Maintenance - Manitowoc Grove TMS700E Service And Maintenance Manual

TMS700E SERVICE MANUAL
Symptom
1. No hydraulic oil
flows in systems.
2. Slow response.
3. Pump noise
accompanied by
hydraulic oil
foaming in
reservoir.
4. Excessive
pressure buildup.
5. Specific hydraulic
system (lift, hoist,
telescope, swing)
not working.
Grove
Probable Cause
a. Low hydraulic oil level.
b. Reservoir-to-pump suction
broken or restricted. Air entering at
suction lines. Pump not priming.
c. Pump shaft sheared or disengaged.
d. Internal contamination.
a. Low hydraulic oil level.
b. Hydraulic oil temperature too high
(watery thin oil) or too low (thick
sluggish oil).
c. Faulty pump section(s).
a. Low hydraulic oil level.
b. Excessive engine speed.
c. Air entering at suction lines.
a. System relief valve set too high.
b. Restricted pump-to-control
valve supply line.
a. Leak in system.
b. Faulty hydraulic remote control valve.
c. Faulty directional control valve.
d. Poorly adjusted control in circuit.
e. Faulty hydraulic cylinder, motor, or
valve.
Published 01-29-2015, Control # 512-01

Maintenance

Troubleshooting
a. Check for leaks. Repair any found.
Add hydraulic oil to proper level.
lines b. Clean, repair, or replace lines as
necessary. Check lines for security,
a b s e n c e o f c r a c k s , a n d p r o p e r
a t ta c h m e n t . Ti g h t e n , r e pa i r, o r
replace parts as necessary.
c. If drive shaft is damaged or sheared,
remove and repair or replace as
necessary
d. Drain, flush with recommended oil
mixture, then drain and refill system
with recommended hydraulic oil.
a. Check for leaks. Repair any found.
Add hydraulic oil to proper level.
b. If too low, warm up system. As
needed, troubleshoot cooler circuit. If
too high, troubleshoot cooler circuit.
Likely suspects are in-line check
valve and related hydraulic circuits.
c. Repair or replace pump section(s) or
entire pump.
a. Check for leaks. Repair any found.
Add hydraulic oil to proper level.
b. Regulate engine speed.
c. Check all lines for security and proper
repair. Tighten, repair, or replace as
needed.
a. Using adequate pressure gauge,
a d j u s t s y s t e m r e l i e f v a l v e a s
necessary.
b. Clean, repair, or replace line as
necessary.
a. Repair leak.
b. Adjust or replace valve.
c. Replace valve.
d. Troubleshoot circuit with schematic.
Adjust hydraulic component per
schematic.
e. Replace faulty component.
HYDRAULIC SYSTEM
Solution
2-9
2