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 TROUBLE
PROBABLE CAUSE
REMEDY
2. Brake backing plate loose
Tighten or replace backing plate.
d. Brake releases slowly
1. Hydraulic fluid congealed
Drain, flush and replace with
proper brake fluid.
2. Master cylinder maladjusted
Drain, clean or adjust as
or dirty
necessary.
3. Retraction of brake shoes
Clean, adjust or replace springs
restricted by weak return
as necessary.
springs or dirt.
e. Truck pulls to one side
1. Brake linings grease soaked
Replace brake linings.
f. Brakes drag
1. Mineral base oil in brake system
Drain and flush system, replace
parts and service brake system.
2. Linings grease soaked
Replace brake linings.
5-91. STEERING.
a. Difficult steering or
1.
Steering gear out of adjustment
Readjust steering gear.
wandering
2.
Damaged drag link
Replace drag link.
3.
Defective steering gear
Replace or overhaul steering gear.
4.
Excessive leakage of fluid
Check for leaks, correct and fill
with proper fluid.
b. Fluctuating pressure
1. Faulty operation of relief valve
Flush and refill system. if condition
still exists, overhaul valve assembly.
c. Loss of system pressure
1. Slippage of pump drive, other
Check pump, replace or overhaul
pump malfunction
pump as required
d. Cylinder piston rod
1. Cramping of linkage
Replace defective unit and readjust
binding or sticking
pitman arm stops.
e. Chatter conditions
1. Loose mountings or linkage
Make certain all ball stud mounting
2. Relief valve set too low
and other linkage is tight. Check
3. Insufficient pump flow
pitman arm stops to be certain the
arm strikes the stops slightly before
the steering knuckles contact the
stops on the axle. Set relief valve
at least 150 psi higher than normal
steering requirements of the vehicle.
Bleed air from system. Insufficient
pump flow at idle speeds can be
corrected by increasing engine idle
rpm.
f. Unsatisfactory steering
1. Air in system
Replace cylinder packings.
in either direction
2. Excessive wear in steering
cylinder
Replace or overhaul cylinder.
3. Incorrect system pressure
Reset pressure.
48
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