CHASSIS INFORMATION --- SECTION 10 • 361
NEPTUNE 2004
10
The exhaust brake is wired to the electronically controlled transmission. When
the exhaust brake is activated going down a hill, it will help control road speed or
sufficiently slow the road speed until the Allison Transmission can automatically
downshift to the next lower gear. Downshifting automatically occurs from high
gear down to second gear. Certain road conditions and engine speeds may require
the transmission be manually shifted down in order to generate adequate engine
RPM and increase the engine brake effect.
CAUTION: Use of the exhaust brake on wet and slippery
surfaces can result in over braking and loss of traction.
NOTE: The brake lights will illuminate while the PAC Brake is
applied.
The front steer axle on the chassis is an I-beam axle design made of forged,
heat-treated alloy steel. Pivots for the axle ends are constructed using an inclined
king pin configuration, which are supplemented with steel tapered roller thrust
bearings that carry the front vehicle weight. All front axles use oil to lubricate the
wheel bearings. Inspect the oil level before every trip or every 1,000 miles. The oil
is drained and refilled without removing the wheel end assembly. Remove the hub-
cap to access the bearing cover and drain plug.
To Inspect the Oil Level:
• Remove the chrome hubcap.
• Locate the full and add mark on the outside of the clear
plastic cover.
• If the lubricant level is low, add the recommended fluid
until full.
Recommended Interval Change:
The recommended oil change interval is based on the operating conditions,
speeds and loads. The recommended fluid replacement is every 30,000 miles or
annually. Limited service applications may allow the recommended interval to be
increased. Severe applications may require the recommended interval to be
reduced. For more information, contact a Westport service representative.
Remove the filter plug and add lubricant. Allow the oil to flow throught the
bearings (this will take a few minutes), double check to see if the oil level has
reached the oil level line on hubcap face. Use EP-SAE 90 gear oil or any good
equivalent petroleum base or synthetic lubricant.
CAUTION: Do not mix petroleum based oil with synthetic based
oil. This could cause an oil seal failure.
AXLE
- Front Steer
090311b
Summary of Contents for Neptune 2004
Page 12: ......
Page 16: ......
Page 36: ......
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Page 84: ...84 SECTION 2 DRIVING SAFETY NEPTUNE 2004 Weight Label...
Page 90: ...90 SECTION 2 DRIVING SAFETY NEPTUNE 2004 020254...
Page 92: ...92 SECTION 2 DRIVING SAFETY NEPTUNE 2004 020255B...
Page 93: ...DRIVING SAFETY SECTION 2 93 NEPTUNE 2004 2 020263 Weight Record Sheet...
Page 94: ...94 SECTION 2 DRIVING SAFETY NEPTUNE 2004 VIEWS Front Rear 010726c 010725...
Page 95: ...DRIVING SAFETY SECTION 2 95 NEPTUNE 2004 2 Roadside Curbside 010723d 010724e...
Page 106: ...106 SECTION 2 DRIVING SAFETY NEPTUNE 2004 NOTES...
Page 108: ......
Page 151: ...EXTERIOR INTERIOR CARE SECTION 3 151 NEPTUNE 2004 3 NOTES...
Page 152: ...152 SECTION 3 EXTERIOR INTERIOR CARE NEPTUNE 2004 NOTES...
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Page 191: ...4 APPLIANCES SECTION 4 191 NEPTUNE 2004 NOTES...
Page 192: ...192 SECTION 4 APPLIANCES NEPTUNE 2004 NOTES...
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Page 231: ...EQUIPMENT SECTION 5 231 NEPTUNE 2004 5 NOTES...
Page 232: ...232 SECTION 5 EQUIPMENT NEPTUNE 2004 NOTES...
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Page 255: ...WATER SYSTEMS SECTION 6 255 NEPTUNE 2004 NOTES 6...
Page 256: ...256 SECTION 6 WATER SYSTEMS NEPTUNE 2004 NOTES...
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Page 276: ...276 SECTION 7 LP GAS SYSTEMS NEPTUNE 2004 NOTES...
Page 278: ......
Page 313: ...ELECTRICAL SYSTEMS HOUSE SECTION 8 313 NEPTUNE 2004 NOTES 8...
Page 314: ...314 SECTION 8 ELECTRICAL SYSTEMS HOUSE NEPTUNE 2004 NOTES...
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Page 346: ...346 SECTION 9 ELECTRICAL SYSTEMS CHASSIS NEPTUNE 2004 NOTES...
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Page 411: ...CHASSIS INFORMATION SECTION 10 411 NEPTUNE 2004 10 METRIC U S CONVERSION CHART...
Page 413: ...CHASSIS INFORMATION SECTION 10 413 NEPTUNE 2004 10...
Page 414: ...414 SECTION 10 CHASSIS INFORMATION NEPTUNE 2004...
Page 415: ...CHASSIS INFORMATION SECTION 10 415 NEPTUNE 2004 10...