Manitowoc Grove RT765E-2 Service And Maintenance Manual page 169
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- Operator's manual (156 pages) ,
- Operator's manual (178 pages)
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RT765E-2 SERVICE MANUAL
SYMPTOM
3.
Telescope
cylinder will not
extend.
4.
Telescope
cylinder will not
retract.
5.
Inner mid will not
extend.
6.
Inner mid will not
retract.
7.
Outer mid will
not extend.
8.
Inner mid
retracts before
outer mid.
9.
Outer mid
extends only a
short distance
then stops.
GROVE
PROBABLE CAUSE
a.
Low hydraulic oil level.
b. Relief valve malfunctioning.
c.
Excessive load.
d. Clogged hose and fittings.
e.
Broken valve spool.
f.
Damaged piston seals.
g. Damaged piston(s).
h. Bent boom section(s).
i.
Broken hydraulic pump coupling.
j.
Worn or damaged hydraulic pump
section.
a.
Low hydraulic oil level.
b. Relief valve damaged.
c.
Excessive load.
d. Inoperative check valve.
e.
Clogged hose and fittings.
f.
Broken valve spool.
g. Broken piston(s).
h. Damaged piston seals.
i.
Bent boom section(s).
j.
Broken hydraulic pump coupling.
k.
Worn or damaged hydraulic pump.
l.
Broken hydraulic pump shaft.
a.
Right side check valve blocked.
a.
Right side check valve closed.
a.
Left side check valve is closed.
a.
Right side check valve is open or
hosed backwards.
a.
Left check valve is open or hosed
backwards.
Published 9-04-2014, Control # 422-08
SOLUTION
a.
Check system for leaks. Make repairs as
needed. Fill reservoir.
b. Repair or replace relief valve.
c.
Reduce load.
d. Replace hose or fittings. (Refer to
Manitowoc Crane Care Parts Manual).
e.
Replace valve.
f.
Replace all cylinder seals.
g. Replace piston(s) and all cylinder seals.
h. Replace damaged boom section(s).
i.
Replace broken hydraulic pump coupling.
j.
Repair or replace pump section.
a.
Check system for leaks. Make repairs as
needed. Fill reservoir.
b. Repair or replace relief valve.
c.
Reduce load. (Refer to load chart).
d. Replace check valve.
e.
Replace hose or fittings. (Refer to
Manitowoc Crane Care Parts Manual).
f.
Replace valve section.
g. Replace piston(s) and all cylinder seals.
h. Replace all cylinder seals.
i.
Replace damaged boom section(s).
j.
Replace broken hydraulic pump coupling.
k.
Repair or replace pump.
l.
Replace pump shaft.
a.
Readjust, repair, or replace valve.
a.
Readjust valve.
a.
Readjust valve.
a.
Install hoses properly.
a.
Install hoses properly.
BOOM
4
4-19
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Troubleshooting
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Do you have a question about the Grove RT765E-2 and is the answer not in the manual?
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.
This answer is automatically generated
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.
This answer is automatically generated