Manitowoc Grove RT765E-2 Service And Maintenance Manual page 208
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- Operator's manual (156 pages) ,
- Operator's manual (178 pages)
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SWING SYSTEM
Symptom
2.
Boom swing
operation erratic in
one direction only.
3.
Boom will not swing
in either direction.
4.
Swing operation
slow in either
direction.
6-4
Probable Cause
a.
Crane not level.
b. Turntable bearing binding due to
continuous limited swing. (Example:
concrete pourer.)
c.
Restricted hose or fitting.
d. Damaged swing directional control
valve.
e.
Damaged swing pinion.
f.
Damaged turntable bearing.
a.
Damaged relief valve.
b. Damaged swing motor.
c.
Swing brake not releasing properly.
d. Damaged hydraulic remote control
valve.
e.
Internal damage to swing box.
f.
Worn or damaged hydraulic pump.
g. Damaged swing directional control
valve.
h. Damaged swing pinion.
i.
Damaged turntable bearing.
j.
Excessive overload.
a.
Damaged relief valve.
b. Improperly adjusted swing brake.
c.
Damaged hydraulic remote control
valve.
d. Improperly lubricated swing bearing.
e.
Improper size hose and/or fittings
installed.
f.
Clogged or restricted hydraulic hoses
or fittings.
g. Worn
or
damaged
bearings
h. Worn or damaged swing motor.
i.
Worn or damaged hydraulic pump.
j.
Crane not level.
k.
Damaged swing directional control
valve.
Published 9-04-2014, Control # 422-08
RT765E-2 SERVICE MANUAL
a.
Level crane using outriggers.
b. Rotate machine 360 degrees in both
directions several times and lubricate
bearing.
c.
Replace hose or fitting.
d. Replace
valve.
e.
Replace pinion.
f.
Replace turntable bearing.
a.
Remove, clean, and repair or replace
relief valve.
b. Repair or replace swing motor.
c.
Repair as necessary.
d. Replace
valve.
e.
Remove swing box and repair.
f.
Replace pump section.
g. Replace
valve.
h. Replace pinion.
i.
Replace turntable bearing.
j.
Reduce load. Refer to load capacity
chart.
a.
Adjust, repair or replace valve.
b. Readjust.
c.
Replace
valve.
d. Lubricate bearing per
recommendations. Refer to
Lubrication, page 9-1.
e.
Replace hose or fittings. Refer to the
Manitowoc Crane Care Parts Manual.
f.
Clean or replace damaged parts.
output
shaft
g. Replace bearings.
h. Repair or replace motor.
i.
Repair or replace pump.
j.
Level crane.
k.
Replace
valve.
Solution
swing
directional
control
hydraulic
remote
control
swing
directional
control
hydraulic
remote
control
swing
directional
control
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- Electrical System
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Troubleshooting
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Questions and answers
Cummins QSB 6.7 diesel engine not starting
The provided context does not contain specific troubleshooting steps for why the Cummins QSB 6.7 diesel engine in the Manitowoc Grove RT765E-2 might not start. However, common reasons for a diesel engine failing to start include:
1. Fuel Issues – Low or contaminated fuel, clogged fuel filters, or air in the fuel system.
2. Battery Problems – Weak or dead battery preventing proper cranking.
3. Starter Motor Failure – Faulty starter preventing engine turnover.
4. DPF Regeneration Interruption – If the Diesel Particulate Filter (DPF) regeneration was interrupted, it could affect engine performance.
5. Electrical or Sensor Faults – Wiring issues, faulty sensors, or an inactive safety switch.
If the engine does not start, checking these possible causes is recommended.
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Cummins diesel engine QSB 6.7 cranking but failing to start what could be the problem
Possible reasons why a Manitowoc Grove RT765E-2 with a Cummins QSB 6.7 diesel engine is cranking but failing to start could include:
1. Fuel Issues
- Insufficient or contaminated fuel.
- Clogged fuel filter or fuel lines.
- Faulty fuel pump preventing fuel delivery.
2. Air Intake Problems
- Blocked or restricted air filter.
- Turbocharger failure affecting air intake.
3. Electrical Issues
- Weak or faulty battery preventing proper cranking speed.
- Faulty starter motor or wiring connections.
- Malfunctioning engine control module (ECM).
4. Injection System Failure
- Faulty fuel injectors or injection pump.
- Air trapped in the fuel system.
5. Sensor or Control Failures
- Malfunctioning crankshaft or camshaft position sensor preventing proper timing.
- Faulty engine temperature sensor or other control module issues.
6. Low Oil Pressure or Safety Shutoff
- Engine protection systems preventing startup due to low oil pressure or other safety concerns.
Checking fuel supply, air intake, battery condition, and diagnostic codes can help identify the issue.
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