of disc brake
construction
Check internal parts
Incorrect vehicle combination
Check vehicle combination
Incorrect front axle/rear axle brake pressure
setting
Check front axle/rear axle setting
SYMPTOM: IRREGULAR BRAKE PAD WEAR
Possible cause
Remedy
Fouled/corroded guide sleeves
Check the guide sleeves
Dirt accumulation between moving parts of the
disc brake construction
Clean the disc brake construction
Moisture and dirt on internal mechanical parts
Check and clean the brake calliper seals
Brake pad stuck in the brake calliper. Incorrect
play between brake pads and brake carrier
Check the play between brake pads and brake
carrier
1
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6
DIAGNOSTICS
Disc brake construction
CF65/75/85 series
1-2
SYMPTOM: VEHICLE PULLS TO ONE SIDE DURING BRAKING
Possible cause
Remedy
Difference in tyre pressure
Check/correct tyre pressure
Difference in tyre size
Check tyres
Different brake cylinder diameters
Check brake cylinder diameters
Broken springs in brake cylinders
Check brake cylinders
Leaking brake cylinders
Check brake cylinders
Fouled brake cylinders
Check brake cylinders for fouling
Excessive stub axle bearing play
Check stub axle bearing play
Excessive steering ball joint play
Check steering ball joint play
Excessive shackle pin play
Check shackle pin play
Incorrect vehicle combination
Check vehicle combination
Incorrect ABS operation
Check ABS operation
Brake pad stuck in the brake calliper. Incorrect
play between brake pads and brake carrier
Check the play between brake pads and brake
carrier
SYMPTOM: POOR BRAKING DECELERATION
Possible cause
Remedy
Overload due to excessive loading
Check vehicle loading condition
System pressure too low
Check pressure regulator setting
Air leakage in the brake system
Check the brake system for leakage
Insufficient braking power/poor condition of
trailer vehicle brake system
Check trailer vehicle
Pinched brake lines
Check/replace brake lines
Brake cylinder stroke too large
Check automatic brake adjuster
Frozen brake system
Check brake system
Brake components affected by road salt
Check brake components for fouling
Fouled brake cylinders
Check brake cylinders for fouling
Incorrect brake cylinder diameter
Check brake cylinders
Incorrect operation/setting of load sensing valve
Check operation/setting of load sensing valve
Incorrect vehicle combination
Check vehicle combination
Incorrect ABS operation
Check ABS operation
Brake pad stuck in the brake calliper. Incorrect
play between brake pads and brake carrier
Check the play between brake pads and brake
carrier
1
ᓻ 200324
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