Regional Haul Model Operator's Manual - Peterbilt Motors Company
Regional Haul Model Operator's Manual - Peterbilt Motors Company Regional Haul Model Operator's Manual - Peterbilt Motors Company
TRANSMISSION AND CLUTCH PREVENTIVE MAINTENANCE Table 9 Transmission Lubrication — Manual transmissions MODEL RECOMMENDED LUBRICANT (See Note) AMBIENT TEMPERATURE RANGE DEG. C DEG. F VISCOSITY (SAE) Eaton-Fuller HD engine oil: API CE or CF-4. Above -12 Above +10 50 Synthetic oil: Chevron RPM Synthetic Transmission Fluid, or equal, meeting MIL-L-2104D and Eaton PS-081 specifications. Above -40 Above -40 50 NOTE: Do not use multi-viscosity or EP (extreme pressure) gear oil (e.g., axle oils) in transmissions. Multi-viscosity or EP oils may damage components. Standard Transmission Oil Level NOTE: The vehicle must be parked on level ground. • Maintain the oil level and check it regularly. Oil should be up to bottom of filler plug hole. Clutch System Introduction Free pedal is the distance the clutch pedal moves by applying only slight pressure. During free pedal the release yoke in the transmission moves until its bearing pads contact the release bearing. This movement of the release yoke is called free travel. Thus, free pedal and free travel are directly related to each other. – 236 – Y53-6033 Regional Haul (R05/10)
PREVENTIVE MAINTENANCE As the clutch pedal is depressed further, with harder pressure, the release yoke moves the release bearing away from the engine. This causes the clutch plate to release from the driven disks in the clutch. This is called release travel. And finally, on 9-, 10-, and 11-speed transmissions, as the pedal is pushed to the last 1/2 to 1 inch of travel, the release bearing contacts and engages the clutch brake. This is called clutch brake squeeze. When the clutch wears, the release bearing gradually moves toward the engine, decreasing free pedal and free travel. When all free pedal and free travel are gone, the clutch requires adjustment. The clutch is adjusted by turning an adjustment ring that is built into the clutch. When the ring is turned, the release bearing moves back toward the transmission, restoring free pedal and clutch free travel. Under normal clutch wear this is the only adjustment needed. Do not attempt to change any other component. See the Maintenance Manual for details. Clutch Adjustment — Normal Wear Clutch pedal free travel is usually 1 3/4 in. to 2 in. (34 to 51 mm). This should be your guide for determining whether your truck needs clutch adjustment. Also, if it becomes TRANSMISSION AND CLUTCH increasingly difficult to shift into gears, or the truck creeps with the clutch pedal depressed, your clutch needs adjustment. See the Maintenance Manual for the proper adjustment procedures. Some vehicles have automatic clutch adjustment. If yours doesn't have this feature, adjustment will have to be done by a trained certified mechanic. Have the adjustment done before clutch pedal free travel is reduced to the minimum allowable 1/2 in. (13mm). Clutch Linkage The Regional Haul vehicle is equipped with a rod and lever mechanical clutch linkage. Lubricate each pivot point on the clutch linkage. Automatic Transmissions Service Intervals Check daily with engine idling. See Table 1, “Recommended Maintenance Intervals,” Page 150 for service intervals. Regional Haul (R05/10) Y53-6033 – 237 –
- Page 189 and 190: PREVENTIVE MAINTENANCE BRAKE SYSTEM
- Page 191 and 192: PREVENTIVE MAINTENANCE be performed
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- Page 269 and 270: INDEX C lubrication 182 operation 1
- Page 271 and 272: INDEX E vehicle inspection 81 with
- Page 273 and 274: INDEX I Headllights 15 Heater and a
- Page 275 and 276: INDEX R R Radio 16, 71 Rear axle 24
- Page 277: INDEX V Underinflated tires 201 V V
PREVENTIVE MAINTENANCE<br />
As the clutch pedal is depressed further, with harder pressure,<br />
the release yoke moves the release bearing away<br />
from the engine. This causes the clutch plate to release<br />
from the driven disks in the clutch. This is called release<br />
travel. And finally, on 9-, 10-, and 11-speed transmissions,<br />
as the pedal is pushed to the last 1/2 to 1 inch of<br />
travel, the release bearing contacts and engages the<br />
clutch brake. This is called clutch brake squeeze. When<br />
the clutch wears, the release bearing gradually moves<br />
toward the engine, decreasing free pedal and free travel.<br />
When all free pedal and free travel are gone, the clutch<br />
requires adjustment.<br />
The clutch is adjusted by turning an adjustment ring that is<br />
built into the clutch. When the ring is turned, the release<br />
bearing moves back toward the transmission, restoring<br />
free pedal and clutch free travel. Under normal clutch<br />
wear this is the only adjustment needed. Do not attempt to<br />
change any other component. See the Maintenance<br />
<strong>Manual</strong> for details.<br />
Clutch Adjustment — Normal Wear<br />
Clutch pedal free travel is usually 1 3/4 in. to 2 in. (34 to 51<br />
mm). This should be your guide for determining whether<br />
your truck needs clutch adjustment. Also, if it becomes<br />
TRANSMISSION AND CLUTCH<br />
increasingly difficult to shift into gears, or the truck creeps<br />
with the clutch pedal depressed, your clutch needs adjustment.<br />
See the Maintenance <strong>Manual</strong> for the proper<br />
adjustment procedures.<br />
Some vehicles have automatic clutch adjustment. If yours<br />
doesn't have this feature, adjustment will have to be done<br />
by a trained certified mechanic. Have the adjustment<br />
done before clutch pedal free travel is reduced to the minimum<br />
allowable 1/2 in. (13mm).<br />
Clutch Linkage<br />
The <strong>Regional</strong> <strong>Haul</strong> vehicle is equipped with a rod and<br />
lever mechanical clutch linkage. Lubricate each pivot<br />
point on the clutch linkage.<br />
Automatic Transmissions<br />
Service Intervals<br />
Check daily with engine idling. See Table 1, “Recommended<br />
Maintenance Intervals,” Page 150 for service<br />
intervals.<br />
<strong>Regional</strong> <strong>Haul</strong> (R05/10) Y53-6033 – 237 –