Power Steering System; Troubleshooting - Cub Cadet 8454 Service Manual

3. POWER STEERING SYSTEM

3.1 TROUBLESHOOTING

Symptom
- Steering wheel is
heavy to operate
- No returning to neutral
even if hand is off
steering wheel or
turning as it pleases
- Defective or incapable
operation of the
cylinder against the
turning of steering
wheel
- Steering wheel turns
reversibly
- Oil leakage
1. Shaft area
(circumference of
spline in spool)
2. Assembled area
(among housing,
spacer plate, gerotor
and end cover)
D569-W02 May-2003
K&T Saw Shop 606-678-9623 or 606-561-4983
www.mymowerparts.com
Probable Cause
1) Orbitrol unit
(1) Deflected center from the column.
(2) Abrasion due to dust on spool or
sleeve.
(3) Excessive tightening torque of
bolts (7 places) on end cover.
2) Pump
(1) Incapable drive.
(2) Worn out or in error.
(3) Defectively rated.
3) Relief valve
(1) In error (defective operation).
(2) Low pressure set.
1) Orbitrol unit
(1) Abrasion due to dust on spool or
sleeve.
(2) Deflected center from the column.
1) Orbitrol unit
(1) Air flowed in the gerotor, inlet or
engagement parts due to long
term unemployed.
2) Cylinder
(1) Air flowed in.
(2) Piston seal damaged.
1) Orbitrol unit
(1) Improper adjustment of valve
timing (when dismantling and
reassembling).
2) Pipe
(1) Improper piping of port 4.
1) Oil seal worn out
(1) Contaminated delivering oil.
2) O-ring damaged
(1) Damaged when dismantling and
reassembling term unemployed.
HYDRAULIC SYSTEM
Solution
• Correct (cause if the tightening bolt
with orbitrol is loosened free).
• Replace
• Tighten at the torque as specified
evenly.
• Repair
• Replace
• Reset pressure and oil amount.
• Replace
• Reset
• Replace
• Correct
• Bleed air
• Bleed air
• Replace
• Correct
• Correct
• Replace
• Replace
6-47