Manitowoc Grove TMS700E Service And Maintenance Manual page 265

TMS700E SERVICE MANUAL
Symptom
7. Lubricating oil discolored or smells
bad.
8. High operating temperatures.
9. Excessive pump pressure with
steering gear in neutral.
10. Wheel turning restricted.
11. Erratic steering or mechanical
steering only.
12. Hard steering.
13. Wheel turns hard in one or both
directions.
14. Wheel turns hard in one or both
directions.
15. Wheel turns hard in one direction.
16. No attempt to return straight
ahead from turns/should also be
hard steering complaint.
Grove
Probable Cause
a. Operating temperatures too
high.
b. Change intervals too long.
c. Incorrect lubricant used.
a. Oil flow restriction.
b. Oil flow too high.
a. Pinched oil return line, high
back pressure.
b. Binding steering column.
a. Relief plungers not adjusted
properly.
a. Insufficient volume of oil.
b. Sticking pressure relief valve
in steering gear.
a. Faulty supply pump.
b. Steering out of alignment.
c. High operating temperature.
a. Dirt or foreign matter trapped
in piston relief.
b. Bent or damaged king pins
and tie rods.
c. Front end load too great.
d. Low oil level in steering
system.
a. Air in system.
b. Caster degree incorrect.
a. Metal or foreign material in
relief ball seat in piston of
steering gear.
a. No positive caster.
b. Steering column bind.
c. Steering gear
distorted.
d. Linkage ball sockets seized or
binding.
Published 01-29-2015, Control # 512-01
UNDERCARRIAGE
Solution
a. Check and correct cause of
overheating.
b. Change oil more often.
c. Drain, flush, and refill with
recommended lubricant.
a. Check back pressure.
b. Check maximum oil flow.
a. Relocate line.
b. Repair steering column.
a. Adjust relief plungers.
a. Refer
instructions.
b. Repair or replace relief valve
as required.
a. Check pump flow.
b. Align front end.
c. Locate and correct cause of
overheating.
a. Check pressure relief.
b. Repair or replace king pins
and tie rods.
c. Lighten load.
d. Fill oil reserve as required.
a. Bleed system and check for
cause of air.
b. Correct to specified degree.
a. Remove and clean relief valve
seats or replace damaged
parts.
a. Set caster
degree.
b. Check and repair U-joints and
support bearings.
mounting c. Shim
c o r r e c t p i s t o n t o b o r e
i n t e r f e r e n c e . M a k e s u r e
correct bolt length is used on
the base mount gears.
d. Check and repair or replace.
to pump servicing
8
to specified
mounting pads to
8-13