INTRODUCTION
T-2-6
BACK OFF
NUT
Adjustable Fitting to Port
a0030
1.
Inspect both mating parts for burrs, nicks, scratches, or
foreign particles.
2.
Lubricate O-ring with a light coat of clean oil.
3.
Back off locknut as far as possible (A).
4.
Screw the fitting into port by hand until the backup
washer contacts the face of the port and is pushed all the
way towards the locknut (C).
5.
To orientate the fitting, unscrew the fitting the required
amount, but not more than one full turn.
6.
Hold the fitting in the desired position and tighten the nut
(D) following the F.F.F.T. method starting with step 4.
Nonadjustable Straight Thread O-ring Fitting: Fitting
to Port
Refer to (Table 1-5) for the following procedure.
1-14
1.
Make sure both threads and sealing surfaces are free of
burrs, nicks, scratches or any foreign particles.
2.
Lubricate O-ring with clean oil ((Figure 1-6)).
a0032
3.
Turn fitting until finger tight.
4.
Using the assembly torque method, tighten to given
torque for size from (Table 1-5).
Table 1-5: Straight Thread Fittings
FIGURE 1-5
Electrical System
Harnesses, Wires, and Connectors
Visually inspect all electrical harnesses, cables, and
connectors every month or 250 hours for the following:
• Damaged, cut, blistered, or cracked insulation.
• Exposed bare wires.
• Kinked or crushed wires and cables.
• Cracked or corroded connectors, battery terminals, and
ground connections.
Published 9-04-2014, Control # 422-08
RT765E-2 SERVICE MANUAL
Non-Adjustable Fitting to Port
T-2-7
FIGURE 1-6
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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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