Terex RT700 - Page 107

TROUBLESHOOTING
RT700 Series Page 5 - 8 Issued: August 2003
FREE WHEELING
STEERING WHEEL TURNS FREELY WITH NO FEELING OF
PRESSURE AND NO ACTION ON STEERED WHEELS
-CAUSE- -REMEDY-
Steering column upper shaft is loose or damaged...................................................Tighten steering wheel nut.
Lower splines of column may be disengaged
or broken .................................................................................................................Repair or replace column.
Steering control unit meter has a lack of oil.
This can happen on start-up, after repair, or
long periods of non use ...........................................................................................Usually starting engine will cure
problem. If not, stop engine, discon
nect steer pump outlet hose and
pour in hydraulic oil to prime pump.
No flow to steering unit can becaused by:
1. Low fluid level ...................................................................................................Add fluid and check for leaks.
2. Ruptured hose.....................................................................................................Replace hose.
3. Internal steering control unit damage
due to thermal shock* ............................................................................................Replace the unit.
FREE WHEELING STEERING
WHEEL TURNS WITH SLIGHT RESISTANCE BUT
RESULTS IN LITTLE OR NO STEERED WHEEL ACTION
-CAUSE- -REMEDY-
Piston seal blown out...............................................................................................Determine cause. Correct and
replace seal.
EXCESSIVE FREE PLAY AT STEERING WHEEL
-CAUSE- -REMEDY-
Loose steering wheel nut. Steering column
shaft worn or damaged. There should be very little
free play in the unit itself.........................................................................................Repair or replace steering wheel con-
nection or column.
EXCESSIVE FREE PLAY AT STEERED WHEELS
-CAUSE- REMEDY-
Broken or worn linkage between cylinder and
steered wheels .........................................................................................................Check for loose fitting bearings and
anchor points in steering linkage
between cylinder and steered wheels.
Leaky cylinder seals................................................................................................Replace cylinder seals.