EATON RT RTO RTLO RTLOF RTX RTF Gearbox Workshop Manual

Fuller ® Heavy Duty Transmissions Service Manual Fuller Heavy Duty Transmissions TRSM0515 October 2007 More time on the road ®

TABLE OF CONTENTS Timing Description Operations Lubrication Preventive Maintenance Torque Recommendations Air System Precautions Disassembly Front Section Disassembly Auxiliary Disassembly Auxiliary Reassembly Front Section Reassembly Reassembly Tool Reference Changing Clutch (Input Shaft) Eaton Corporation Transmission Division Kalamazoo, Mich. 49007

It is essential that the two countershafts are timed. This assures that the countershaft gears will contact the mating mainshaft gears at the same instant, allowing the mainshaft gears to seek their equilibrium position. This prohibits the mainshaft gears from climbing out of position and prevents unequal tooth contact. Timing one set of gears, the drive gear set, is all that is necessary. It is a simple procedure, consist- ing of marking the proper teeth prior to installation and meshing the teeth so marked. A. Marking countershaft drive gear teeth. 1. Prior to placing each countershaft assembly into case, clearly mark on each drive gear the gear tooth which is directly over the keyway in gear. (See illustration A.) This tooth is stamped with an "O" to aid iden- tification. A. TOOTH ON COUNTERSHAFT DIRECTLY OVER KEYWAY MARKED FOR TIMING B. Marking drive gear teeth. 1. Mark any two adjacent teeth on the drive gear. 2. Mark the two adjacent teeth on the drive gear which are directly opposite the first set marked. There should be an equal number of teeth between the markings on each side of gear. (See Illustration B.) B. DRIVE GEAR TEETH Cut 7300A CORRECTLY MARKED FOR TIMING C. Meshing marked countershaft gear teeth with marked drive gear teeth. (After installing drive gear and mainshaft assemblies, the countershaft bearings are installed to complete countershaft installation.) 1. When installing bearings on the left countershaft, mesh the marked countershaft gear tooth between two marked teeth on the drive gear. Repeat the procedure when installing the right countershaft bearings. (See Illustration C.) C. COUNTERSHAFT GEAR TEETH MESHED WITH DRIVE GEAR TEETH FOR CORRECT TIMING D. Timing auxiliary section. (In the auxiliary section, the low speed gear set is marked for timing instead of the drive gear set.) 1. 2. 3. 4. 5. 6. Mark any two adjacent teeth on the large mainshaft low speed gear, then mark the two adjacent teeth directly opposite„the same procedure as used when marking the front section drive gear. On each auxiliary countershaft assembly, mark the tooth on the small low speed gear which is stamped with an "O". Install the low speed gear and tailshaft assembly in auxiliary housing. Partially install outer races of countershaft rear bearings in case bores. Place the auxiliary countershaft assem- semblies into position, meshing marked tooth on each countershaft gear between marked teeth on low speed gear. Counter- shafts will be partially seated in rear bear- ing. Fully install rear bearings to complete auxiliary countershaft installation. TIMIMG

DESCRIPTION

SHIFTING THE 10 SPEED ROADRANGER TRANSMISSION RT-661O SERIES General Instructions The 10-speed Roadranger Transmissions provide ten selective ratios, evenly and progressively spac- ed and shifted with one lever. But you do NOT shift the Roadranger as you would a conventional transmission with an auxiliary or 2-speed axle, because there is no split-shifting. The shifting of the 10-speed Roadranger Trans- missions is much simpler.. much easier, ALL SHIFTS ARE MADE WITH ONE LEVER . . . you use the RANGE CONTROL BUTTON ONE TIME ONLY during a sequence of up-shifts . . .and ONE TIME ONLY during a down-shift pattern. Why is the Roadranger different? The Roadranger is a 2-RANGE transmission con- sisting of a5-speed front section and an automatic 2-speed auxiliary section in ONE CASE. The ten forward speeds are secured by using a 5-speed shifting pattern TWICE–the first time with the transmission engaged in Iow gear or low range; the second time engaged in high gear or high range. By using the same shifting pattern twice, the shift lever position for 6th speed is the same as lst...7th the same as 2nd, 8th the same as 3rd, 9th the same as 4th, and 10th the same as 5th. Detailed Shifting Instructions In the following instructions, it is assumed that the driver is familiar with motor trucks and tractors, and that he can coordinate the necessary movements of the shift lever and clutch pedal to make progressive and selective gear engagements in either direction, up or down. Upshifting To get to high range pull button UP while in 5th speed, then move lever to 6th speed. Let's step into the cab. 1. Move the gear shift lever to the neutral position. 2. Start the engine. 3. Wait for air system to reach normal line pressure. 4. Now look at the Range Control Button. If it is up push it to the down position. (With the downward movement of the button, the transmission will shift into low range.) If the button was down when the truck was last used, the transmission is already in low range. 5. Now start the vehicle and shift progressively through 1st, 2nd, 3rd and 4th to 5th. 6. When is 5th and ready for the next upward shift, PULL the Range Control Button UP and move the lever to 6th speed. As the Iever passes through the neutral position, the transmission will automati- cally shift from low range to high range. 7. With the transmission in high range, you may now shift progressively through 7th, 8th and 9th to 10th. Driving tip: always start vehicle moving in first speed gear. A shift diagram should be in your vehicle. If your shift diagram has been misplaced, write to Service Department, Eaton Corporation, Transmission Division, Kalamazoo, Michigan, for replacement. Please specify model number of transmission. OPERATION

EATON RT RTO RTLO RTLOF RTX RTF Gearbox Workshop Manual

You're Reading a Preview

Recently Viewed