NMC-WOLLARD 140 - Page 114

NMC-WOLLARD 2021Truax Blvd., Eau Claire, WI 54703, Phone (715) 835-3151, Fax (715) 835-6625
M140 Tow Tractor Manual No. 46054
PAGE 2-8
CHAPTER 2 MAINTENANCE
2 TROUBLESHOOTING
AUGUST 31, 2008
BRAKE SYSTEM TROUBLESHOOTING (CONTINUED)
PROBLEM POSSIBLE CAUSE CORRECTION
Brakes
Squeal
Glazed or charged lining and/
or pads
Sand or replace linings and/or
pads
Dust or metal particles
imbedded in lining.
Sand lining with medium grit
sandpaper and clean.
Lining rivets loose. Replace shoes
Wrong lining. Replace with correct shoe and
lining assemblies.
Shoe hold-downs weak or
broken.
Replace hold-downs.
Drum damper spring missing. Install damper spring.
Pads worn or glazed. Replace pads.
Shoes improperly adjusted. Adjust shoes.
Shoes bent. Replace shoes.
Bent backing plate. Replace backing plate.
Shoe retracting springs weak
or broken.
Replace springs.
Drum too thin. Replace drum.
Lining saturated with grease or

Replace shoe and lining
assemblies
“Nervous
Pedal
(Pedal
Moves
Rapidly Up
and Down
When
Applying
Brakes)
Excessive disc distortion. Machine or replace disc.
Brake drums out-of- Turn or replace drums.
Loose wheel bearings. Adjust to remove play.
Drums loose. Tighten wheel lugs.
Rear axle bent. Replace axle.