Yanmar YM155d Service Manual page 153

8.
STEERING AND SUSPENSION SYSTEMS
, -
2.
Front alignment:
Faulty toe-in; faulty camber
angle; faulty caster' angle.
3. Rods:
Drag rods deformed; tie-rods
deformed; pitman arm or knuckle
arm deformed.
4. Steering gear box:
Insufficient oil or grease.
Trouble
Readjust.
Add oil or grease
Probable cause Remedy
2
front tires.
1.
arm, tie-rods).
1. Tire pressure is too low.
Heavy steering.
Excessive play in
steering.
3.
king pin angles; tie-rod(s1 deformed.
I
5 . 1 Steerins pulls to
/
1. Front aliqnment:
I
Adjust
2.
Excessive up-and-down play in
kingpins.
3. Center pin worn excessively.
1 . Front alignment:
Improper toe-in, camber, or
-
one side.
5.
Grease, insufficient.
1. Joints:
Excessive backlash i n joints (gear
box, pitman arm, drag rods knuckle
Front tire shimmy.
Replace.
Replace.
Readjust.
lmproper alignment (toe-in,
camber angle, caster angle).
2. Rods:
Pitman arm, drag rod(s1 knuckle
arms, or tie-rods bent or deformed.
Change
Adjust.
3.
Tire pressure:
Different tire pressures in the
l e f t and right wheels.
1. Faulty front hub bearings.
Readjust.
Correct or replace.
Correct or replace.
Adjust.
1
4. Implement fitted improperly.
/
Attach properly.
I
I I I
front wheel securing bolts loose.
I I
5. Road or surface conditions.
2. Center pin worn; center pin
I
Tighten or replace.
bracket loose.
6.
1. Front wheel hub bearings damaged;
Strange noises.
3.
Looseness between rear wheel
hubs and splines; bolts securing
rear wheels loose.
Tighten or replace.
Tighten.