Multiquip MP150SDLTE Troubleshooting Trailer Brakes, Surge Brake Troubleshooting, Symptom

TROUBLESHOOTING (TRAILER BRAKES)

Table 11. Surge Brake Troubleshooting

Symptom	Possible Cause	Solution
No Brakes	Brake line broken or kinked?	Repair or replace.
	Brake lining glazed?	Reburnish or replace.
	Trailer overloaded?	Correct weight.
Weak Brakes or Brakes Pull to One Side	Brake drums scored or grooved?	Machine or replace.
	Tire pressure correct?	Inflate all tires equally.
	Tires unmatched on the same axle?	Match tires.
Locking Brakes	Brake components loose, bent or broken?	Replace components.
	Brake drums out-of-round?	Replace.
Noisy Brakes	System lubricated?	Lubricate.
	Brake components correct?	Replace and correct.
	Brake lining thickness correct or in right wrong position?	Install new shoes and linings.
Dragging Brakes
	Enough brake fluid or correct fluid?	Replace rubber parts
		fill with Dot 4 fluid.

Table 12. Electric Brake Troubleshooting

Symptom	Possible Cause	Solution
	Any open circuits or broken wires?	Find and correct.
	Any short circuits?	Find and correct.
No Brakes or Intermittent Brakes	Faulty controller?	Test and correct.
	Any loose connections?	Find and repair.
	Ground wire secure?	Find and secure.
	Grease or oil on magnets or linings?	Clean or replace.
Weak Brakes or Brakes Pull to One Side	Connections corroded?	Clean and correct cause of corrosion.
	Brake drums scored or grooved?	Machine or replace.
	Brakes synchronized?	Correct.
Locking Brakes	Brake components loose, bent or broken?	Replace components.
	Brake drums out-of-round?	Replace.
Noisy Brakes	System lubricated?	Lubricate.
	Brake components correct?	Replace and correct.
Dragging Brakes	Bearings of the wheel adjusted?	Adjust.

PAGE 56 —DRY PRIME PUMP — OPERATION MANUAL — REV. #3 (10/06/08)