NMC-WOLLARD 140 - Brake System Trouble Shooting Chart

NMC-WOLLARD 2021Truax Blvd., Eau Claire, WI 54703, Phone (715) 835-3151, Fax (715) 835-6625
M140 Tow Tractor Manual No. 46054
PAGE 2-5
CHAPTER 2 MAINTENANCE
2 TROUBLESHOOTING
AUGUST 31, 2008
2.4 BRAKE SYSTEM TROUBLE SHOOTING CHART
PROBLEM POSSIBLE CAUSE CORRECTION
No Pedal
No Brakes
Air in system. Repair source of air entry and
bleed system
Lining and/or pads worn. Replace lining and/or pads.
Master cylinder leaking
internally.
Replace master cylinder.

cylinder.
Fill reservoir and bleed system.
Brake linkage disconnected. Re-connect.
Rear brakes not adjusted. Repair or replace adjusters and
adjust
Caliper seal or piston damage Repair or replace caliper.
Spongy
Pedal
Air in system. Repair source of air entry and
bleed system
Shoes not centered on drum. Adjust anchors to center shoes.
Drums worn or turned too thin. Replace drums.
Soft hose. Replace hose.
Shoe lining wrong thickness. Install correct lining.
Cracked brake drum. Replace drum.
Brake shoes distorted. Replace shoes.
󰀩 
Brakes
Fade
Poor lining and/or pads. Use proper lining and/or pads.
Excessive use of brakes. Reduce speed or use lower gear.
 Flush system and install

Improper drum-to-lining
contact.
Adjust shoes or grind to correct
radius.
Thin brake drums. Install new drums.
Dragging brakes. Adjust or repair cause of dragging.
Riding the brake pedal. 󰀨
needed
Excessively thin rotors. Replace rotors.