Terex T300-1, Operator'S Manual

Page: 394 / 528

ERRATIC STEERING OR NO STEERING AT ALL
CAUSE REMEDY
Insufficient volume of oil being metered by
flow divider to steering gear induced by
foreign particles on flow divider valve,
causing the valve to hang up in the bore Polish flow divider valve to remove foreign
particles and burrs. Refer to pump servicing
instructions
HARD STEERING
CAUSE REMEDY
Faulty supply pump Refer to pump servicing procedures
Front axle overloaded Correct loading practices
Faulty steering geometry Align front end
High operating temperature Locate and correct cause of overheating
WHEEL STEERING HARD IN ONE OR BOTH DIRECTIONS
CAUSE REMEDY
Bent or damaged king pins and tie rods Repair or replace king pins and tie rods.
Refer to servicing instructions
Front end load too great for rated axle
capacity Lighten load or install larger steering gear
Fatigued by-pass valve spring in pump Replace with flow control valve assembly.
Refer to pump servicing instructions
Low oil level in steering system Fill oil reservoir as required. See “Lubrication”
Air in system Bleed system and check for cause of air
Caster and camber degree incorrect Correct to “Specifications”
Metal or foreign material caught in actuating
valve Remove actuating valve. Clean and check
parts for damage
Actuating valve worn or chipped by dirt If damage is excessive replace damaged
parts as required
WHEEL STEERING HARD IN ONE DIRECTION
CAUSE REMEDY
Broken reversing springs in steering gear Replace reversing springs and damaged
parts. Refer to repair procedures to check
for additional damage
Metal or foreign material in relief ball seat in
piston of steering gear Remove piston and clean relief valve seats
or replace damaged parts
Foreign material in relief valve Clean relief valve
393 P/N 12261-683 REVISED: January 2015