Manitowoc Grove TMS800E Service And Maintenance Manual page 295

TMS800E SERVICE MANUAL
Table 8-1Troubleshooting
Symptom
11. Wheel turns hard in one direction.
12. No attempt to return straight
ahead from turns/should also be
hard steering complaint.
13. Darting, wandering, oversteering.
14. Excessive backlash, freeplay.
15. Steering input not smooth.
GROVE
Probable Cause
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 mounting
distorted.
d. Linkage ball sockets seized or
binding.
e. King pins seized or binding.
f. Oil flow rate incorrect.
a. Oil flow too high.
b. Air trapped in steering gear.
c. Looseness, worn front end
parts.
d. Front end alignment
correct.
e. Overloading.
f. Rear axle not parallel.
g. Tight tie rod ends and drag
link sockets.
a. Worn universal joint.
b. Rack on piston damaged.
c. Damaged sector
splines.
d. Worn or damaged pitman arm
splines.
e. Universal joint yoke loose on
actuating shaft.
a. Worn universal joint.
b. Lack of lubrication.
c. Universal joints not phased
properly.
Published 01-29-2014, Control # 496-00
UNDERCARRIAGE
Solution
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.
c. Shim mounting
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.
e. Repair or replace.
f. Check and correct supply
pump.
a. Supply
specifications.
b. Bleed system.
c. Check and repair as required.
not d. Align front end - caster.
e. Reduce loads.
f. Check and repair as required.
g. Check rotational torque and
replace if necessary.
a. Replace universal joint.
b. Replace steering gear.
shaft/ c. Replace steering gear.
d. Replace pitman arm and/or
sector shaft.
e. Repair or replace damaged
parts.
a. Check and
required.
b. Lubricate per lube chart.
c. Re-phase columns.
to specified
pads to
pump not to
8
replace as
8-13