Allmand Brothers TLB6235 Tractor - Manual (Page 33)

33
*Thermal Shock is defined on the following page.
STEERING (continued)
PROBLEM POSSIBLE CAUSE CORRECTION
Leakage of cylinder piston
seals or accessory valve
between cylinder line or
ports
Replace seals or
accessory valve
Worn steering control unit
meter
Replace steering
control unit
TEMPORARY
HARD STEERING
OR HANG-UP
*Thermal shock
Check unit for proper
operation and cause of
thermal shock
Air in system due to low
level of oil, cavitation of
pump, leaky
fitting,pinched hose, etc.
Correct condition and
add fluid
Loose cylinder piston Replace cylinder
*Thermal shock damage
Replace steering
control unit
Sticking flow control
cartridge in gear pump
Replace flow control
cartridge or gear pump
Air in hydraulic system.
Most likely air trapped in
cylinder or lines
Bleed air out of system
Low fluid level
Add fluid and check for
leaks
Steering column upper
shaft is loose or damaged
Tighten steering wheel
nut
Steering control unit meter
has a lack of oil. This can
happen in start-up, after
repair, or long periods of
non-use
Usually starting engine
and allowing hydraulic
oil to circulate will cure
the problem
No flow to steering control
unit-- Can be caused by:
Low fluid level
Add fluid and check for
leaks
Ruptured hose Replace hose
Internal steeering control
unit damage due to
"Thermal Shock"
Replace the steering
conrol unit
SLIP-SLOW
MOVEMENT OF
STEERING
WHEEL FAILS TO
CAUSE ANDY
MOVEMENT OF
STEERED
WHEELS
ERRATIC
STEERING
"SPONGY" OR
SOFT STEERING
FREE WHEELING--
STEERING
WHEEL TURNS
FREELY WITH NO
FEELING OF
PRESSURE AND
NO ACTION OF
STEERED
WHEELS