GEAR 0993791 - Caterpillar

Replacing a Square Drive Assembly
Model 1U-7293
Illustration 17 g03219617
Note: Refer to the illustration above during the following steps.
Remove retaining ring and circular shims from the inputside of the torque multiplier housing.
Remove gear cage assembly from the ring gear (torque multiplierhousing). The output square drive is an integral part of the gearcage assembly.
Remove input pinion from gear cage assembly with a pullingand twisting motion. Use an arbor press to remove dowel pins fromthe planet gears.
Replace gear cage assembly with new tool.
Reassemble planet gears into cage assembly using arbor press.
Lubricate all friction points with high-grade molybdenumdisulfide grease.
Reassemble input pinion and install assembly into ring gear(torque multiplier housing). Reassemble shims and retaining ring.Model 6V-7820
Illustration 18 g03219861
Note: Refer to the illustration above for the following steps.
Insert a prying tool under the retaining ring and remove itfrom the groove in the output gear cage. Remove the old square drive.
Insert the new square drive.
Install the new retaining ring into the groove in the outputgear cage.Model 6V-6080
Illustration 19 g03219964
Note: Refer to the illustration above during the following steps.
Remove the O-Ring located on the face of the square drivecarrier.
Remove the square drive retaining pin from the output drivecarrier. Pull out the old square drive.
Insert retaining pin in output drive carrier. Be certainthat the pin engages the hole in the replacement square drive.
Reinstall the O-Ring on the square drive carrier.Application Information
Torque Multiplier Reaction
There are many different ways of absorbing torque multiplierreaction forces. Although the methods are as varied as the applications,there are common practices that should be considered.
First consider the size and type of torque tool requiredfor the application. Survey space limitations as well as the maximumtorque needed. Allow a minimum of 50% additional capacity in the toolfor breakout torque.Note: Damaged and corroded fasteners can require even greaterbreakout torque capacity. Allow a minimum of 100% over the make-uptorque for these conditions. Example: Corroded studs and a 1.36 N m (1,500 lb ft) make-up torque. Choose a tool with a capacity of at least 4.07 N m (3,000 lb ft) for breakout.
Illustration 20 g03206221
Select a solid anchor point to minimize deflection. Determinewhere the reaction forces are going to take place, for example, againsta flange or over an adjacent bolt.This point must withstand the torque tool reaction forces. Example:A 3,200 Ft lb torque multiplier, with reaction near the end of theanchor stub produces a reaction force of about 28290.7N (6360 lb). The reaction forcecan be reduced to about 10675.7 N (2400lb) by moving the reaction point toward the endof the reaction bar. Keep the reaction point tangent to the rotationof the torque output to prevent increased reaction forces.
Illustration 21 g03206337
Keep output torque rotation pure by reducing bending moments.Bending moments decrease torque efficiency and increase stress onthe tool and sockets. Keep the distance between the tool output andthe fastener as short as possible.
Illustration 22 g03206477
Increase tool life and increase working environment safetyby taking torque reaction as far out on the reaction anchor as possible.Angle of Turn Protractor
Models 6V-7820 and 6V-6080 include anangle of turn protractor. This feature allows the operator to accurately measurea specific number of degrees